HVAC Damper Position Sensing Using Magnet Sensors

In traditional high voltage air conditioning systems (HVAC), manual control of fresh air intake and room ventilation is common practice. Typically, operators adjust the damper levels on the blower manually to regulate the amount of fresh air mixing with circulated air. This method, while functional, can be inconsistent and labor-intensive, potentially affecting indoor air quality and system efficiency. Moreover, in environments requiring occasional venting for safety reasons, such as during processes that generate fumes or hazardous materials, manual adjustments may not suffice in ensuring optimal conditions for personnel.

The integration of a reed sensor in motorized dampers revolutionizes HVAC control by automating the adjustment of fresh air intake and ventilation. Mounted on the motor of the damper, the reed sensor accurately counts the revolutions of the motor. This rotational data is then translated into precise percentages of fresh air entering the room, facilitating a controlled environment that meets regulatory standards and enhances indoor air quality. By automating these processes, the reed sensor eliminates the need for constant manual monitoring and adjustment, improving operational efficiency and consistency in air management.

The reed sensor’s role in HVAC systems helps in real-time monitoring capabilities. It enables HVAC engineers to remotely monitor and adjust fresh air levels based on predefined parameters and environmental conditions. This ensures optimal air quality and also contributes to energy savings by optimising the system’s performance. Additionally, the integration of reed sensors enhances system reliability, reducing the potential for human error and ensuring continuous compliance with safety and environmental regulations. Overall, the adoption of reed sensors in motorised damper systems represents a significant advancement in HVAC technology, offering enhanced control, efficiency, and safety in commercial and industrial applications.

Application Classification

Applications are classified as Position Sensing, Pulse Counting, Electromagnetic or Relay, Temperature Sensing or Magnet Biasing types. This application is classified as follows and the link gives more information on best practices to help select the most suitable AT band and matching magnet.

Position sensing Type

When an application requires the end position of a movement sensed, or the sensing of a part when it comes into a zone, or when the Continue reading -> Sep 29, 2024

Recommended Products

The Reed Switches and Sensors used in such HVAC applications need to be robust, durable and efficient in meeting a high life expectancy. Our engineers work hard in life testing our products under various conditions, and our intention is to ensure end product durability and life. Although we wouldn’t want to restrict any of our products for use in only certain applications, the recommended products for use in this application are listed below.

Standard PCB Mountable Reed Sensor, MS-108

Drawing of MS-108 Reed SensorDrawing of MS-108 Reed Sensor Pad Layout starFeatures10W Contact Rating. 20.3 mm PCB Pitch. Normally Continue reading -> Sep 3, 2024

M8 Threaded Sensor Cylindrical Sensor, MS-228

MS-228 M8 Threaded Sensor Drawing starFeatures30W Contact Rating. Normally Open contact. Three sensitivity bands. Sputtered Ruthenium Continue reading -> Sep 28, 2024

Standard Flat Pack Magnet Sensor, MS-328

starFeatures10W Contact Rating. Normally 30W Contact Rating. Normally Open contact. Three sensitivity bands. Sputtered Ruthenium Continue reading -> Sep 28, 2024