Industries
Industries
- General Industrial
- Aerospace
- Brick & Ceramics
- Chemical & Petrochemical
- Pharmaceutical, Food, Dairy, & Beverage
- Engineering & Architecture (EPC Firms) & Major Equipment OEMs
- Glass
- Incineration
- Metals Manufacturing & Heat Treating
- OEM & Equipment Builders
- Oil & Gas - Downstream & Refining
- Oil & Gas Upstream and Midstream
- Plastics & Fiber / Textiles Industries
- Power
- Pulp & Paper
- Rubber, Cement, & Aggregate
- Semiconductor
- Test & Measurement
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Industrial & Miniature Thermocouples
Industrial & Miniature Thermocouples describes an incredibly wide and diverse array of thermocouples that can be used for all manner of industrial applications. These thermocouples are all constructed from swaged mineral insulated cable which makes them extremely rugged and provides excellent protection from process conditions.
Miniature and industrial thermocouples range in size from 1/2" to 0.010". JMS builds all of its thermocouples to order and only the most common options are set out here. If there are characteristics you do not see called out, just use an "X" for that character in the part # and call out your special requirement at the end of the part #. If you can draw it, we can build it.
- Thermocouple Type Material & Color Code
- Thermocouple Temperature Limits By Sheath Diameter
- Thermocouple Sheath Material Temperature Limits
- Thermocouple Limits of Error and Published Range For Bare Wire
| Thermocouple Type | Material | Magnetic | ASTM Color Coding | IEC Color Coding |
| J | Iron Constantan | Yes No |
White Red |
White Black |
| T | Copper Constantan | No No |
Blue Red |
White Brown |
| K | Chromel Alumel | No No |
Yellow Red |
White Green |
| E | Chromel/Constantan | No No |
Purple Red |
White Violet |
| P | Platinel | N/A | N/A | N/A |
| S | Platinum 10% Rhodium Pure Platinum | No No |
Black Red |
White Orange |
| R | Platinum 13% Rhodium Pure Platinum | No No |
Black Red |
white Orange |
| B | Platinum 30% Rhodium Platinum 6% Rhodium | No No |
Grey Red |
White Grey |
| N | Nicrosil/Nisil | No Slightly |
Orange Red |
White Pink |
| C | Tungsten 5% Rhenium/ Tungsten 26% Rhenium | No No |
White Red |
N/A |
| Suggested Upper Limit for Outside Diameter (Single Element) °C (°F) | ||||||
|---|---|---|---|---|---|---|
| Sheath | Thermocouple Type | |||||
| In | mm | T | J | E | K | N |
| 1/25" | 1.0 | 260° (500°) | 260° (500°) | 300° (570°) | 700° (1290°) | 2700° (1290°) |
| 1/16" | 1.6 | 260° (500°) | 440° (825°) | 510° (950°) | 920° (1690°) | 920° (1690°) |
| 1/8" | 3.2 | 315° (600°) | 520° (970°) | 650° (1200°) | 1070° (1950°) | 1070° (1950°) |
| 3/16" | 4.8 | 370° (700°) | 620° (1150°) | 730° (1350°) | 1150° (2100°) | 1150° (2100°) |
| 1/4" | 6.3 | 370° (700°) | 720° (1330°) | 820° (1510°) | 1150° (2100°) | 1150° (2100°) |
| 3/8" | 9.5 | 370° (700°) | 720° (1330°) | 820° (1510°) | 1150° (2100°) | 1150° (2100°) |
| Material Symbol |
Sheath Material |
Melting Point(°F) |
Max Temp; In Air(°F) |
Atmosphere* |
|---|---|---|---|---|
| H | 304 SS | 2550 | 1650 | ORNV |
| J | 310 SS | 2550 | 2100 | ORNV |
| L | 316L SS | 2550 | 1650 | ORNV |
| O | 446 SS | 2700 | 2100 | ORNV |
| M | Inconel 600 | 2500 | 2100 | ONV |
| P | Inconel 702 | 2620 | 1500 | ONV |
| Q | Platinum | 3216 | 3000 | ON |
| R | Molybdenum | 4750 | 1000 | VNR |
| T | Titanium | 3300 | 600 | V |
| V | STABALOY | 2552 | 2220 | ORNV |
*KEY
O=Oxidizing, R=Reducing, N=Neutral, V=Vacuum
| ANSI Thermocouple Type | Temp Range (°C) | Temp Range (°F) | Standard Limits of Error (°C)* | Special Limits of Error (°C) |
|---|---|---|---|---|
| J | 0 to 760 | 32 to 1400 | The greater of ±2.2 or ±0.75% | The greater of ±2.2 or ±0.75% |
| T | 0 to 370 | 32 to 700 | The greater of ±1 or ±0.75% | The greater of ±0.5 or ±0.4% |
| K | 0 to 1260 | 32 to 2300 | The greater of ±2.2 or ±0.75% | The greater of ±1.1 or ±0.4% |
| E | 0 to 870 | 32 to 1600 | The greater of ±1.7 or ±0.5% | The greater of ±1 or ±0.4% |
| S | 0 to 1480 | 32 to 2700 | The greater of ±1.5 or ±0.25% | The greater of ±0.6 or ±0.1% |
| R | 0 to 1480 | 32 to 2700 | The greater of ±1.5 or ±0.25% | The greater of ±0.6 or ±0.1% |
| N | 0 to 1246 | 32 to 2300 | The greater of ±2.2 or ±0.75% | The greater of ±1.1 or ±0.4% |
| B | 870 to 1700 | 1600 to 3100 | ±0.5% | ±0.25% |
| TA | -200 to 0 | -328 to 32 | The greater of ±1 or ±1.5% | B |
| EA | -200 to 0 | -328 to 32 | The greater of ±1.7 or ±1% | B |
| KA | -200 to 0 | -328 to 32 | The greater of ±2.2 or ±2% | B |
A: Thermocouple and thermocouple materials are normally supplied to meet the tolerances specified in the table of temperatures above 0°C. The same materials, however, may not fall within the tolerances given for temperatures below 0°C in the normal section in the table. If materials are required to meet the tolerances stated for temperatures below 0°C the purchase order must specifically state that requirement. Selection of materials will usually be required.
B: Special tolerances for temperatures below 0°C are difficult to justify due to limited available information.
*: Standard and special limits of error in °F are 1.8 times larger thant the °C tolerance at the equivalent °C temperature.
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