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Everything You Need To Know About Sensors In HVAC Control Systems

HVAC Control Systems

A sensor is an electronic device that senses and responds to environmental changes by converting them into an electrical signal that the controlling system may interpret. The type of sensor required will depend on the specific application, but the most common are temperature, pressure, flow rate, speed, and flow control. This article provides an overview of each sensor type and examples of their use in HVAC control systems.

An HVAC control system may seem like an intimidating concept at first, but knowing the basics can make it much easier to understand and use them in practice. A control system combines sensors with actuators to regulate temperatures and other variables within an environment. The sensors measure environmental variables such as temperature, pressure, and humidity, while the actuators make changes to respond to these variables. Many different types of sensors can be incorporated into an HVAC control system, and this article will go over each of them in detail.

The Different Types of Sensors Used in HVAC Control Systems

Sensors are devices that detect changes in the environment and convert them into signals that other systems can interpret. In HVAC control systems, sensors do things like measure temperature, pressure, airflow, and more. The type of sensor used depends on the application and desired results. This article takes a look at some of the most common types of sensors used in HVAC control systems.

Temperature Sensors

A temperature sensor is often used in cooling and heating systems to sense the current room temperature and determine when an adjustment should be made. The most common form of this device is a thermistor, which changes its resistance based on its surrounding temperature. If you want your system to control the climate optimally, it’s important to place the sensor at a location with a good representation of the entire space. There are many different types of sensors for use in HVAC systems. Other types include humidity sensors and smoke detectors.

Siemens Sensors

Siemens Sensors offers a variety of sensors that can be used to help determine the health and effectiveness of your air conditioning system.  The company’s digital pressure sensors are great for measuring how much work is being done by the compressor, allowing you to better plan for future maintenance and upgrades. The wide range of optical infrared measurements enables you to take advantage of features like night vision or fog detection, while vibration and displacement measurement helps you monitor conditions like bearing wear or blade contact. In this way, Siemens sensors are designed with energy efficiency in mind.

Mamac Sensors

Mamac sensors are just one type of sensor found in HVAC control systems. They are used to measure the temperature and humidity inside the home. When a sensor detects that it is too cold or too humid, it will adjust the thermostat to make sure that your home is at an optimal temperature. 

Humidity Sensor

When humidity is at the desired level, the humidistat turns off the air conditioning. If humidity levels rise, as detected by a humidistat that’s been triggered and started an alarm, it will activate the AC. A carbon monoxide sensor warns when CO concentrations are high enough to be dangerous. Occupancy sensors can adjust airflow rates based on how many people are in the room. Motion sensors turn lights on and off when they detect movement. Heat sensors can detect if a person’s still inside or has left so that the heating system can be turned off accordingly.

Square D Sensors

Square D by Schneider Electric offers six different sensors to help detect and diagnose issues. You can choose from pressure, volume, humidity, temperature, voltage, or alarm. Square D by Schneider Electric strives to provide the highest quality sensors at the most competitive price. 

Square D Sensors allow you to protect your equipment with high-quality sensor equipment while saving money on installation costs with a pre-wired thermo with built-in sensor silt-in.

Also, Check – Reasons Why You Should Frequently Repair Your Home HVAC System

Flow Sensor

A flow sensor is one type of sensor that is commonly used in HVAC control systems. This device is fitted into the ductwork and detects airflow through a pipe or tube by measuring the time it takes for gas to travel a certain distance. The frequency with which flow sensors detect change tells you how much gas passes through, as this flow will also trigger other sensors located further down the line. For example, when a blower fails to come on because of too low an airflow from the compressor, the upstream damper automatically closes to prevent leakage.

Veris Sensors

Veris sensors measure temperature, humidity, pressure, and many other parameters. These measurements are very important for monitoring the effectiveness of an HVAC system. Temperature is used to gauge how much energy is required to maintain a comfortable environment for building occupants. Humidity measurements help determine when to change the water filter in the system. Pressure measurements provide valuable information about whether or not enough fresh air is being introduced into the space. The more accurate these readings are, the better equipped you will be to detect potential problems before they happen.

Solar Radiation Sensor

A solar radiation sensor is one of the most common types of sensors in an HVAC control system. The amount and type of solar radiation that a building is exposed to, such as sun or shade, can affect its heating and cooling requirements. In this way, solar radiation can help predict your building’s thermal demand for heating and cooling. These sensors are often used with other HVAC control systems, such as daylighting or radiant cooling and heating systems. 

These are passive controls because they only respond to outside factors like sunlight. There are two main types of solar radiation sensors that you can see in HVAC & Electrical Parts Supply Stores: non-reflective infrared and reflective infrared.


You now know the basics of how sensors work and the types of sensors typically used in an HVAC control system. Talk to an HVAC professional today if you’re looking for ways to increase your comfort, reduce energy usage, or improve indoor air quality. They’ll be able to design a system that will meet your needs while minimizing any challenges you might have with getting comfortable with new technology. Many people are unaware that HVAC sensors can measure a space’s temperature, humidity, and carbon dioxide levels. These sensors can be digital or analog and include thermostats and probes. It is important for anyone working on an HVAC system to understand how each sensor works because this will determine how it is mounted on the equipment being serviced or installed.

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