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BMS Controls Articles

What is a Supply Air Sensor?

What is a Supply Air Sensor?

Air conditioning systems are complex, and managing them requires a lot of knowledge. One important component of an air conditioning system is the supply air sensor, or SAS. This device can be used to monitor the temperature and humidity of the airstream coming from your HVAC system. It’s important to understand how this device works in order to keep your home comfortable during hot summers and cold winters. In this article, we’ll discuss what a supply air sensor is and how it works in detail. We’ll also explore some common uses for a SAS as well as some potential applications.

What is a supply air sensor?

A supply air sensor is a device that measures the temperature of the air flowing into a space. The sensor is typically located at the point where the air enters the space, such as an air handler or ductwork. The sensor reads the temperature of the air and sends a signal to the control system, which then adjusts the amount of heating or cooling being provided to the space.

What are the benefits of using a supply air sensor?

A supply air sensor is a device that measures the temperature of the air coming out of a furnace or other heating system. By knowing the temperature of the supply air, the heating system can be controlled to maintain a comfortable indoor temperature.

A supply air sensor can save energy by preventing the furnace from running when it is not needed. For example, if the outdoor temperature is warm and the indoor temperature is already comfortable, the furnace does not need to run. By monitoring the supply air temperature, the furnace will only run when it is needed, saving energy.

In addition to saving energy, a supply air sensor can also improve comfort by preventing indoor temperatures from fluctuating too much. If the outdoor temperature changes suddenly, a furnace that is not controlled by a sensor can cause indoor temperatures to swing widely in response. This can be uncomfortable for occupants and may cause drafts or hot spots. A supply air sensor can help prevent these swings by keeping the furnace at a consistent output.

How does a supply air sensor work?

A supply air sensor is a device that measures the temperature of the air being supplied to a space by an HVAC system. The sensor is typically located in the supply ductwork or near the air handler unit. The sensor signal is used by the controller to regulate the operation of the HVAC system to maintain the desired space temperature.

Where can I get a supply air sensor?

If your air conditioner or heat pump is not working, one of the first things you should check is the supply air sensor. The supply air sensor is a small device that measures the temperature of the air coming out of the evaporator coil. If the sensor is defective, it can cause the unit to cycle on and off too frequently or to run for too long.

To replace the supply air sensor, you will need to purchase a new one from a local HVAC contractor or online retailer. Be sure to get the correct model for your unit. Once you have the new sensor, follow these instructions:

1. Turn off power to your air conditioner or heat pump at the breaker box.

2. Remove the old sensor from its mounting bracket.

3. Install the new sensor in the same location as the old one.

4. Reconnect any wiring that was disconnected when you removed the old sensor.

5. Restore power to your unit and test it to be sure it is working properly

Conclusion

A supply air sensor, or SAS, is a device used to measure and control the temperature of the air in an HVAC system. Used together with a return air sensor and an ambient temperature sensor, it provides feedback on the heating and cooling systems so that they can be adjusted as needed. By accurately monitoring airflow temperatures, these sensors help keep your home comfortable while also reducing energy costs by preventing overcooling or overheating. With all its benefits, investing in one of these systems is definitely worth it!