Industries
Industries
- General Industrial
- Aerospace
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- 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
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- Rubber, Cement, & Aggregate
- Semiconductor
- Test & Measurement
Sintering, Furnace, & Glass Thermocouples
JMS manufactures many different designs for Sintering, Furnace and Glass Applications. This section details extremely high temperature thermocouples encased within an exotic alloy tube material such as Molybdenum, Platinum-Rhodium and Tantalum. These materials are common to glass applications and vacuum furnaces.
In the sintering and furnace industries these sensors are often requested with NIST traceable calibration certificates. Special designs not shown are available by design upon request.
- 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°) |
Resources
JMS Southeast, Inc.