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There are two main types of motion detection sensors available, microwave and PIR (Passive Infrared) and we’re here to take a quick look at the pros and cons of each.
Microwave sensors can be more efficient for indoor lighting, this is because Microwave sensors are incredibly sensitive to movement, even being able to sense motion through thin walls, glass and plastic. If you’re using a microwave sensor as a security light, there’s a higher chance of false alarms. Don’t use them facing conservatories ...
Microwave detection is a newer and more advanced occupancy sensor than the PIR– it works by emitting high-frequency electromagnetic waves and then receiving.
Aug 31, 2021 · Microwave motion sensors do have a consistent capability of detecting movements in all temperatures. They provide the perfect lighting conditions in any extreme environment and help occupants with the perfect moment along with improved safety.
- Introduction
- How Does A Passive Infrared Sensor (PIR) Work?
- How Does A Micro-Wave Sensor (MW) Work?
- What Is The Doppler Effect?
- Passive Infrared (PIR) V Microwave (MW) For Occupancy Sensing. Which Is Best?
Passive infrared (PIR) and microwave (MW) sensors are both widely used in lighting control. They both have the ability to detect moving objects, such as human bodies, but they work in quite different ways to each other. As a result, they have different advantages and drawbacks depending on their application. Please note that neither a PIR nor a MW ...
A PIR is a passive device. It detects the movement of an infrared radiation source within its range and field of view. Infrared (IR) radiation is emitted by all warm or hot bodies, including birds, mammals and any heat source such as an engine or motor that has been running recently. The warmer they are the more IR they emit. Provided that there is...
A micro-wave sensor is an active device. It emits very low-level pulses of electro-magnetic radiation which hit, and bounce back from objects within its range. The sensor receives and, using the Doppler effect, analyses the incoming radiation to determine if there are any moving objects in the field of view.
Most of us experience the Doppler effect every day with respect to sounds we hear. The Doppler principle is that the apparent frequency of a wave (such as sound) depends on the speed of the source (which is making the sound) relative to the speed of the receiver (which is hearing the sound). The Doppler principle can be applied to any wave, not jus...
Both technologies have their strengths and weaknesses and are therefore better suited to different applications in lighting control. 1. High and low ambient temperatures. To function, a PIR requires a temperature differential between the moving object and the background. Therefore, bearing in mind that the human body temperature is 37ºC, the abilit...
Aug 19, 2020 · What Are Microwave Sensors? Unlike PIR sensors, microwave sensors work similarly to sonar. These sensors send out constant microwave signals into their environment. They then measure how long it takes for the signal to bounce back to the sensor.
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V-TAC Microwave motion sensors offer a fine-tuned experience of the traditional PIR motion sensor, picking up much smaller movements and triggering your lighting in more difficult spaces.
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