A HVAC temperature meter is a device used to measure the temperature of air, water, or other liquids. It is commonly used in heating, ventilation, and air conditioning (HVAC) systems to ensure that the air temperature is maintained at a comfortable level. The temperature meter measures the temperature of the air or liquid by sensing the heat energy that is emitted from the air or liquid. The temperature is then displayed on the meter in either Celsius or Fahrenheit. Temperature meters are also used to monitor the temperature of refrigeration systems, boilers, and other mechanical systems. They are an important tool for HVAC technicians to ensure that the system is operating at the correct temperature. Additionally, they can be used to detect any problems with the system, such as a malfunctioning thermostat or an over-heated motor.