HVAC and Refrigeration Applications

HVAC/R Temperature SensorsNTC Thermistors are the most commonly used temperature sensors for the HVAC and Refrigeration industry. Air temperature measurement is commonly monitored, in addition, airflow also can be determined by using NTC thermistors in a self-heating mode. QTI has a great deal of experience manufacturing standard thermistors as well as for harsh environments. Check out our IP68 waterproof temperature sensor that can clip directly to a coil. If you need a custom part to meet your Title 24 HVAC requirements, QTI can help. We stock a variety of housings, wire and plenum rated cables. Click here to view our HVAC thermistor catalog.

  • Heating systems
  • Central air systems
  • Thermostats
  • Control / automation systems
  • Remote temperature sensing indoors / outdoors
  • Heat pumps
  • Radiant floor heating
  • Snow and ice melt
  • Dehumidifier and humidifiers
  • Thermistor for HVAC controllers
  • Condenser coils
  • Duct temperature sensors
Recommended Temperature Sensors

IP68 waterproof probe

QTIP68 overmolded probes are a great solution where moisture resistance is critical to corrosion prevention.

QTSSP waterproof swage probe

The sturdy waterproof Swage probe excels in severe environments where response time is critical.

QT06024A waterproof ring lug

The QT06024A molded ring lug is ideal for surface temperature measurement in damp or high-humidity environments.

QT06024B waterproof pipe mount

The QT06024B moisture resistant sensor is ideal for mounting to pipes or other rounded surfaces.

QT06024C waterproof molded probe

QTI's QT06024C molded general purpose temperature sensor is ideal for high-humidity environments.

QT06004 flanged

Stainless steel flange probes are available in a wide variety of sizes and flange shapes.

QT06001 threaded fitting with tube

QT06001 hex nut probes are ideal for many different types of liquid temperature measurement.

QT06007 hex nut

Hex nut temperature sensors are ideal for heat-sink or power transistor over-temperature protection.

QT06035 air sensor

The “birdcage” sensor's unique shape is ideal for air temperature sensing.