About Selecting Temperature Sensors
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Thermocouple Probes for Liquids and Gases
Made of stainless steel, these probes measure the temperature of liquids and gases without corroding. They’re also safe to use with solids, such as molds and dies, because the stainless steel acts as a shield if they’re hit or bumped. If space is tight, bend them up to 90°. They have a protective layer of magnesium oxide to keep the wiring inside the probe from kinking when they’re bent. Pick the thermocouple type that best covers the temperature range you expect your liquid, gas, or solid to be. You should also make sure the thermocouple type you choose is compatible with the device you plan to connect it to. They’re often used with temperature controllers, thermometers, and other temperature-reading devices.
These thermocouples are manufactured to conform to ASTM E230 for accuracy. Accuracy is how far off the reported value is from the actual temperature.
Probes without a cable have a connector already attached, so they’re ready to plug into a portable thermometer for temperature-monitoring on the go. You can also connect these probes to remote devices using thermocouple extension wire with connectors.
For technical drawings and 3-D models, click on a part number.
Probe | ||||||||
|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Response Time, sec. | Max. Temp., °F | Accuracy | Probe Material | Sensor Type | Each | |
Type J | ||||||||
Flat-Pin Mini Thermocouple Connector | ||||||||
| 36" | 1/8" | 0.6 | 970° | ±4° F between 32° to 533° F ±0.75% above 533° F | 316 Stainless Steel | Grounded | 000000000 | 000000 |
| 36" | 3/16" | 0.9 | 1150° | ±4° F between 32° to 533° F ±0.75% above 533° F | 316 Stainless Steel | Grounded | 00000000 | 00000 |
Round-Pin Thermocouple Connector | ||||||||
| 36" | 1/8" | 0.6 | 970° | ±4° F between 32° to 533° F ±0.75% above 533° F | 316 Stainless Steel | Grounded | 00000000 | 00000 |
| 36" | 3/16" | 0.9 | 1150° | ±4° F between 32° to 533° F ±0.75% above 533° F | 316 Stainless Steel | Grounded | 00000000 | 00000 |
| 36" | 1/4" | 1.3 | 1330° | ±4° F between 32° to 533° F ±0.75% above 533° F | 316 Stainless Steel | Grounded | 00000000 | 00000 |
Type K | ||||||||
Flat-Pin Mini Thermocouple Connector | ||||||||
| 36" | 1/8" | 0.6 | 1700° | Not Rated below 32° F ±4° F between 32° to 533° F ±0.75% above 533° F | 316 Stainless Steel | Grounded | 000000000 | 00000 |
| 36" | 3/16" | 0.9 | 1700° | Not Rated below 32° F ±4° F between 32° to 533° F ±0.75% above 533° F | 316 Stainless Steel | Grounded | 00000000 | 00000 |
Round-Pin Thermocouple Connector | ||||||||
| 36" | 1/8" | 0.6 | 1700° | Not Rated below 32° F ±4° F between 32° to 533° F ±0.75% above 533° F | 316 Stainless Steel | Grounded | 00000000 | 00000 |
| 36" | 3/16" | 0.9 | 1700° | Not Rated below 32° F ±4° F between 32° to 533° F ±0.75% above 533° F | 316 Stainless Steel | Grounded | 00000000 | 00000 |
| 36" | 1/4" | 1.3 | 1700° | Not Rated below 32° F ±4° F between 32° to 533° F ±0.75% above 533° F | 316 Stainless Steel | Grounded | 00000000 | 00000 |
High-Temperature Thermocouple Probes for Air and Surfaces
Thick wire with ceramic insulation stands up to extreme temperatures in forging, die casting, and heat treating. These probes have an exposed tip that's quick to respond to air and surface temperature changes but can't be used in liquids. Pick the thermocouple type that best covers the temperature range you expect the air or surface to be. You should also make sure the thermocouple type you choose is compatible with the device you plan to connect it to. They're often used with temperature controllers, thermometers, and other temperature-reading devices.
These probes are manufactured to conform to ASTM E230 for accuracy. Accuracy is how far off the reported value is from the actual temperature.
Note: When installing probes with wire leads, the red wire is negative.
Probe | Wire | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Response Time, sec. | Max. Temp., °F | Accuracy | Sensor Type | Lead Lg. | Gauge | Each | |
Type K | |||||||||
Wire Leads | |||||||||
| 36" | 1/4" | 5 | 2300° | Not Rated below 32° F ±4° F between 32° to 533° F ±0.75% above 533° F | Exposed | 1 1/2" | 14 | 0000000 | 000000 |
| 36" | 1/2" | 5 | 2300° | Not Rated below 32° F ±4° F between 32° to 533° F ±0.75% above 533° F | Exposed | 1 1/2" | 8 | 0000000 | 00000 |
Thermocouple Probes for Solids
Pierce pliable plastics, rubber, and other soft solids to check the internal temperature. Also known as penetration probes, these thermocouple probes have a stainless-steel housing with a narrow tip. They are often plugged into hand-held thermometers and have a handle for a comfortable grip. A coiled cable helps avoid tangles for neat and compact storage, while also allowing you to stretch it out when you need more reach. Pick the thermocouple type that best covers the temperature range you expect your solid to be. You should also make sure the thermocouple type you choose is compatible with the device you plan to connect it to.
These thermocouples are manufactured to conform to ASTM E230 for accuracy. Accuracy is how far off the reported value is from the actual temperature.
Insulated probes are filled with magnesium oxide for extra protection around the internal wires.
Probe | Cable | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Style | Lg. | Dia. | Response Time, sec. | Max. Temp., °F | Accuracy | Probe Material | Probe Insulation | Sensor Type | Lg., ft. | Material | Max. Temp., °F | Each | |
Type K | |||||||||||||
Flat-Pin Mini Thermocouple Connector | |||||||||||||
| 3 | 36" | 5/16" | 6 | 400° | Not Rated below 32° F ±4° F between 32° to 400° F | 304 Stainless Steel | Insulated | Grounded | 5 | Polyurethane Rubber | 220° | 0000000 | 0000000 |