Electrical installation equipment

Motion and light sensors

Motion sensors are electronic devices designed to detect physical movement within a specific area. They are widely used in various locations, especially in conjunction with lighting fixtures, both in homes and commercial spaces.

Motion sensors can operate based on different principles, depending on the type of technology used. The most popular include:

– PIR (Passive Infrared): Detect changes in the level of infrared radiation. When a person or animal enters the sensor’s range, the heat emitted by the body causes a change in the level of radiation detected by the sensor.
– Microwave: Use radio waves to detect movement. They emit a wave that bounces off objects and returns to the sensor. Movement within the sensor’s range changes the frequency of the reflected wave.

Light sensors monitor the ambient lighting and activate the device if the light falls below a set threshold.

1. Energy saving

Motion sensors in lighting fixtures automatically turn on the light when they detect presence and turn it off when there is no movement. This significantly reduces the consumption of electrical energy because the light only shines when it is needed.

Since the lights are only turned on when needed, the lifespan of the bulbs is extended, which lowers the costs of replacement and maintenance.

Energy savings also lead to a reduction in the carbon footprint, which is beneficial for the environment.

2. Sensitivity and range

Sensors can have varying range and sensitivity, which can be adjusted to meet specific needs. The most common parameters that sensors can regulate or check are:

– exposure time – determines how long the light will stay on after detecting motion,
– range sensitivity – determines the distance at which motion is detected,
– ambient light sensitivity – checks the level of lighting and activates the sensor only after a defined threshold, so the lamp will turn on only after dark.

3. Safety

Automatic activation of lights upon motion detection increases safety because areas such as hallways, staircases, garages, or garden paths are illuminated when needed, reducing the risk of tripping or falling in the dark.

The activation of lights upon motion detection can also deter potential intruders, making it an effective tool in security systems.

4. Convenience

Users don’t have to remember to turn the lights on and off, which is especially useful in rooms that are rarely visited or where lights are often forgotten to be turned off (e.g., basements or warehouses).

Infrared detection

PIR sensors

PIR sensors work by detecting the level of infrared (heat) radiation emitted by objects within their range. They are sensitive to changes in temperature, allowing them to detect the presence of humans or animals.

PIR sensors operate passively, meaning they do not emit any type of radiation or waves; instead, they passively “listen” for changes in infrared radiation in their surroundings.

They have a specified detection range, which can vary depending on the model. They also have a specified field of view, determining how wide an area their detection can cover. Sensitivity adjustment is possible, allowing for the minimization of false alarms. Additionally, it’s possible to set the duration for which the device will be active after motion detection.

Because they detect changes in heat, they are less prone to false alarms caused by external factors such as the movement of tree branches or small animals, compared to some other types of motion sensors. Due to their heat detection, PIR sensors do not work through walls or obstacles.

PIR sensors may not function properly in extreme temperature conditions, and they may be less effective when an object moves directly toward or away from the sensor instead of within its field of view.

PIR sensors are typically inexpensive and offer an effective, cost-efficient method of motion detection.


Index: ORO12002


Index: ORO12005


Index: ORO12003

Microwave sensors

MIC sensors

Microwave sensors, also known as radar sensors, operate on the principle of Doppler radar. They emit microwave waves that bounce off objects within their range. Movement of an object causes a change in the frequency of the reflected waves, which is detected by the sensor as motion.

Obstacle penetration: One of the main advantages of microwave sensors is their ability to penetrate through certain materials such as walls, doors, or glass surfaces. This means they can detect motion even when the object is not directly in their line of sight.

They typically have a longer detection range compared to PIR sensors, allowing for monitoring of larger areas.

These sensors are highly sensitive, enabling them to detect even slight movements. However, this characteristic can lead to a higher rate of false alarms, especially in outdoor environments where the movement of trees or other objects may be incorrectly interpreted as human motion.

Environmental resistance: Microwave sensors are less sensitive to changes in environmental conditions such as temperature or lighting compared to PIR sensors.

Similar to PIR sensors, microwave sensors have a specified detection range and angle that can be adjusted to the specific needs of the application. Parameters such as sensitivity or alarm duration can be customized, providing better control over their operation.

MIC microwave sensors are highly effective in detecting motion, offering a wider detection range and the ability to penetrate through some obstacles. Their high sensitivity and resistance to environmental changes make them an excellent choice in applications where reliability and accuracy in motion detection are paramount. However, these features must be weighed against potentially higher costs and increased energy consumption. Microwave sensors are therefore ideal in situations where these aspects are acceptable in the context of the overall system requirements.


Index: ORO12006


Index: ORO12007

Twilight sensor


The SENSO DAYLIGHT light sensor monitors the brightness of the environment and activates the selected device below the set threshold. This ensures that the selected lamps will only illuminate after dusk. The SENSO DAYLIGHT sensor can also be connected to PIR or MIC motion sensors, expanding their operational capabilities.


Index: ORO12008