1,900+ duct temperature sensors in our stock, all from renowned manufacturers like ACI, Dyer, Mamac, and others. Browse the Blackhawk Supply store today!
View Details Siemens QVM62.1 Air Velocity Sensor, 0 to 10 Vdc  | Blackhawk Supply
View Details Veris CDE CO2 | Duct | Economy | No LCD  | Blackhawk Supply
$13.75 each
View Details Siemens QPM2100 Duct Sensor CO2, 0 to 10V  | Blackhawk Supply
$216.63 each
View Details Belimo 01DT-5LL Duct Temp Sensor NTC10k 100x6  | Blackhawk Supply
$405.53 each
View Details Belimo 22DC-51 Duct CO2 Sensor V  | Blackhawk Supply
22DC-51 | Duct CO2 Sensor V | Belimo
Brand: Belimo
SKU: 22DC-51
$597.53 each


What Are Duct Temperature Sensors and Why Are They Important for Building Automation Systems?

Duct temperature sensors are electronic devices that measure the air or water temperature as it flows through a duct system. They play a critical role in building automation systems by providing accurate temperature readings that can be used to control HVAC equipment and maintain a comfortable indoor environment. Duct temperature sensors are particularly important in commercial and industrial settings where large HVAC systems are used to maintain comfortable temperatures in large spaces.

What Are the Parts of Duct Temperature Sensors?

Duct temperature sensors typically consist of the following parts:

  • Probe: The probe is part of the sensor that comes into direct contact with the air in the duct units. It contains a temperature sensor that measures the temperature of the air as it flows over the probe.
  • Cable: The cable connects the probe to the control system and transmits the temperature readings.
  • Enclosure: The enclosure protects the sensor from damage and environmental factors, such as moisture or dust.

Different Types of Duct Temperature Sensors

There are several different types of duct temperature sensors available, including:


  • Thermistor Sensors: These sensors use a thermistor, which is a type of resistor that changes resistance based on temperature, to measure air temperature.
  • RTD Sensors: RTD sensors use a wire made of a material that changes resistance based on temperatures, such as platinum or copper, to measure air temperature.
  • Thermocouple Sensors: Thermocouple sensors use two different metals that produce a voltage based on the difference in temperature between the two metals to measure air temperature.
  • Infrared Sensors: Infrared sensors measure the temperature of the air by detecting the amount of infrared radiation emitted by the air.


Duct Temperature Sensors

Choose from 2,372 different duct temperature control sensors at Blackhawk Supply!

The ducts in your building often contain particles and dirt that accumulate over the years. That's why you need controls sensitive enough to detect temperature changes and sturdy enough to withstand demanding environmental conditions.

To help you, we offer 2,372 duct temperature control sensors from quality manufacturers such as ACI, Belimo, Mamac, and Veris. These sensors vary in length from 2 to 36 inches with sensor wire lengths stretching from 6 to 20 feet.

We also carry over 28 different element types. These elements are the materials that carry currents to the HVAC system. You can measure them through a variety of different electrical units of measurement like VDC, mA, mV, and Ohms.

You can even find specialty sensors for your specific needs. For example, Belimo carries two models that run on the BACnet and Modbus communication protocols. Veris carries 36 specialty sensors with various probe lengths that come with an LCD monitor.

Other sensor characteristics include sensor type, temp & humidity signals, probe length, probe diameter, element type, and sensing element. Learn more about the characteristics of each feature below.


  • CO Carbon Monoxide
  • CO and NO2
  • CO2 Carbon Dioxide
  • Humidity 1%
  • Humidity 2%
  • Humidity 3%
  • Humidity 5%
  • Temp and Humidity 1%
  • Temp and Humidity 2%
  • Temp and Humidity 3%
  • Temp and Humidity 5%
  • Temperature


  • RTD & 0-10 VDC
  • RTD & 4-20 mA
  • Thermistor & 0-10 VDC
  • Thermistor & 4-20 mA


  • RTD
  • RTD (High Temp)
  • RTD (Low Temp)
  • Semiconductor
  • Thermistor
  • Transmitter
  • Transmitter (High Temp)
  • Transmitter (Low Temp)


Duct temperature sensors are critical components of building automation systems. They provide accurate temperature readings that can be used to control HVAC equipment and maintain a comfortable indoor environment. At Blackhawk Supply, we offer a wide range of high-quality duct temperature sensors to meet your needs; even custom probe lengths and diameters. Contact us today to learn more about our selection and find the perfect sensor for your application.

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as experts in Duct Temperature Sensors