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
Wire, Gasket, & Lug Thermocouples
Wire Thermocouples are commonly used in applications where a load temperature or surface temperature is being monitored. These thermocouples and are available in every thermocouple type and insulation material selection. Stainless steel overbraid or other armor can be added as desired by the customer.
Wire thermocouples can be mounted to a pipe or surface structure by means of a pipe clamp, ring terminal, bolt gasket, spade lug or shim. For profiling an internal temperature, they can be installed through a multiconductor feedthrough [ex: 6-9] or otherwise mounted for load temperature measurements. These features enable simple installation on a cost effective basis.
A special type of wire thermocouple used primarily for validation of pharmaceutical and autoclave applications is the extremely accurate Type T thermocouple from JMS. That thermocouple type is addressed in its own section which can be found here. (DWG16238)
Another special wire thermocouple type that is set out separately is the Wire style Bearing Sensor which is popular in bearings (of course) as well as autoclaves where a hermetically sealed sleeve to mate with a feedthrough is needed. (Ex Series 1P).
- Thermocouple Type Material & Color Code
- Thermocouple Limits of Error and Published Range For Bare Wire
- Thermocouple Sheath Material Temperature Limits
- Thermocouple Temperature Limits By Sheath Diameter
| 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 |
| 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.
| 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
| 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°) |
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