Temperature Sensors for HVAC & Refrigeration

HVAC and refrigeration work can involve measuring air, a pipe surface, or a circulating fluid. Those measurement points have different mounting and controller requirements, so define the intended point and operating conditions before choosing a sensor.

The linked catalogue includes humidity, humidity/temperature, thermistor and RTD products. Their published product data does not establish general duct, hydronic, refrigerant-line or cold-room suitability, and no HVAC or refrigeration certification is claimed here. Confirm the specific application with engineering.

For HVAC selection, distinguish an air measurement from a fluid or pipe-surface measurement; the sensing method and mounting must suit the point being monitored. A temperature sensor reading alone does not determine refrigerant superheat or subcooling, which also depends on system measurements and controls.

For refrigeration locations, specify the expected conditions, including temperature, condensation exposure, installation method and controller input. Do not assume moisture sealing, cold-room performance or an enclosure rating unless the selected product specification documents it.

Start by matching the sensor element and signal to the connected controller. The linked temperature-humidity indicator lists a Pt100 input for temperature and a 4–20 mA humidity input; the linked thermistor product specification identifies NTC and PTC types but does not state a temperature range.

Then verify the actual mounting, required operating range, output, environmental protection and installation conditions in the chosen product's specification. The current linked product data does not document a dedicated HVAC duct probe, immersion-well assembly or refrigerant-line strap-on sensor.

For any pipe-surface installation, use the mounting method specified for the selected sensor and account for pipe insulation and ambient conditions. The product links on this page do not identify a strap-on pipe sensor, so do not treat a general RTD or thermistor listing as confirmation of that construction.

For a refrigeration or cold-room installation, confirm the minimum operating temperature, condensation exposure and enclosure protection from the exact product specification. No linked product page here states an HVAC/refrigeration certification or a general IP rating.

• Makes the measurement point and controller input explicit during HVAC sensor selection.
• Separates documented product features from unverified duct, hydronic and refrigeration requirements.
• Prompts verification of range, mounting, environmental protection and controller compatibility.

The linked temperature-humidity indicator specifies a Pt100 temperature input and a humidity input; the thermistor page identifies NTC and PTC types without stating a range. The humidity sensor specification lists capacitive relative-humidity measurement and optional Pt100/Pt1000 temperature sensing. These catalog facts do not establish a particular HVAC or refrigeration installation. Check the full product data for the required operating range, mounting, output and environmental protection. No product certification or general enclosure rating is stated here.