Motion and Twilight Sensors for Lighting

Q: What is the fundamental difference between infrared (PIR) and microwave (HF) motion sensors in lighting automation?

PIR sensors detect changes in heat radiation (photons) within the optical line of sight. Microwave (HF) sensors actively emit 5.8 GHz radio waves and detect the Doppler shift of the reflected wave, allowing them to register motion even through thin drywall or glass.

Q: Why does the maximum relay switching power differ for LED luminaires and resistive incandescent bulbs?

At the moment of switching on, LED power supplies generate a sharp and powerful current pulse (Inrush Current) that can melt standard relay contacts. Therefore, a sensor with a 1200W nominal rating for incandescent bulbs can technically only handle up to a 300W total LED load.

Q: How do VIDEX motion sensors help improve spatial energy efficiency according to modern standards?

By automating the lighting to turn on only in the presence of a person, the human factor and the illumination of empty rooms are eliminated. Using sensors in offices, stairwells, and warehouses physically reduces electrical energy consumption by 60% to 80%.

Q: How to properly set the sensor's sensitivity (SENS) and ambient light (LUX) threshold parameters?

The LUX dial calibrates the photoresistor, blocking the lighting from turning on during the day when natural light exceeds the set threshold (e.g., 30 lx). The SENS dial allows mechanical reduction of the detection radius so the sensor does not react to people in adjacent rooms.

Q: Is it possible to connect multiple motion sensors in a single common lighting circuit?

Yes, by using parallel wiring, a single lighting line can be controlled simultaneously by two or more sensors. This is critically necessary in long corridors—as soon as any of the sensors detect motion, it closes the mains phase (L) and activates the lighting.

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Motion and Twilight Sensors optimize energy consumption and automate lighting networks in industrial and residential facilities.

Modern energy efficiency is unimaginable without smart power grid management. The infrared (PIR) motion and twilight sensors (220-240V) offered by VIDEX are high-precision commutation nodes that physically interrupt the current flow when illumination is not needed in the room or perimeter. The infrared receiver reacts to the dynamics of thermal radiation (the human body) in the detection field, instantly closing the contact. All models integrate high-quality relay mechanics that support wide time delay adjustments ranging from 10 seconds up to 30 minutes, preventing rapid and unwanted light flickering due to brief stays. The devices also integrate a sensitive LUX photocell, allowing the user to set the light activation threshold (from <3 to 2000 Lx), ensuring that the luminaires turn on only when a specific level of dusk is reached. These engineering solutions are capable of controlling both small-scale indoor networks (IP20) and expansive outdoor facade and garden perimeters, thanks to hermetic (IP44 / IP65) housings.

Engineering specification of infrared (PIR) sensors:

Thermal detection: PIR technology guarantees an immediate response to movement within a wide radius (from 8m to 20m), eliminating false alarms from wind or precipitation.
Combined LUX relay: The integration of a photocell ensures autonomous Day/Night operation, activating the voltage only when the actual lighting drops below the set lux level.
Power and time control: The integrated timer mechanics (up to 30 min) keep the line active for exactly as long as necessary for safe navigation or carrying out work.

By installing detectors of appropriate capacity, an autonomous power grid independent of human factors is created, significantly reducing electricity bills and extending the lifespan of luminaires. In order to fully utilize this system in long industrial premises and corridors, an ideal addition to connect to the system will be the powerful Waterproof Linear LED Lights.

Q: What is the fundamental difference between infrared (PIR) and microwave (HF) motion sensors in lighting automation?

A: PIR sensors detect changes in heat radiation (photons) within the optical line of sight. Microwave (HF) sensors actively emit 5.8 GHz radio waves and detect the Doppler shift of the reflected wave, allowing them to register motion even through thin drywall or glass.

Q: Why does the maximum relay switching power differ for LED luminaires and resistive incandescent bulbs?

A: At the moment of switching on, LED power supplies generate a sharp and powerful current pulse (Inrush Current) that can melt standard relay contacts. Therefore, a sensor with a 1200W nominal rating for incandescent bulbs can technically only handle up to a 300W total LED load.

Q: How do VIDEX motion sensors help improve spatial energy efficiency according to modern standards?

A: By automating the lighting to turn on only in the presence of a person, the human factor and the illumination of empty rooms are eliminated. Using sensors in offices, stairwells, and warehouses physically reduces electrical energy consumption by 60% to 80%.

Q: How to properly set the sensor's sensitivity (SENS) and ambient light (LUX) threshold parameters?

A: The LUX dial calibrates the photoresistor, blocking the lighting from turning on during the day when natural light exceeds the set threshold (e.g., 30 lx). The SENS dial allows mechanical reduction of the detection radius so the sensor does not react to people in adjacent rooms.

Q: Is it possible to connect multiple motion sensors in a single common lighting circuit?

A: Yes, by using parallel wiring, a single lighting line can be controlled simultaneously by two or more sensors. This is critically necessary in long corridors—as soon as any of the sensors detect motion, it closes the mains phase (L) and activates the lighting.