Thermocouples consist of two dissimilar metal wires joined at a hot junction and generate a millivolt signal as the temperature changes. RTDs exhibit an increase in resistance as temperature rises. ProSense thermocouples and RTDs are available in a wide range of probe and installation styles.
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Two of the most commonly used temperature sensors in the automation industry are the resistance temperature detector (RTD) and the thermocouple.
Thermocouples work based on the Seebeck effect, a phenomenon where a small voltage is produced across a junction of two dissimilar metals when exposed to a temperature gradient. The amount of voltage produced within the thermocouple is very small, usually millivolts, and is directly related to the difference in temperature across the junction. There are many types of thermocouples, and each is represented by a letter. The most common ones are J, K, and T which designate a specific temperature range and the wires of each type are color coded to identify them.
RTDs are devices with an internal resistance that changes with temperature in a linear way. They are typically made from a very fine wire wrapped around a ceramic or glass core, or they can be created using thin film technology. The resistance in the wire will change as the temperature does, and by supplying a constant current, the measured voltage drop across this resistance can be used to determine the temperature. RTDs come in a variety of types, with the most common being a Pt100. It's made from platinum that has been calibrated to be 100 ohms at 0 °C. Platinum is an ideal metal for RTDs because of its stability, resistance to corrosion, and higher melting point. RTDs are great for applications up to around 600 °F.
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Thermocouple and RTD probes with IP66 NEMA 4X connection heads offer measuring ranges from -58 to 2100 °F.
Starting at
$69.00
(THMK-C06-02)
Spring-loaded probes ensure tip contact in thermowells for highly accurate temperature readings. Featuring IP66 NEMA 4X connection heads, these probes offer measuring ranges from -58 to 1700 °F.
Starting at
$76.00
(THMJ-C04-03)
Heat trace probes measure the surface temperature of process pipes to detect freeze-up or to help maintain the viscosity level needed for proper flow of the medium inside. These probes offer measuring ranges from -40 to 900 °F.
Starting at
$69.00
(THMJ-HT34-01)
Thermocouple and RTD probes with hex nipples allow easy probe replacement and connection to a junction box. These probes offer measuring ranges from -58 to 2100 °F.
Starting at
$47.50
(THMJ-H06L01-01)
Spring-loaded probes with hex nipples ensure tip contact in thermowells and allow easy probe replacement and connection to a junction box. These probes offer measuring ranges from -58 to 1700 °F.
Starting at
$51.00
(THMJ-H04L01-02)
Probes with an attached plug allow for quick and easy plug-in connections. These probes offer measuring ranges from -328 to 1700 °F.
Starting at
$24.50
(THMJ-P06-01)
Probes with heavy-duty 6 ft. lead wire transitions allow easy connection to RTD or thermocouple extension wire. These probes offer measuring ranges from -328 to 2100 °F.
Starting at
$38.00
(THMT-T06L06-01)
RTD probes with integral M12 cable connections are perfect for attaching mating temperature transmitters. These probes offer measuring ranges from -58 to 302 °F.
Starting at
$35.00
(RTD0100-06-010-H)
RTD probes with sanitary connections are designed for applications where corrosion and product contamination are factors and are used extensively in the food and beverage industry. These probes offer measuring ranges from -58 to 400 °F.
Starting at
$109.00
(RTD1-S15-030-H)
Flange mount probes are ideal for use with ovens, freezers, ducts, or any application where through-the-wall temperature sensing is required. These probes offer measuring ranges from -40 to 900 °F.
Starting at
$47.50
(THMJ-F06L06-01)
Probes with cuttable lengths provide utmost flexibility and can be trimmed to the required length of a specific application. These probes offer measuring ranges from -40 to 900 °F.
Starting at
$39.00
(THMJ-V24L06-01)
Melt-bolt probes measure the melt temperature of plastic as it moves down the barrel of an extruder or injection molding machine. These probes offer measuring ranges from -40 to 900 °F.
Starting at
$49.00
(THMJ-MB3T18-01)
Adjustable immersion sensors are designed to be inserted into the medium being measured. Used throughout all industries but ideal for the plastics processing industry. These probes offer measuring ranges from -58 to 900 °F.
Starting at
$27.00
(THMJ-D08L04-01)
Bolt-on ring sensors feature a ring terminal or washer and are bolt or screw mounted for surface temperature measurements. These probes offer measuring ranges from -58 to 900 °F.
Starting at
$22.00
(THMJ-B01L06-01)
Threaded bolt sensors are thread-mounted and feature a 1/4-28 UNF threaded stainless steel rotating bolt for easy installation. These probes offer measuring ranges from -40 to 900 °F.
Starting at
$30.00
(THMJ-N38P14-01)
Wall-mount room temperature sensors (indoor ambient air temperature sensor) are appropriate for indoor use in offices, warehouses, manufacturing plant floor space, and walk-in freezers. These sensors offer measuring ranges from -40 to 185 °F.
Starting at
$43.50
(THMJ-R01-01)
Sensors with a spade tip have a thermocouple or RTD sandwiched between two thin shims of stainless steel or sealed in epoxy between two layers of polyimide tape. The tip can be formed and secured to the outside of various sized tubes, pipes, or nozzles. These sensors offer measuring ranges from -40 to 900 °F.
Starting at
$27.50
(THMJ-S01L06-01)
Magnetic-mount thermocouple sensors measure the surface temperature of ferrous materials and are affixed with a convenient and non-destructive magnetic attachment. These sensors offer measuring ranges from of 0 to 600 °F.
Starting at
$112.00
(THMJ-M01L06-01)
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