MegopaK Thermocouples

Assembly with screw cover head

0 0 1 - 1 5 9

Assembly with insulated wire extension

Assembly with miniature aluminum head

Assembly with armor cable extension

Figure 1 — Megapak Assembles

MegopaK Termocouple are used forFunction

sensing temperatures from –200° to1093°C (–300° to 2000°F).

DescriptionMegopaK is a combination of thermo-couple wires, mineral insulation, and aProtecting sheath pressed into a solidmass of small diameter.

A.

B.

C.

tecting sheath,

Bulk Material – the basic combina-tion of wires, insulation, and pro-

Elements - consisting of the basiccombination with the wires weldedto form a measuring junction (threetypes of junctions are available),

Assemblies - complete thermocou-pies consisting of elements plus ter-minations (heads, plugs, jacks) andmounting attachments (Figures 1and 2).

21-75-03-0612/97Page 1 of 4

Specification

Screw cover head

Miniature terminal block

Miniature aluminum head

QuiK-Konnect plug and jack

General purpose head

Figure 2 — Terminations

AccessoriesMounting attachments (compression fit-tings in 1/8, 1/4 or 1/2 inch NPT),

Brass or 316 stainless steel (notreadjustable),

303 stainless steel (readjustable).These thermocouples are supplied inthree forms:

Specification21-75-03-06Page 2

SpecificationsInsulation Composition 99% magnesium oxide (minimum); 0.001% boron.

Insulation Resistance(minimum)

2 megohms at 500 Vdc for 7.62 metre (25 foot) length at room temperature.

Sheath Material Type 310, 316 or 446 stainless steel or Inconel.

Sheath Length Any length up to 15.25 metres (50 foot) in increments of 25 mm (1 -inch).

Bending Radius

Speed of Response

One sheath diameter (minimum).

The time for test thermocouples to respond to 63.2°/0 of a step change in temperature.

Speed of Response (Seconds)

Type of Junction mm

1.63.24.86.49.5

1.7

1.63.24.86.49.5

From Room Temp.to Salt Bath at427°C (800°F)

0.31.13.03.87.3

0.10.10.2

0.2

0.82.8

9.517.6

From Still Air at 93°C(200°F) to Still Air at815°C (1500°C)

9.016.023.032.344.5

8.313.021.027.027.5

9.722.031.542.076.0

Sheath Diameter From Room Temp.to 100°C (212°F)

0.20.71.5

2.8

0.10.10.10.10.1

0.8

4.87.813.5

inch

Integral(Grounded)

0.0630.1250.1880.2500.375

Exposed 0.0630.1250.1880.2500.375

0.0630.1250.1880.2500.375

0.2

Remote(Insulated)

1.63.24.86.49.5

2.27.8

Calibration Accuracy Typeof Wire

Type T

Limit of Error(whichever is greater)

Limit of Error(whichever is greater)

TemperatureRange

0 to 900°C32 to 1600° F

TemperatureRange

–200 to 0°C0 to 350°C–300 to 32°F32 to 700°F

0 to 750°C

Typeof Wire

±1°C or ±1.5%±1°C or ±0.75%±1.5°F or ±2%±1.5°F or ±0.75%

±2.2°C or ±0.75%

Type E ±1 .7°C or ±0.5%±3°F or ±0.5%

±2.2°C or ±0.75%±4°F or ±0.75%

Type K 0 to 1093°C32 to 2000° F

Type J32 to 1400°F±4°F or ±0.75%

NOTE: When the limit of error is given in % the percentage applies to the temperature beingmeasured, not the range.

Sheath DiameterRecommended MaximumLong-Term ServiceTemperatures 3,2 mm

(0.125”)371°F700°F

760°C1400°F

871°C

4,8 mm(0.188”)

6,4 mm(0.250”)

9,5 mm(0.375”)

1,6 mm(0.063”)Material315°CType T — — —

760°C1400°F

871°C1600°F

600°F871°C1600°F

871°C1600°F

Type J 649°C1200°F

982°C1800°F

982°C1800°F

Type K 871°C1600°F 1600°C

— — 871°C 927°C1700°F

Type E —1600°F

Specification21-75-03-06

Page 3

Ordering Information1. For Bulk MegopaK Material, select

model number from Table 1, andspecify length in inches. Longestlength available depends on sheathdiameter. Example: 2T1 Ml 5-60 =Type T with 316 SS sheath 1.6 mm(0.063”) diameter and 60 incheslong.

TABLE I - MEGOPAK BULK MATERIAL

2. For Thermocouple Elements,select model number from Table Ifollowed by a letter selection fromTable II plus desired length equal tothe specified length plus 2 inches (51mm) of exposed bare thermocouplewire.Example: 2K3M22-R48 = Type Kwith Inconel sheath 4.8 mm (0.1 88”)diameter, remote junction and 48inches long.

3. For Assemblies, select modelnumber from Table I followed by a let-ter selection from Table II plusdesired length of element in inchesand the cold end terminationdesignation from Table Ill. If mountingattachments and wire extension ter-minations are needed, make selec-tions from Tables IV and V. Select therequired length of insulated extensionwire in inches from Table VI.Example: 2J1Ml5-G24-9S-D12-3W2J36 = Type J with 316 SSsheath 1.6 mm (0.063”) diameter in-tegral junction, 24 inch sheathlength, 12-inch wire extension length,316 SS compression fitting, 20 gaugeinsulated extension wire with fibre-glass insulation, QuiK-Konnect jacktermination on extension wire.

Sheath Diamter

Element Sheath Material 1.6 mm (0.063”) 3.2 mm (0.125”) 4.8 mm (0.188”) 6.4 mm (0.250”) 9.5 mm (0.375”)

Type T 316 Stainless Steel 2T1M15 2T2M15 – — —

Type J Inconel 2J1M22 2J2M22 2J3M22 2J4M22 2J6M22Type J 310 Stainless Steel 2J1M14 2J2M14 2J3M14 2J4M14 2J6M14Type J 316 Stainless Steel 2J1M15 2J2M15 2J3M15 2J4M15 2J6M15Type J 446 Stainless Steel — — — 2J4M20 2J6M20

Type K Inconel 2K1M22 2K2M22 2K3M22 2K4M22 2K6M22Type K 310 Stainless Steel 2K1M14 2K2M14 2K3M14 2K4M14 2K6M14Type K 316 Stainless Steel 2K1M15 2K2M15 2K3M15 2K4M15 2K6M15Type K 446 Stainless Steel – — — 2K4M20 2K6M20

Type E 316 Stainless Steel — — 2E3M15 2E4M15 –

Other types including special sheathing, 4 wire (duplex) type, and special calibrations are available on a special productbasis. Consult Customer Service Department, Honeywell, Fort Washington, PA for complete information.

TABLE II - TYPES OF MEASURING JUNCTIONSSpecifyJunctionSymbol

G *

E*

Description

Junction welded to tip of sheath provides faster response timethan Type R junction.

Sheath end is left open. Wires are welded and exposed for alength of one sheath diameter. Sheath end is sealed with cement.Seal is effective up to 538°C (1OOO° F).

R* Junction is insulated from sheath.

*Add length in inches.

Specification21-75-03-06Page 4

TABLE Ill - COLD END TERMINATIONS

Type Specify

Heads -1

-3

-4

-11*3,2

1 2 *

Terminal -13*

6,4

Block-14*

Plug orJack -6*

-5*

Insulated -8†Wire -9†Extension

-10†

DescriptionGeneral Purpose Head with 1/2”NPT conduit connectionScrew cover head with 1/2” NPTconduit connectionScrew cover head with 3/4” NPTconduitMiniature Aluminum Head withoutmounting bushingMiniature Aluminum Head with1/4” NPT mounting bushingMiniature Terminal Block withoutmounting bushingMiniature Terminal Block with1/4” NPT mounting bushing

QuiK-Konnect PlugQuiK-Konnect JackInsulated Wire ExtensionInsulated Wire Extension, armoredtubing

Insulated Wire Extension, with ar-mored tubing and junction boxconnector

*Not available with 9.5mm (0.375”) O.D. sheath.†These items require selections from Tables V and VI. Maximumtemperature rating for standard transition sealant is 204°C(400°F).

TABLE VI - INSULATED EXTENSION WIRE

Ordering Number*

TABLE IV - MOUNTING ATTACHMENTS(COMPRESSION FITTINGS)

Used WithTube Size Mounting

ThreadSpecify Material mm inch (NPT)

R* Brass 1,6 0.063 1/8(not readjustable)

S* 316 S.S. 0.125 1/8(not readjustable) 4,8 0.188 1/8

T† 303 S.S. 0.250 1/4(readjustable). 9,5 0.375 1/2

*Fitting is assembled loosely on sheath and can be adjusted as re-quired. After tightening, fitting cannot be relocated.†Fitting can be readjusted on sheath at any time.

TABLE V - WIRE EXTENSION TERMINATIONS

Specify

A*

B*C*D*

Description

No end terminal . . . wiresbared 13 mm (0.5 in)Spade lug terminalsQuiK-Konnect PlugQuiK-Konnect Jack

Available only withTable IllDesignations

8,9,10

8,9,108, 98, 9

*Specify desired length of extension wire, in 152 mm (6-inch) in-crements. Minimum length: 305 mm (12 inches).

Maximum TemperatureLimits**

Wire Size(B&S

Type J Type K Type T Type E Insulation °C °F Qualifications Gauge)

3W2P6 5W2P16 1W2P6 — Polyvinyl over 105° 221° Underground; indoor 20Polyvinyl or outdoor conduit;

where exposed to oils,chemicals, acids, etc.

9B3N4 — 9B1N4 — Nylon -46 to -50 to Not to be used in con- 24160° 320° duits or out-of-doors

AOOOO Fibre Glass - 482° 900° Primarily for high 20—JOOOO Silicone temperature usew/Metal Impregnated 24BraidROOOOw/Armor

C0000 — Teflon 204° 400° Resists most acids 20LOOOO and vaporsw/MetalBraidTOOOOw/Armor

*Specify length of wire required in inches.**These limits apply to the insulation of the wire extension. The temperature at the transition between thermocouple and wireextension, however, must not exceed 204°C (400°F) unless specifically requested.

Specifications are subject to change without notice.