To well understand the pressure sensor for AC and HVAC applications, you should know the difference between this two system, people may use the two terms interchangeably. However, there is a definitive difference between the two types of units, and while the acronyms may be used interchangeably, they do in fact refer to two different things. here is some little help to understand them.

1. WHAT IS AN HVAC UNIT?

HVAC stands for Heating, Ventilation, and Air Conditioning. An HVAC unit is responsible for heating and cooling the air in your building, and provide ventilation to allow moisture to escape. Your HVAC unit includes the furnace, the air conditioning unit (if you have one), and any ducts or vent-work designed to release moisture. While all HVAC units do reference air conditioning units, not all air conditioning units are HVAC units.

2. WHAT IS AN AC UNIT?

AC or air conditioning, is the system designed to cool the air in your home. Someone call an AC unit anything that conditions the air, hot or cold.

3. KNOW THE DIFFERENCE

To keep things simple: the system designed to cool the air is the AC unit(AC unit only cools your home), and the system designed to heat the air and push moisture out through the vents, is the HVAC unit(HVAC unit heats, cools, and ventilates your home). The below sensors are widely used in the A/C and HVAC system, they are quality made with a smart size, light weight and competive price cost.

pressure sensor for A/C Model SS204 (brass version)	pressure sensor for A/C Model SS207 (stainless steel version)	pressure sensor for A/C Model SS205 (1/4 SAE version)	pressure sensor for A/C Model SS201 (standard version)

The AC pressure sensor is a safety device that is mounted on both the high and low sides of the air conditioning system. It monitors the pressure of the refrigerant on its respective side of the system. There is a high side pressure sensor, and low side pressure sensor, and they both serve to monitor the system for pressure faults that can damage the compressor.

When the pressure is too low, the compressor risks damage due to running with low oil. When it is too high, the compressor is at risk of overheating and becoming damaged. Depending on which side of the system the sensor is mounted in, when the pressure rises too high or drops too low, the sensor will turn off the compressor to prevent damage from occurring.When the pressure is too low, the compressor risks damage due to running with low oil. When it is too high, the compressor is at risk of overheating and becoming damaged. Depending on which side of the system the sensor is mounted in, when the pressure rises too high or drops too low, the sensor will turn off the compressor to prevent damage from occurring.

As the pressure sensor control the on/off function of the AC compressor, a sensor failure can prevent the AC compressor from functioning at all. The compressor is what pumps refrigerant through the entire system. If it is not functioning, then the system can not operate, and will be unable to produce cold air.