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FlowPressureTemperatureHumidityAir Quality

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Isn't it time you had other options for your HVAC instrumentation?

Global Expertise Solving Your ProblemsIndustry Focus on Your NeedsCustomized Designs

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Part of your business

Our knowledge for your success

In the course of the last six decades, the name WIKA has become a symbol for sophisticated solutions in the field of pressure and temperature measurement.

Our ever increasing ability is the basis for implementation of innovative technologies in the form of reliable products and efficient system solutions.

We owe our leading position in the world market to the consistent dedication towards premium quality, to which, today, 7,000 employees of the WIKA group of companies are committed. More than 500 experienced sales staff ensure that our customers are individually and competently advised and looked after from the outset. Anywhere and anytime.

Certified quality

The WIKA quality assurance management system has been certified in accordance with ISO 9001 since 1994. The quality and safety standards of our company meet the standard systems of several countries.

Made by WIKA

The development and high-tech production in WIKA-owned modern production facilities (Germany, Brazil, China, India, Canada, Poland, Switzerland, South Africa and U.S.A.) is the best warranty for our flexibility.

Whether SMD automatic insertion machines, CNC automatic machining centres, welding robots, laser welding, sputterers, thermotransfer printing or thin film production - we explore all possibilities to achieve above-average results. And the end result: More than 43 million quality products are delivered year in, year out, in more than 100 countries. Worldwide, approximately 350 million WIKA measuring instruments are in use.

Applying WIKA's world-renowned expertise to your HVAC challenges

DKD/DAkkS accredited calibration laboratories for pressure and tempe-rature

Fully automatic production of measuring instruments

The modern high-bay warehouse ensures efficient logistics

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Contents

A2G-05 Eco differential pressure gauge 5

A2G-10 Differential pressure gauge 6

A2G-15 Differential pressure gauge with electrical output signal 7

A2G-20 Air velocity and temperature transmitter 8

A2G-25 Air flow transmitter 9

A2G-30 Inclined tube manometer 10

A2G-40 Differential pressure switch 11

A2G-45 Electronic differential pressure transmitter with display and switch relay 12

A2G-50 Differential pressure transmitter 13

A2G-55 Eco differential pressure transmitter 14

A2G-60 Duct/immersion temperature sensor 15

A2G-61 Duct temperature sensor 16

A2G-65 Frost protection thermostat 17

A2G-70 Duct sensor for relative humidity and temperature 18

A2G-80 Air quality sensor VOC 19

A2G-85 CO2 sensor 20

A2G-90 Differential pressure gauge Airbox with differential pressure switch 21

Accessories 22

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New air2guide™ Product Family for HVACWIKA’s air2guide™ series offers a comprehensive range of filter and ventilation monitoring systems, including differential pressure gauges (mechanical and electronic) for filter monitoring, incline tube manometers, differential pressure switches, differential pressure transmitters and air flow velocity transmitters for measuring the volume flow and air velocity in air ducts.

The product range is completed by a volatile organic compound (VOC) air quality sensor and a CO2 sensor, used to measure VOC and carbon dioxide (CO2) content in the air.

Easy to install and remove Up to 50% time savings during installation, compared with competitive conventional models Easier calibrations

What's Your Application?

Instrument requirement,application example

EXHAUST AIR

OUTSIDE AIR

SUPPLY AIR

RETURN

AIR

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Eco differential pressure gaugeModel A2G-05

Applications For monitoring the

differential pressure of air and other non-inflamma-ble and non-aggressive gases

Ventilator and blower monitoring

Differential pressure monitoring in filters

Overpressure monitoring in clean rooms

Special features Easy to install and

remove Small installation depth

(1.65”), for recessed installation in doors and walls of clean rooms

Integrated sealing element for installation in the air duct

The A2G-05 differential pressure gauges are ideally suited for the measurement of overpressure, negative pressure and differential pressure in the measuring ranges from 0 … 0.2 InWC to 0 … 50 InWC and from -0.1 … +0.1 InWC to -6 … +6 InWC. The biggest advantage of the A2G-05 over other competitive models is the 2-part modular design of the gauge. The instruments are quick and easy to install. The measuring element and the mounting ring are separated. In case of repairs or service of the instrument, the measuring device can be easily replaced while the mounting flange remains in the panel, reducing down times and resulting in cost savings during installations. Due to its small mounting depth (1.65”) the A2G-05 is ideally suited for installations into doors or walls of clean rooms.

Installation

A2G-05

Specifications A2G-05

Nominal size 4½”Accuracy class ±3% of full span (±5% for ranges ≤ 0.5 InWC)

Measuring range0 … 0.2 InWC to 0 … 50 InWC and from -0.1 … +0.1 InWC to -6 … +6 InWC. Additional measuring units such as PA, kPa, mmWC and mbar available.

Permissible temperatures Ambient from -22 … 176°FMedia from +3 … 122°F

Ingress protection NEMA 3 (NEMA 4 optional)Process connection Fixed angled connectors for hose ID’s from 3/16” to ¼”Sensing membrane SiliconeMovement Frictionless magnetic transmission (Swiss movement)Dial AluminiumPointer Plastic (red mark pointer, optional)Window Polycarbonate (UV stabilized)Case & mounting flange Fiberglass reinforced thermoplastic

Standard accessories 3 mounting screws,for further accessories see page 20

Datasheet A2G-05

With fixed mounting flange

With threaded mounting flange

6

Applications For dry, clean, non-

aggressive gases, air Monitoring of blowers

and ventilators Filter monitoring via

differential pressure Positive overpressure in

clean rooms Positive and negative

pressure in isolation chambers

Special features Easy to install 2-part modular design With integrated O-ring

on mounting case for installation in air ducts

Standard accessories

Differential pressure gaugeModel A2G-10

The A2G-10 differential pressure gauge is ideally suited for the measurement of overpressure, negative pressure and differential pressure in the measuring ranges from 0 … 0.2 InWC to 0 … 50 InWC and from -0.1 … +0.1 InWC to -6 … +6 InWC. A benefit of the modular design is the two-part assembly that separates the measuring system from the mounting case. This allows the replacement of the measuring system only, resulting in reduced service cost. The panel mount version of the A2G-10 is extremely easy to install and requires no tools (over 50% time savings compared to conventional instruments).





Ingress protection NEMA 3 (NEMA 4 optional)Process connection 2 x G ⅛ female (comes standard with 3/16” hose barb adaptor)Separating diaphragm SiliconeMovement Frictionless magnetic transmission (Swiss movement)Dial AluminiumPointer Plastic (red mark pointer, optional)Window Polycarbonate (UV stabilized)Basic case, case for panel and wall mounting Fiberglas reinforced thermoplastic

Standard accessories 3 case mounting screws, straight or angled hose barb adaptors ⅛" / 3/16" standard (¼" optional)

Datasheet A2G-10

A2G-10

Panel Mount

Surface Mount

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A2G-15

Differential pressure gauge with electrical output signalModel A2G-15

Applications For dry, clean, non-

aggressive gases, air Monitoring of blowers

and ventilators Filter monitoring via

differential pressure Positive overpressure in

clean rooms Positive and negative

pressure in isolation chambers

Special features Easy to install 2-part modular design With integrated O-ring

on mounting case for installation in air ducts

0 ... 10V, 3-wire output signal (additional output signal on request)

Standard accessories

In addition to the local display, the A2G-15 also offers an analog output signal. The A2G-15 is available with a 3-wire 0 … 10V output signal. The output signal allows for remote monitoring of the pressure differential and communication with the control panel of your ventilation and air-conditioning system. The A2G-15 is identical in design to the mechanical version and available in measuring ranges from 0 … 0.2 InWC to 0 … 50 InWC and from -0.1 … +0.1 InWC to -6 … +6 InWC. It features the same benefits allowing a replacement of the measuring system without disconnecting any electrical or pressure connections.





Ingress protection NEMA 3 (NEMA 4 optional)Process connection 2 x G ⅛ female (comes standard with 3/16” hose barb adaptor)Separating diaphragm SiliconeMovement Frictionless magnetic transmissionDial AluminiumPointer Plastic (red mark pointer, optional)Window Polycarbonate (UV stabilized)Basic case, case for panel/wall mounting Fiberglass reinforced thermoplastic

Output signal 0 … 10 V, 3-wirePower supply UB DC 15 … 35 VElectrical connection Cable gland M12

Standard accessories 3 case mounting screws, straight or angled hose barb adaptors ⅛" / 3/16" standard (¼" optional)

Datasheet A2G-15

Panel Mount

Surface Mount

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Air velocity and temperature transmitterModel A2G-20

Applications Building automation and

process control systems Supply and exhaust fan

tracking Clean room control

systems

Special features Three air velocity ranges,

one temperature range, selectable by jumpers

Separate outputs for air velocity and temperature

Two output signals (4 ... 20 mA and 0 ... 10 V) in one instrument

Comes standard with duct mounting flange

Simple installation Optional digital display

and relay available

The A2G-20 air velocity transmitter is ideal for measuring air velocity and temperature in HVAC systems and control applications, especially building automation and energy management systems. The A2G-20 offers three air velocity ranges, one temperature range and two output signals combined into one instrument. The A2G-20 calculates the air velocity based on measuring the heat loss between the two sensing elements. Due to the design of the two measuring elements, the A2G-20 is basically immune from drifts, making this transmitter very accurate over the whole range (± 5% accuracy).


Measuring range & Accuracy

Air velocity:0 ...390 FPM : < 19.6 FPM (±) 5% of measured value0...1,970 FPM : < 98.1 FPM (±) 5% of measured value0 ... 3,940 FPM : <196.2 FPM (±) 5% of measured valueTemperature: +32 ... 122 °F (0 ... 50 °C) < 1.2 °F (< 0.5 °F)

Permissible temperatures Ambient from +32 ... 122 °F, max. 85% rHMedia from +32 ... 122 °F, max. 85% rH

Ingress protection NEMA 3 (IP 54)

Output signal

Air velocity:0 … 10 V (linear to FPM): Load min. 1 kΩ or4 … 20 mA (linear to FPM): Load max. 400 ΩTemperature:0 … 10 V (linear to °F): Load min. 1 kΩ or4 … 20 mA (linear to °F): Load max. 400 Ω

Supply voltage DC 24 V/AC 24 V ±10 %Weight 0.5 lbs.Measuring element Pt1000 and NTC10kCase Plastic (ABS), standard without displayElectrical connection PG gland M16Type of mounting Duct installation

Standard accessories Mounting flange,for further accessories see page 26

Datasheet A2G-20

A2G-20

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Air flow transmitterModel A2G-25

Applications For measuring the

volume flow in ventilation ducts of air and other non-inflammable and non-aggressive gases

For measuring, monitoring and controlling the air volume flow of centrifugal ventilators

For operating fans/ventilators from specific manufacturers

OEMS seeking a DP transmitter for their primary element

Special features Simple mounting User-friendly display Easy-to-read LCD

display Temperature

compensated Compact and robust

design Standard accessories

included

The A2G-25 for measuring the volume flow is based on the differential pressure value measured directly in the ventilator. With the help of the K factor and the measured differential pressure the volume flow is automatically calculated. The instrument can be used for displaying the air quantity on site or for sending the output value to a control system. With the A2G-25 volume flows of up to 200,000 m3/h can be measured.It is configured to work with differential producers from specific OEMs.


Measuring range & Accuracy

0 ... 4 InWC (1,000 Pa): ± 0.02 InWC (5 Pa) ... ±1.5 % of display0 ... 8 InWC (2,000 Pa): ± 0.02 InWC (5 Pa) ... ±1.5 % of display0 ... 20 InWC (5,000 Pa): ± 0.03 InWC (7 Pa) ... ±1.5 % of display0 ... 28 InWC (7,000 Pa): ± 0.03 InWC (7 Pa) ... ±1.5 % of display

Permissible temperatures Ambient temperature: +14 ... +122 °FMedium temperature: +23 ... +122 °F

Ingress protection NEMA 3 (IP 54)

Output signal

V OUT DC 0…10 V , load R minimum 1 kΩ linear to the set output unitP OUT DC 0…10 V, load R minimum 1 kΩ linear to the set output unit

Supply voltage AC 24 V or DC 24 V ±10 %Weight 5.3 oz.Process connection For hoses of inner Ø 4 mm or 6 mmMeasuring element Piezo sensorCase Plastic (ABS), cover polycarbonate (PC)Electrical connection M16 cable glandMounting Wall mountingStandard accessories 2 mounting screwsDatasheet A2G-25

A2G-25

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Inclined tube manometerModel A2G-30

Applications Monitoring differential

pressure of air and other non-combustible, non aggressive gases

Monitoring of ventilators, fans and filters in climatic chambers and clean rooms

Filter monitoring in paint booths

Special features Easy to install Leakage protection Easy-to-read scale Fast and easy zero point

adjustment Standard accessories

included

The A2G-30 incline tube manometer is suitable for measuring overpressure, negative pressure and differential pressure continually and accurately. A precise zero point adjustment is undertaken by changing the volume of the liquid with the zero adjustment knob. The manometer is specially designed to prevent leakage of the indicator fluid in case of overpressure. The manometer should be mounted horizontally in an upright position.


Accuracy 0.2 / 0.10 InWCMeasuring range 0 / 2.4 InWCPermissible temperatures -40 ... +140 °FMax. pressure 30 psi (200 InWC)Process connection Hose barb nozzles for 3/16" or 1/4" hoseCase PlasticCase cover PlasticScrews PlasticSealing NBR

Standard accessories 2 mounting screws , filling liquid 30 ml , red and green pressure limitation stickers, for further accessories see page 26

Datasheet A2G-30

A2G-30

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www.air2guide.com

Applications Ideal for use with air and

other non-combustible gases

Monitoring of air filters, fans, industrial cold air circuits, air flow in ventilation ducts and the control of air and fire shutters

Overpressure monitoring in cleanrooms and laboratories

Special features Eight selectable pressure

ranges Two output signals in one

instrument Easy installation and

mounting Robust housing and

functional design Standard accessories

included

Differential pressure switchModel A2G-40

The A2G-40 is an adjustable differential pressure switch used for measuring positive or negative overpressure or differential pressure of air or other non-combustible, non-aggressive gases. The black adjustment knob allows for easy setting of the switch point on site. The switch can be set up as an N/O or N/C contact. The compact size, adjustment knob and low cost make the A2G-40 the ideal choice for HVAC applications.


Switch point accuracy

Lowest limit Highest limit0.08 ... 0.80 InWC0.12 ... 1.20 InWC0.12 ... 2.00 InWC0.16 ... 2.40 InWC0.40 ... 6.00 InWC2.00 ... 18.0 InWC

±0.02 InWC±0.02 InWC±0.02 InWC±0.02 InWC±0.04 InWC±0.20 InWC

±0.08 InWC±0.12 InWC±0.12 InWC±0.12 InWC±0.20 InWC±0.80 InWC

Switching differential 0.04 ... 0.72 InWC

Measuring range 0.08 ... 0.80 InWC, 0.12 ... 1.20 InWC, 0.12 ... 2.00 InWC, 0.16 ... 2.40 InWC, 0.40 ... 6.00 InWC, 2.00 ... 18.0 InWC

Temperature limitations Ambient temperature: -40 ... +185 °FMedium temperature: -4 ... +160 °F

Ingress protection NEMA 3 (IP 54)Contact rating 2A/AC 250 VWeight 5.2 oz.Process connection Hose barb for 3/16" of 1/4" hose IDDiaphragm SiliconeCase PlasticWindow PolycarbonateSealings PlasticElectrical connection Cable gland M16Type of mounting Wall mounting Standard accessories 2 mounting screws, for further accessories see page 26Datasheet A2G-40

A2G-40

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Electronic differential pressure transmitter with display and switch relayModel A2G-45

Applications Monitoring of air filters,

blowers, industrial cooling air circuits, flows in ventilation ducts

Control of air and fire shutters, frost protection for heat exchangers

Overpressure monitoring in clean rooms and laboratories

Special features Simple mounting Compact and robust

design Simple setting of up to

two switch points

The A2G-45 is an electronic differential pressure switch for monitoring the differential pressure of air and other non-inflammable and non-aggressive gases. It is used for monitoring and switching pressures in facility management, air-conditioning and clean room systems.


Accuracy class 1.5 of full span%

Measuring range

Option 1:-2 ... +2 InWC (factory set)(-0.4 ... +0.4 InWC, -1 ... +1 InWC, -1.2 ... +1.2 InWC, selectable in menu)

Option 2:0 ... 10 InWC (factory set)(0 ... 0.4 InWC, 0 ... 1 InWC, 0 ... 4 InWC, selectable in menu)

Four measuring ranges can be selected at the instrument via jumpers(For measuring ranges below 1 InWC the automatic zero adjustment is recommended) (AZ)Option: Automatic zero adjustment (AZ), 2 relay outputs (2R), automatic zero adjustment and 2 relay outputs (AZ-2R)

Temperature limitationsAmbient temperature: -4 ... +158 °F, 95 % rH, non-cond.Medium temperature: +14 ... +122 °F (+23 ... +122 °F for AZ models)

Ingress protection NEMA 3 (IP 54)Output signal 0 … 10 V, load resistance min. 1 kΩ, 1 relay outputPower supply UB AC 24 V ±10 % or DC 21 ... 35 VWeight 5.2 oz.Process connection Hose barb for 3/16" of 1/4" hose IDMeasuring element Piezo measuring cellCase PlasticElectrical connection Cable gland M16 and M20Type of mounting Wall mountingStandard accessories 2 mounting screws, for further accessories see page 26Datasheet A2G-45

A2G-45

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Applications Measuring the differential

pressure of air and other non-combustible and non-aggressive gases

Monitoring of air filters, fans, industrial cold air circuits, flows in ventilation ducts and to control the fire prevention flaps in fire shutters

Monitoring of overpressure in clean rooms and laboratories

Special features Eight selectable ranges

in one instrument Easy installation Adjustable response time Zero reset button Compact, robust design Two output signals in one

instrument Standard accessories LCD display (optional)

The A2G-50 differential pressure transmitter is equipped with a piezo pressure sensor. The A2G-50 combines excellent performance and high quality at a competitive price. The A2G-50 comes standard with eight selectable pressure ranges and the user can choose between two output signals. A digital display for local pressure indication is available as a kit and can be installed on site by the user.

Differential pressure transmitterModel A2G-50


Accuracy class ±1.5% of full span

Measuring range

Variant 1:0 … 10 InWC (*)-0.4 … +0.4 InWC0 … 0.4 InWC0 … 1 InWC0 … 2 InWC0 … 4 InWC0 … 6 InWC0 … 8 InWC

Variant 2:0 … 28 InWC (*)0 … 4 InWC0 … 6 InWC0 … 8 InWC0 … 10 InWC0 … 12 InWC0 … 16 InWC0 … 20 InWC

Variant 3:-1 … +1 InWC (*)-0.1 … +0.1 InWC-0.2 … +0.2 InWC-0.4 … +0.4 InWC0 … 0.1 InWC0 … 0.2 InWC0 … 0.4 InWC0 ... 1 InWC

(*) Factory set(Only available with automatic zero adjustment) (AZ)

(For measuring ranges below 1 InWC the automatic zero adjustment is recommended)Optional: LCD display (D), automatic zero adjustment

Temperature limitations Ambient temperature: -4 ... +160 °FMedium temperature: +14 ... +122 °F

Ingress protection NEMA 3 (IP 54)Output signal DC 0 … 10 V, 3-wire, 4 … 20 mA, 3-wirePower supply UB AC 24 V or DC 24 VWeight 5.2 oz.Process connection Hose barb for 3/16" of 1/4" hose IDMeasuring element Piezo measuring cellCase PlasticElectrical connection Cable gland M16Type of mounting Wall mounting Standard accessories 2 mounting screws, for further accessories see page 26Datasheet A2G-50

A2G-50

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Applications Measuring the differential

pressure of air and other non-combustible and non-aggressive gases

Monitoring of overpressure in clean rooms and laboratories

Monitoring of overpressure in containment systems

Ideal for the building automation to monitor air ventilation ducts and air filters

Special features Easy installation Maintenance free Compact and robust

construction Comes without

accessories 0 ... 10V output signal

The A2G-55 differential pressure transmitter is based on the piezo-resistive measuring principle. This compact differential pressure transmitter is a cost-effective version of our standard DP transmitter. The features are limited to a limited number of basic functions. Nevertheless, this instrument stands for precision, high quality and functional handling. The A2G-55 is available in positive ranges from 0 ... 1 InWC up to 0 ... 20 InWC. Compound ranges (+/- ranges) are not available.


Accuracy ±2.5 % of full span

Measuring range

0 ... 1 InWC0 ... 2 InWC0 ... 3 InWC0 ... 4 InWC

0 ... 5 InWC0 ... 10 InWC0 ... 15 InWC0 ... 20 InWC

Temperature limitations Ambient temperature: +14 ... +122 °FMedium temperature: +14 ... +122 °F

Ingress protection NEMA 4 (IP 65)Output signal 0 … 10 V (4 … 20 mA optional)Supply voltage DC 13 ... 32 VWeight 8.7 oz.Process connection Hose barb nozzles for hose ID < 0.22"Measuring element Piezo measuring cellCase PlasticElectrical connection Cable gland M16Type of mounting Wall mountingStandard accessories Without, for further accessories see page 26Datasheet A2G-55

Eco differential pressure transmitterModel A2G-55

A2G-55

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Applications For temperature

measurement of gaseous media in HVAC systems

Designed to be used with PLC’s and other control and display panels

Suitable for liquid media if installed inside a thermowell

Special features Easy installation Six selectable

temperature ranges Compact and robust

design Directly mounted into the

process (gaseous media only)

Comes standard with mounting flange

Duct/immersion temperature sensorModel A2G-60

The A2G-60 duct/immersion temperature sensor is fitted with two Pt1000/Ni1000 RTD sensing elements. A2G-60 is mainly used in ventilation, cooling and climate control systems. This temperature sensor is optional available with 0…10 V (TRV) or 4…20 mA (TRA) output signal with six different range settings within one unit. The temperature sensor is made of high-quality material and manufactured using state-of-the-art production methods. To protect the sensor inside the stem against moisture and mechanical stress, the stem is optional available with a black epoxy powder coating.


Measuring range

Temperature sensor passive/Pt 1000 A DIN and Ni1000Standard: -58 ... +320 °F (-50 ... +160 °C)High temperature version: -58 ... +500 °F (-50 ... +260 °C)Transmitter ranges, active (TRV/TRA)+32 ... +122 °F (0 … +50 °C), factory set rangeAdditional ranges selectable via jumper:-58 ... +122 °F (-50 … +50 °C)+5 ... +95 °F (-15 … +35 °C)+14 ... +248 °F (-10 … +120 °C)+32 ... +320°F (0 … +160 °C)+32 ... +482 °F (0 … +250 °C)

Transmitter output TRV 0 ... 10 V, min. load 5 kΩ, terminal, 3-pin (3-wire), or TRA 4 ... 20 mA (2-wire)

Power consumption Typically 0.35 W / 0.82 VAAccuracy ± 1 % of measuring range

Temperature limitations

Head temperature:-31 … +194 °F passive (Pt1000 A DIN and Ni1000) -31 … +160 °F active (TRV and TRA)At stem:Standard: -58 … +320 °FHigh temperature version: -58 ... +500 °F

Stem material 316 SSIngress protection NEMA 4 (IP 65)Stem dimensions 7.55 x 0.275" (192 x 7 mm), other lengths on requestElectrical connection Cable gland M16Weight 5.2 oz.Datasheet A2G-60

A2G-60

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A2G-61

Bimetal thermometersDuct temperature sensorModel A2G-61

The air2guide A2G-61 bimetal duct temperature sensor with analogue display is used for monitoring temperature in ventilation systems.


Accuracy Class 2 per EN 13190Scale range 0 ... +140 °FMeasuring element Bimetal coilIngress protection IP 42 per EN 60529Case AluminumFront flange Aluminum, anodized, natural finishWindow Clear non-splintering plasticStem material and diameter Brass, not sealed, 0.35 inches (= 9 mm)Mounting Front flange with 3 mounting holesInsertion length 6.3 in.Zero adjustment At bottom of stemDatasheet A2G-61

Applications Monitoring of the

temperature in ventilation systems

Special features Simple mounting No power supply With mounting template

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Frost protection thermostatModel A2G-65

The A2G-65 frost protection thermostat features an antifreeze function and is an essential product for systems in which the temperature is not allowed to drop below a certain fixed temperature. Typical applications include air heaters in air conditioning systems and heat exchangers in cooling systems.


Adjustable set point range -14 … +59 °F (factory set to +41 °F)Dead band 3.6 ±1.8 °FRepeatability ±0.9 °FActive sensor length 23.6 in.Capillary length 9 ft. (6 or 18 ft. optional)

Switching outputSPDT switch, max. AC 250 V, max. 10 AContact material:Ag/Ni (90 % / 10 %), gold-plated 3 µm

Reset feature Automatic (manual reset optional)Cable entry Cable gland M16 x 1.5Ingress protection NEMA 4 (IP 65)

Permissible temperaturesAmbient temperature: -22 … +158 °F/max. 85 % rH, non-cond.Medium temperature: W+ min. 2 K …+158 °F(W = selected set point)

Case / cover material Lower body: PA GK30Cover: Clear ABS

Capillary tube Material: CopperCapillary tube filling: R 507

Datasheet A2G-65

Applications For air-side temperature

control and prevention of frost damage to water heating coils in ventilation and air-conditioning systems

Special features Small switching

differential High repeatability Automatic resetting

A2G-65

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Duct sensor for relative humidity and temperatureModel A2G-70

Applications For measuring relative

humidity and temperature of gaseous media in heating, cooling and air-conditioning systems

Designed for PLC’s and other control and display panels

Special features Easy installation Direct assembly into the

process Compact and robust

design Comes standard with

mounting flange

The measurement of relative humidity and media temperature is becoming increasingly important in control systems. Humidity and temperature controlled ventilation systems are also being used more frequently in air conditioning and ventilation technology. The A2G-70 determines the relative humidity and temperature of the ambient air or the air in a duct system using a capacitive sensor with integrated temperature measurement. The sensor signals are converted into standard output signals and made available for further processing. The sensor element is protected by a sinter filter.


Power supply UB DC 15 ... 24 V/AC 24 V ±10 %

Measuring range Humidity: 5 ... 95 % rH (working range 0 ... 100 %)Temperature: -4 ... +176 °F

Transmitter output Humidity: DC 0 ... 10 V, load: min. 5 kΩTemperature: DC 0 ... 10 V, load: min. 5 kΩ

Power consumption 0.5 W/1.7 VA

Accuracy Humidity: ±3 % between 20 ... 80 % rHTemperature: ±1 % of measuring range

Temperature limitations Ambient temperature: -4 ... +158 °FSensor tip: max. +140 °F

Ingress protection Connection head NEMA 4 (IP 65)Insertion length L 5.1 in., other lengths on requestElectrical connection Cable gland M16Sensor tube PVC, blackFilter element Stainless steel, mesh width 80 µmConnection head PA6, whiteDatasheet A2G-70

Optional 4 ... 20 mA

A2G-70

19

Applications For the measurement of

indoor air quality The air quality sensor

detects oxidizing gases and vapors such as body odor, tobacco smoke and evaporations from materials (furniture, carpets, coats of paints, glues etc.)

In applications where air quality is essential, e.g. build-ings, offices, class rooms, kitchens etc.

Special features The set point for the

required air quality can be preset on installation

Low consumption, reduced energy costs

Standard offering includes mounting flange

Air quality sensor VOCModel A2G-80

The A2G-80 measures volatile organic compounds in the air. VOC, volatile organic compounds, is the collective name for organic substances suspended in the air like gases or vapours. VOCs include scent and taste particles, tobacco smoke, building chemicals, solvents, disintegrating gases and products of oxidation. VOCs therefore come from a variety of sources.The A2G-80 is a sensitive, cost-effective sensor for measu-ring air quality. This module uses micro-metallic oxide semi-conductor (MOS) technology for the detection of a variety of volatile organic compounds.


Power consumption 1.2 W/2.2 VAOutput signal 0 ... 10 V, load min. 10 kΩWarm-up time 30 minutesTemperature limitations Ambient temperature: -4 ... +122 °FHumidity range Max. 85 % rH, non-condensingIngress protection IP 20Weight 5.2 oz.Datasheet A2G-80

A2G-80

20

CO2 sensorModel A2G-85

The A2G-85 duct-mountable carbon dioxide sensor measu-res the carbon dioxide content in rooms. Wherever people are staying in enclosed areas, the CO2 content is an evident indicator for the indoor air quality. The higher the CO2 content the worse the air quality in the rooms. The CO2 sensing element is based on the “Non-Dispersive InfraRed (NDIR)” technology. An auto-calibration procedure compensates for any drifts and guarantees maintenance free service and longevity. Once installed into a duct, a small flow of air will be established by convection through the probe into the trans-mitter housing and back into the duct. Inside the transmitter housing the air will diffuse through a membrane into the CO2 sensing element. The complete process inside a closed loop avoids pollution of the CO2 sensor. The A2G-85 is optional available with a 3 LED display for the CO2 content.

Applications For measuring the CO2

content in rooms

Special features Simple mounting Compact and robust Direct installation into the

process


Voltage supply DC 15 ... 24 V (±10 %) or AC 24 V (±10 %) (SELV)Power consumption Max. 3 W/max. 6 VAOutput signal CO2, 0 ... 10 V, load max. 10 mACO2 sensor 0 ... 2,000 ppmTemperature dependency CO2: < 0.2 % of full scale value per °CAccuracy at 21°C CO2: Typically ±40 ppm +4 % of measured valueCase Cleaar plastic cover 4.7 x 4.7 x 3.3 in (120 x 120 x 85 mm)Probe dimensions 11.8 x 1.2 in. (300 mm x 30 mm), including mounting flangeIngress protection IP 20

Temperature limitations

Ambient temperature:+32 ... +122 °F, (0 ... +50 °C)Medium temperature+32 ... +122 °F, (0 ... +50 °C), max. 85 % rH non-condensing

Weight 2.9 lbs.Datasheet A2G-85

A2G-85

21

Applications For monitoring the

differential pressure of air and other non-inflammable and non-aggressive gases

Monitoring of air filters, blowers, industrial cooling circuits, flows in ventilation ducts and the control of air and fire dampers

Special features Compact indicator and

pressure switch fitted within a plastic case (Airbox)

Single pole micro switch (SPDT)

Switch point settable when installed

All connections already pre-assembled

Differential pressure gauge Airbox with differential pressure switchModel A2G-90

The A2G-90 is a combination of a mechanical analog indicator (A2G-85) and a differential pressure switch (A2G-85) combined into one enclosure. The case is made from PC /ABS 1625 (H x W x D = 9-1/2 x 7-1/2 x 4-1/3 inches). The cover is screw retained for easy access to the pressure switch and sealed with an o-ring for a NEMA 3 ingress protection. The A2G-90 is ideally for the measurement and switching of overpressures and differential pressures in ranges from 0…1 InWC up to 0…25 InWC.


Case Plastic PC/ABS 1625 (H × W × D = 9½ × 7½ × 4 1/3 in.)Cover Screw retainedIngress protection NEMA 3 (IP 54 per EN 60529/IEC 529)Pressure connections Top connected compression fittings for 3/16" or 1/4" hose IDElectrical connection Angular connector DIN 43650, 3-pin + PE

Temperature limitations Ambient: -22 … +140 °FMedium: -3.2 … +122 °F

Datasheet A2G-90

Specifications A2G-10 mechanical differential pressure gauge

Accuracy ± 3 % of measuring range

Measuring range 0 … 1 InWC, 0 … 2 InWC, 0 … 3 InWC, 0 … 6 InWC, 0 … 8 InWC, 0 … 25 InWC

Datasheet A2G-10

Specifications A2G-40 differential pressure switch

Measuring range 0.08 … 0.80 InWC, 0.12 … 0.12 InWC, 0.12 … 2 InWC, 0.16 … 2.40 InWC, 0.4 … 6 InWC, 2 … 18 InWC

Datasheet A2G-40

A2G-90

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air2guide accessories

Description Model Specifications E-No.

Panel mount case A2G-10 Black thermoplastic 40195554A2G-15 Black thermoplastic 40195562

Surface mount caseA2G-10 Black thermoplastic 40195571A2G-15 Black thermoplastic 40195597

Threaded bezel A2G-10, A2G-15 Black thermoplastic 40217477Mounting flange A2G-05 Black thermoplastic 40371212Adapter ring A2G-10, A2G-15 To adapt gauge to larger panel openings 40229424

Duct connector

A2G-10, A2G-15, A2G-30, A2G-40, A2G-50, A2G-55 For 1/8", 3/16" tube ID 40217507

A2G-10, A2G-15, A2G-30, A2G-40, A2G-50, A2G-55 For 1/4", tube ID 40217531

Hose barb adaptors(G ⅛ female instrument side)

A2G-10, A2G-15

Straight, 3/16" hose ID 40179958Straigh, 1/4" hose ID 40179966Angled, 3/16" hose ID 40179974Angled, 1/4" hose ID 40179982Set of 2 × angled and 2 × straight 3/16" hose ID 40217728Set of 2 × angled and 2 × straight 1/4" hose ID 40217736Set of 2 × angled 4 mm and 2 × 1/4" hose ID 40217744Set of 2 × straight 4 mm and 2 × 1/4" hose ID 40217752Straight, 3/16" hose ID with restrictor 40241491Straight, 1/4" hose ID with restrictor 40241513Angled, 3/16" hose ID with restrictor 40241483Angled, 1/4" hose ID with restrictor 40241505

Cable gland M12 A2G-15 Brass, G1/8B x 1/4" pipe ID 40141241Compression fitting A2G-10, A2G-15 Brass, G1/8B x 1/4" pipe ID 40232867

Combi tube connection A2G-10, A2G-15 Brass, G1/8B x 1/4" pipe ID up to 5/16" hose ID 40232484

Tubing

A2G-05, A2G-10, A2G-15, A2G-30, A2G-40, A2G-50 75 ft roll PVC tube 3/16" tube ID 40217841

A2G-10, A2G-15 75 ft roll PVC tube 1/4" tube ID 40217850A2G-10, A2G-15, A2G-30, A2G-40, A2G-50, A2G-55, A2G-60, A2G-70, A2G-80

75 ft roll Silicone tube 3/16" tube ID 40208940

A2G-10, A2G-15 75 ft roll Silicone tube 1/4", 3/16" tube ID 40208958

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air2guide accessories

Description Model Specifications E-No.

Case mounting screws

A2G-05, A2G-10, A2G-15 Flat head screw 4.2 × 16 40180018A2G-30 Slotted pan head screw 4.8 × 50 ST VZN 40213081A2G-25, A2G-40, A2G-50, A2G-55 Slotted pan head screw 3.9 × 19 ST VZN 40213072

Mounting flangeA2G-60 Plastic black 40212360A2G-70 Plastic black 40212351

Static pressure tips A2G-10, A2G-15

¼" hose barb, 4" extension length 40232956¼" hose barb, 6" extension length 40232964¼" hose barb, 8" extension length 40232972⅛" to ¼" hose barb, 4" extension length 40232981⅛" to ¼" hose barb, 6" extension length 40232999⅛" to ¼" hose barb, 8" extension length 40233006

Filling liquid 30 ml A2G-30 Display fluid red 0.786 kg/dm3 40213714Limitation labels (red/green) A2G-30 40213731Weather protection hood A2G-10, A2G-15 For air2guide built-in version 40241564

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WIKA Instrument, LPPressure and Temperature Measurement1000 Wiegand BoulevardLawrenceville, GA 30043Toll Free 1-888-WIKA-USA (945-2872)Tel (770) 513-8200 Fax (770) 338-5118www.wika.com/a2gB023 1,000 Rev 3 09/13 © Copyright 2013 WIKA Instrument, LP. All Rights Reserved.

With almost 70 years of experience, WIKA Instrument, LP is the leadingglobal manufacturer of pressure and temperature measurementinstrumentation, producing more than 43 million pressure gauges,diaphragm seals, pressure transmitters, thermometers and otherinstruments annually. WIKA’s extensive product line, includingmechanical and electronic instruments, provides measurementsolutions for any application in a large variety of industries. A globalleader in lean manufacturing and instrumentation experience, WIKA also offers a broad selection of stock and custom instrumentation as well as dedicated services to provide customers with the right solutions, at the right time, wherever they need us.

WIKA provides distinctive service and support to our channel partners and customers:• Award winning U.S.-based manufacturing, sales and ordering customer service and technical support • Certified technical specialists who conduct Best Practice Instrument Reviews with performance improvement reports• An in-house engineering team for product customization and innovation • Proven capabilities to connect with customer business processes for ordering and inventory management • Web-based customer service features, including RFQs, literature request and competitor product cross reference

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