About Selecting Temperature Sensors
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Thermocouple and RTD Connection Heads
Attach these heads to your thermocouple or RTD probe to protect wiring from dust and moisture. The removable cap makes it easy to access your wiring when you need. Install an optional terminal block inside the head to keep your wiring organized.
Hazardous location connection heads are rated for use in Class I, Divisions 1 and 2, Groups A, B, C, and D; Class II, Divisions 1 and 2, Groups E, F, and G; and Class III, Divisions 1 and 2 environments with flammable gases, combustible dust, and combustible fibers.
Probe Connection | Conduit Connection | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size  | Thread Type | Gender | Pipe Size | Thread Type | Gender | Includes | Environment | Environmental Rating | Each | |
Aluminum | ||||||||||
| 1/2 | NPT | Female | 3/4 | NPT | Female | Screw-On Cap with Retaining Chain | __ | __ | 00000000 | 000000 |
| 1/2 | NPT | Female | 3/4 | NPT | Female | Screw-On Cap with Retaining Chain | Hazardous Location | NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2 NEMA 4X | 00000000 | 000000 |
Cast Iron | ||||||||||
| 1/2 | NPT | Female | 3/4 | NPT | Female | Screw-On Cap with Retaining Chain | __ | __ | 00000000 | 00000 |
Plastic | ||||||||||
| 1/2 | NPT | Female | 3/4 | NPT | Female | Hinged Cap | __ | __ | 00000000 | 00000 |
| 1/2 | NPT | Female | 3/4 | NPT | Female | Screw-On Cap with Retaining Chain | __ | __ | 00000000 | 00000 |
Stainless Steel | ||||||||||
| 1/2 | NPT | Female | 3/4 | NPT | Female | Screw-On Cap with Retaining Chain | __ | __ | 00000000 | 000000 |
| 1/2 | NPT | Female | 3/4 | NPT | Female | Screw-On Cap with Retaining Chain | Hazardous Location | NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2 NEC Zone 1 Groups IIC, IIB, IIA NEC Zone 21 Groups IIIC, IIIB, IIIA IEC Zone 1 Groups IIC, IIB, IIA IEC Zone 21 Groups IIIC, IIIB, IIIA IP66 | 00000000 | 000000 |
Cut-to-Length RTD Probes for Liquids and Gases
For a perfect fit in a thermowell, trim these probes with a pipe cutter. Stainless steel protects the sensing element from impact and liquids when they’re immersed. They are often installed in a bore to measure the temperature of molds, dies, and other equipment.
Probe | Wire | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RTD Type | Temperature Range, ° F | Lg. | Dia. | Cuttable Lg. | Accuracy | Response Time, sec. | Connection Type | Sensing Tip Lg. | Sensing Element Material | Lead Lg. | Gauge | No. of Wires | Each | |
304 Stainless Steel Probe | ||||||||||||||
| 100 ohms | -55° to 400° | 12" | 3/16" | 8 1/2" | ±0.12% | 2 | Wire Leads | 3" | Platinum | 6" | 24 | 3 | 000000000 | 0000000 |
| 100 ohms | -55° to 400° | 12" | 1/4" | 8 1/2" | ±0.12% | 4.4 | Wire Leads | 3" | Platinum | 6" | 24 | 3 | 000000000 | 000000 |
| 100 ohms | -55° to 400° | 24" | 3/16" | 20 1/2" | ±0.12% | 2 | Wire Leads | 3" | Platinum | 6" | 24 | 3 | 000000000 | 000000 |
| 100 ohms | -55° to 400° | 24" | 1/4" | 20 1/2" | ±0.12% | 4.4 | Wire Leads | 3" | Platinum | 6" | 24 | 3 | 00000000 | 000000 |
| 100 ohms | -55° to 400° | 48" | 1/4" | 44 1/2" | ±0.12% | 4.4 | Wire Leads | 3" | Platinum | 6" | 24 | 3 | 00000000 | 000000 |
| 100 ohms | -55° to 400° | 72" | 1/4" | 68 1/2" | ±0.12% | 4.4 | Wire Leads | 3" | Platinum | 6" | 24 | 3 | 000000000 | 000000 |
| 100 ohms | -55° to 400° | 96" | 1/4" | 92 1/2" | ±0.12% | 4.4 | Wire Leads | 3" | Platinum | 6" | 24 | 3 | 000000000 | 000000 |
| 100 ohms | -55° to 900° | 12" | 3/16" | 8 1/2" | ±0.12% | 2 | Wire Leads | 3" | Platinum | 6" | 24 | 3 | 000000000 | 000000 |
| 100 ohms | -55° to 900° | 12" | 1/4" | 8 1/2" | ±0.12% | 4.4 | Wire Leads | 3" | Platinum | 6" | 24 | 3 | 000000000 | 000000 |
| 100 ohms | -55° to 900° | 24" | 3/16" | 20 1/2" | ±0.12% | 2 | Wire Leads | 3" | Platinum | 6" | 24 | 3 | 000000000 | 000000 |
| 100 ohms | -55° to 900° | 24" | 1/4" | 20 1/2" | ±0.12% | 4.4 | Wire Leads | 3" | Platinum | 6" | 24 | 3 | 00000000 | 000000 |
| 100 ohms | -55° to 900° | 48" | 1/4" | 44 1/2" | ±0.12% | 4.4 | Wire Leads | 3" | Platinum | 6" | 24 | 3 | 00000000 | 000000 |
Dual-Output Cut-to-Length RTD Probes for Liquids and Gases
Output temperature readings to two devices, or in applications where you want to output temperature readings to two different devices. For example, the output from one thermocouple might be fed to a data logger, while the output from the other thermocouple is used for process control.
Probe | Wire | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RTD Type | Temperature Range, °F | Lg. | Dia. | Cuttable Lg. | Accuracy | Response Time, sec. | Connection Type | Sensing Tip Lg. | Sensing Element Material | Lead Lg. | Gauge | No. of Wires | Each | |
304 Stainless Steel Probe | ||||||||||||||
| 100 ohms | -55° to 400° | 12" | 1/4" | 8 1/2" | ±0.12% | 4.4 | Wire Leads | 3" | Platinum | 6" | 24 | 6 | 000000000 | 0000000 |
| 100 ohms | -55° to 400° | 24" | 1/4" | 20 1/2" | ±0.12% | 4.4 | Wire Leads | 3" | Platinum | 6" | 24 | 6 | 000000000 | 000000 |
| 100 ohms | -55° to 900° | 12" | 1/4" | 8 1/2" | ±0.12% | 4.4 | Wire Leads | 3" | Platinum | 6" | 24 | 6 | 000000000 | 000000 |