About Selecting Temperature Sensors
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Threaded RTD Probes with Thermowell for Liquids and Gases
To protect against vibration and shock during temperature measurements, these RTD probes come with a thermowell. Made of stainless steel, it acts as a shield for added protection from corrosion in liquids and gases. The thermowell also lets you replace the probe sensor without stopping flow or draining your system. For accurate readings, a spring pushes the probe tip forward, keeping the tip in constant contact with the thermowell. Rated IP65 and NEMA 4, these probes seal out dust and water from washdowns. Remove the cap on the head to wire the probe’s terminal block to your application.
Probe | Thermowell Connection | Conduit Connection | Material | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RTD Type | Temperature Range, °F | Lg. | Dia. | Accuracy | Response Time, sec. | Connection Type | Pipe Size  | Thread Type | Gender | Pipe Size | Thread Type | Gender | Overall Lg. | Head | Fitting | Each | |
304 Stainless Steel Probe and Thermowell | |||||||||||||||||
| 100 ohms | -55° to 400° | 6" | 1/2" | ±0.12% | 30 | Screw Terminal | 3/4 | NPT | Male | 3/4 | NPT | Female | 14 1/8" | Cast Iron | Iron | 0000000 | 0000000 |
| 100 ohms | -55° to 400° | 9" | 1/2" | ±0.12% | 30 | Screw Terminal | 3/4 | NPT | Male | 3/4 | NPT | Female | 17 1/8" | Cast Iron | Iron | 0000000 | 000000 |
| 100 ohms | -55° to 400° | 12" | 1/2" | ±0.12% | 30 | Screw Terminal | 3/4 | NPT | Male | 3/4 | NPT | Female | 20 1/8" | Cast Iron | Iron | 0000000 | 000000 |
RTD Probes for Liquids and Gases
Obtain more precise and reliable liquid and gas temperature measurements than thermocouple probes. Some of these probes meet DIN standards for accuracy, meaning they’re precise even with fast temperature changes.
IP68- and IP69K-rated probes have plug connections that can handle brief submersion and harsh washdowns.
For technical drawings and 3-D models, click on a part number.
Probes | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Probe | Cables | ||||||||||
| RTD Type | Temperature Range, °F | Lg. | Dia. | Accuracy | Response Time, sec. | Environmental Rating | Specifications Met | Each | Each | ||
4-Pin Micro M12 Plug Connection—316L Stainless Steel Probe | |||||||||||
| 100 ohms | -40° to 300° | 2" | 1/4" | ±0.1% | 3 | IP68, IP69K | DIN EN 60751 Class A | 0000000 | 0000000 | 0000000 | 000000 |
| 100 ohms | -40° to 300° | 2 3/4" | 1/4" | ±0.1% | 3 | IP68, IP69K | DIN EN 60751 Class A | 0000000 | 000000 | 0000000 | 00000 |
| 100 ohms | -40° to 300° | 3 7/8" | 1/4" | ±0.1% | 3 | IP68, IP69K | DIN EN 60751 Class A | 0000000 | 000000 | 0000000 | 00000 |
| 100 ohms | -40° to 300° | 5 7/8" | 1/4" | ±0.1% | 3 | IP68, IP69K | DIN EN 60751 Class A | 0000000 | 000000 | 0000000 | 00000 |
| 100 ohms | -40° to 300° | 6 1/4" | 3/8" | ±0.1% | 3 | IP68, IP69K | DIN EN 60751 Class A | 0000000 | 000000 | 0000000 | 00000 |
| 100 ohms | -40° to 300° | 7 7/8" | 1/4" | ±0.1% | 3 | IP68, IP69K | DIN EN 60751 Class A | 0000000 | 000000 | 0000000 | 00000 |
| 100 ohms | -40° to 300° | 9 7/8" | 1/4" | ±0.1% | 3 | IP68, IP69K | DIN EN 60751 Class A | 0000000 | 000000 | 0000000 | 00000 |
| 100 ohms | -40° to 300° | 10 1/4" | 3/8" | ±0.1% | 3 | IP68, IP69K | DIN EN 60751 Class A | 0000000 | 000000 | 0000000 | 00000 |
| 100 ohms | -40° to 300° | 13 3/4" | 1/4" | ±0.1% | 3 | IP68, IP69K | DIN EN 60751 Class A | 0000000 | 000000 | 0000000 | 00000 |
| 100 ohms | -40° to 300° | 14 1/8" | 3/8" | ±0.1% | 3 | IP68, IP69K | DIN EN 60751 Class A | 0000000 | 000000 | 0000000 | 00000 |
| 100 ohms | -40° to 300° | 22" | 3/8" | ±0.1% | 3 | IP68, IP69K | DIN EN 60751 Class A | 0000000 | 000000 | 0000000 | 00000 |
| 1,000 ohms | -40° to 300° | 6 1/4" | 1/4" | ±0.1% | 3 | IP68, IP69K | DIN EN 60751 Class A | 0000000 | 000000 | 0000000 | 00000 |
| 1,000 ohms | -40° to 300° | 6 1/4" | 3/8" | ±0.1% | 3 | IP68, IP69K | DIN EN 60751 Class A | 0000000 | 000000 | 0000000 | 00000 |
| 1,000 ohms | -40° to 300° | 10 1/4" | 1/4" | ±0.1% | 3 | IP68, IP69K | DIN EN 60751 Class A | 0000000 | 000000 | 0000000 | 00000 |
| 1,000 ohms | -40° to 300° | 10 1/4" | 3/8" | ±0.1% | 3 | IP68, IP69K | DIN EN 60751 Class A | 0000000 | 000000 | 0000000 | 00000 |
| 1,000 ohms | -40° to 300° | 14 1/8" | 1/4" | ±0.1% | 3 | IP68, IP69K | DIN EN 60751 Class A | 0000000 | 000000 | 0000000 | 00000 |
| 1,000 ohms | -40° to 300° | 14 1/8" | 3/8" | ±0.1% | 3 | IP68, IP69K | DIN EN 60751 Class A | 0000000 | 000000 | 0000000 | 00000 |
| 1,000 ohms | -40° to 300° | 22" | 3/8" | ±0.1% | 3 | IP68, IP69K | DIN EN 60751 Class A | 0000000 | 000000 | 0000000 | 00000 |
Threaded RTD Probe Transmitters for Liquids and Gases
Send temperature readings directly to programmable logic controllers (PLCs)—with a built-in 4-20mA transmitter, these RTDs don’t require a separate signal converter. They have an NPT male probe connection, so they’re ready to screw into thermowells and other fittings on pipe and tanks. Made of 316 or 316L stainless steel, they resist corroding from harsh cleaning chemicals. This stainless steel also protects the RTD sensor inside from impact. They are also often installed in bores to measure the temperature of molds and dies. CE marked, they meet European safety standards.
Fixed RTDs can be used directly in liquid or steam because they’re welded to their fitting for a liquid-tight seal.
RTDs with IO Link let you remotely adjust settings, read measurements, and receive error messages when connected to a PLC via an IO Link controller (not included). These RTDs meet DIN EN 60751 Class A standards for temperature accuracy. UL and C-UL listed, they meet American and Canadian safety standards.
For technical drawings and 3-D models, click on a part number.
Probe | Probe Connection | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RTD Type | Lg. | Dia. | Accuracy | Pipe Size | Thread Type | Gender | DC Voltage | Max. Pressure, psi | Output Current | Overall Lg. | Fitting Material | Choose a Temperature Range | Each | |
Fixed 316 Stainless Steel Probe with Plastic Head (IP65) | ||||||||||||||
| 100 ohms | 1 3/4" | 1/4" | ±0.5% | 1/2 | NPT | Male | 10-30 | 725 | 4-20mA | 5 3/4" | 316 Stainless Steel | 000000 | 0000000 | |
| 100 ohms | 3 1/4" | 1/4" | ±0.5% | 1/2 | NPT | Male | 10-30 | 725 | 4-20mA | 7 1/4" | 316 Stainless Steel | 000000 | 000000 | |
| 100 ohms | 5 1/4" | 1/4" | ±0.5% | 1/2 | NPT | Male | 10-30 | 725 | 4-20mA | 9 1/4" | 316 Stainless Steel | 000000 | 000000 | |
| 100 ohms | 8 1/4" | 1/4" | ±0.5% | 1/2 | NPT | Male | 10-30 | 725 | 4-20mA | 12 1/4" | 316 Stainless Steel | 000000 | 000000 | |
| 100 ohms | 11 1/4" | 1/4" | ±0.5% | 1/2 | NPT | Male | 10-30 | 725 | 4-20mA | 15 1/4" | 316 Stainless Steel | 0000000 | 000000 | |
Probe Transmitters | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Probe | Probe Connection | Cables with Socket | ||||||||||||||||
| RTD Type | Lg. | Dia. | Accuracy | Response Time, sec. | Pipe Size | Thread Type | Gender | DC Voltage | Max. Pressure, psi | Output Current | Communication Protocol | Overall Lg. | Fitting Material | Temp. Range, °F | Each | Each | ||
Fixed 316L Stainless Steel Probe (IP67, IP68, IP69K) | ||||||||||||||||||
| 1,000 ohms | 11/16" | 1/4" | ±0.5% | 3 | 1/2 | NPT | Male | 18-32 | 5,800 | 4-20mA | IO Link | 4 1/8" | 316L Stainless Steel | 0° to 300° | 0000000 | 0000000 | 0000000 | 000000 |
| 1,000 ohms | 1 1/2" | 1/4" | ±0.5% | 3 | 1/2 | NPT | Male | 18-32 | 4,350 | 4-20mA | IO Link | 5" | 316L Stainless Steel | 0° to 300° | 0000000 | 000000 | 0000000 | 00000 |
| 1,000 ohms | 3 1/2" | 1/4" | ±0.5% | 3 | 1/2 | NPT | Male | 18-32 | 4,350 | 4-20mA | IO Link | 7" | 316L Stainless Steel | 0° to 300° | 0000000 | 000000 | 0000000 | 00000 |
| 1,000 ohms | 5 7/16" | 1/4" | ±0.5% | 3 | 1/2 | NPT | Male | 18-32 | 4,350 | 4-20mA | IO Link | 8 7/8" | 316L Stainless Steel | 0° to 300° | 0000000 | 000000 | 0000000 | 00000 |
Sanitary RTD Probe Transmitters with Digital Display for Liquids and Gases
Check the temperature of liquids in hygienic applications such as food or pharmaceutical lines and tanks. Certified by 3-A to meet sanitary design standards, the parts of these probes that will touch liquid are highly polished to minimize spots where bacteria could grow. They're made of stainless steel, so they won't corrode from harsh cleaners and sanitizers. The housing is IP69K rated, meaning it withstands high-pressure, high-temperature washdowns that are common in hygienic cleaning practices. They have a flange that will connect to sanitary quick-clamp fittings (also known as tri-clamp fittings); they're easy to connect and remove from your line.
Program these probes with the touch screen, and select one of three colors as a visual alert for events in your process such as irregular or fluctuating temperatures. The head swivels 345° and the face rotates all the way around, so you can mount the sensor at any angle and still see the display. To trigger actions in your process line, connect these probes to remote displays, programmable logic controllers (PLCs), and other control equipment with the M12 plug. These probes meet DIN EN 60751, an industry standard for accuracy. They’re also CE marked, meaning they meet European Union safety standards.
For technical drawings and 3-D models, click on a part number.
Probe | Probe Transmitters | Cables with Socket | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RTD Type | Temperature Range, °F | Lg. | Dia. | Flange OD | Accuracy | Response Time, sec. | Plug Type | DC Voltage | Max. Pressure, psi | Output Current | Overall Lg. | Each | Each | ||
316L Stainless Steel Probe with 304 Stainless Steel Head (IP69K) | |||||||||||||||
For 1 1/2" Tube OD | |||||||||||||||
| 100 ohms | -55° to 480° | 2" | 5/16" | 1.988" | ±0.1% | 25 | 5-Pole Micro M12 | 8-35 | 580 | 4-20mA | 6 3/4" | 0000000 | 0000000 | 0000000 | 000000 |
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 | 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 | 0000000 |
Stainless Steel | ||||||||||
| 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 |