Showing all 11 results
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DT235: RTD / Resistance Input Two-Wire Dual Transmitter
- Dual channels
- RTD (Pt, Ni, Cu), 0-4500 ohm inputs
- 4-20mA output (sink/source)
- 7-32V DC loop power
Click here to watch a short video highlighting the features of the DT235.
$290Select options -
DT335: RTD/Resistance Input Four-wire Dual Transmitter
- Dual channels
- RTD (Pt, Ni, Cu) or 0-4500 ohm input
- 0-20mA, ±10V outputs
- 6-32V DC local/bus power
$340Select options -
TT231: RTD / Resistance Input Two-Wire Transmitter
- 100 ohm Pt RTD or 0-900 ohm input
- 4-20mA output (sink/source)
- 12-32V DC loop/local power
- USB configuration
$195Select options -
VPM3000 Series: Universal Transmitter / Alarm with Display
- Big, bright display
- 4-20mA, ±10V, thermocouple, or RTD input
- 4-20mA, Modbus serial, or alarm relay output options
$345 – $545Select options -
657T, 658T: Single or Dual Channel, RTD Input, Loop-powered Transmitter
- 100 ohm Pt, 120 ohm Ni, 10 ohm Cu (selectable type) input
- 4 to 20mA DC output
- 12-50V DC from output loop power
- DIP-switch configuration, push-button calibration
$260 – $430Read more -
801T: Universal Input Intelligent Temperature Transmitter
- 0 to 20mA DC, 0 to 10V DC output
- Mechanical relay (25V @ 5A) alarm
- 10-36V DC power
- Software configured
- Performs linearization, square root extraction, and optional limit alarm functions
$375 – $520Read more -
ST131: Transmitter, RTD Input, Loop-Powered
- 100 ohm Pt RTD or 0-900 ohm input
- 4 to 20mA DC output
- 9-32V DC from output loop power
- USB-configured
$120 – $140Select options -
TT235: Isolated RTD Input, Loop Power, 2-Wire Transmitter
- Selectable RTD or linear resistance input type or 0-500 ohm input
- 4-20mA output (sink/source)
- 12-32V DC loop/local power
- USB configuration
$195Select options -
TT335: Isolated RTD Input, DC Local/Bus Power Transmitter
- Selectable RTD or linear resistance input type or 0-500 ohm input
- Universal output (source)
- 12-32V DC local/bus power
- USB configuration
$265Select options -
uB34, uB35: Platinum RTD Field Input Module
- Bluetooth® wireless configuration option
- Platinum RTD (2,3, or 4-wire) field input
- Voltage host output
$135 – $240Select options
RTD Input Temperature Transmitters - Continued

RTD technology provides an excellent means of measuring the average temperature over a surface by spreading the resistance wire over that surface, and this ability to average temperature over a surface area (or an immersion depth) will be more desirable for some applications. The use of a platinum RTD sensor may be preferred when a temperature measurement accuracy of better than 1°F or 1°C is required. By comparison, thermocouple accuracy will be on the order of 2°C to 4°C, typical. However, for point-of-contact measurement at temperatures above about 800°C (the maximum temperature at which platinum RTDs can be used), a thermocouple is the better choice due to its higher rated operating temperature.
Top Considerations When Selecting RTD Types
- The RTDs Temperature Coefficient of Resistance (TCR)
- Its relative sensitivity
- Its accuracy and repeatability
- Interchangeability
- Stability and drift characteristics
- Insulation resistance
- Its response time
- Its packaging and the thermal transfer mechanism between the sensed material and the sensor element.
- The negative effects of corrosion and contamination
- Shock and vibration
- Self-heating
- Meter loading
- And in some cases, even thermoelectric effects
Learn more about temperature measurement in this Technical Paper