Finder 18.91.8.230.0040 – 18 Series PIR movement and presence detectors

Why Choose the Finder 18.91.8.230.0040 PIR Movement Detector?

The Finder 18.91.8.230.0040 is a compact and reliable passive infrared (PIR) movement detector designed for automatic lighting control in residential, commercial and building automation installations. As part of the Finder 18 Series movement and presence detector range, it combines infrared movement detection, adjustable ambient light sensitivity and timed switching to provide convenient, energy-efficient lighting operation.

This detector automatically activates compatible lighting loads when movement is detected within its monitored area, subject to the selected ambient light threshold. Its integrated light-dependent sensor helps prevent unnecessary switching during daylight, while the adjustable switch-off delay allows lighting to remain active for a predetermined period. An additional external push-button input provides manual timed activation, making the detector particularly useful in corridors, stairways and other frequently accessed spaces.

With a 230 V AC supply, a 200 W maximum compatible lighting load and a 110° detection angle with a range of up to 7 m, the Finder 18.91.8.230.0040 is ideal for automatic indoor lighting control. Its ultra-compact white recessed-mounting design is compatible with popular electrical accessory frame systems through the supplied adaptors, enabling discreet installation in modern building interiors.

Key Advantages

• Compact PIR movement detector designed for automatic indoor lighting control.
• 230 V AC supply compatible with standard mains-powered electrical installations.
• 110° detection angle providing coverage of movement within the monitored area.
• Detection range up to 7 m for corridors, stairways and circulation spaces.
• 200 W maximum lighting load suitable for compatible LED and conventional lamps.
• Adjustable 10 s to 20 min switch-off delay.
• Integrated ambient light sensor with adjustable intervention threshold.
• External push-button input for manual timed lighting activation.
• Zero-crossing switching technology helps improve output performance and service life.
• Compact white design with adaptors for popular electrical accessory systems.
• Helps reduce unnecessary lighting energy consumption in intermittently occupied areas.

Key Features

• Finder 18 Series movement detector.
• 18.91.8.230.0040 white PIR movement detector.
• 230 V AC rated supply voltage.
• 50/60 Hz operating frequency.
• 200 W maximum compatible lighting load.
• 110° horizontal detection angle.
• Up to 7 m movement detection range.
• Passive infrared movement detection technology.
• Integrated light-dependent sensor for daylight-sensitive operation.
• 6–600 lx adjustable ambient light threshold.
• 10 s to 20 min adjustable switch-off delay.
• External momentary push-button input for timed manual activation.
• Zero-crossing electronic switching technology.
• Suitable for compatible LED, fluorescent, incandescent and halogen lighting.
• Ultra-compact lens and recessed installation format.
• White front finish for discreet integration into electrical accessories.
• IP20 protection rating.
• Supplied adaptors for compatible electrical accessory frame systems.

Reliable PIR Movement Detection for Automatic Lighting Control

Passive infrared movement detectors such as the Finder 18.91 monitor changes in infrared radiation within their detection area. When a person moves through the monitored zone, the detector identifies the change and activates its electronic switching output, provided the measured ambient light level satisfies the configured threshold. This allows lighting to operate automatically when required while helping reduce unnecessary energy consumption.

The Finder 18.91 Series is specifically designed for indoor movement detection in corridors, stairways, bathrooms and other circulation areas. Its specialised optical lens provides a wide detection field while maintaining an ultra-compact appearance. The detector also distinguishes between larger movements and smaller movements within its sensing zones, supporting responsive operation in frequently occupied areas.

The integrated zero-crossing switching technology helps reduce electrical stress when switching compatible lighting loads, including LED and fluorescent lamps. The adjustable ambient light threshold and switch-off delay allow the operating behaviour to be matched to the installation, while the external push-button connection provides additional control when manual timed activation is required.

Typical Applications

• Residential corridors and entrance halls.
• Stairways and communal circulation areas.
• Bathrooms, toilets and washrooms.
• Commercial office lighting installations.
• Hotel corridors and hospitality facilities.
• Storage rooms and utility spaces.
• Public building circulation areas.
• Automatic LED lighting control systems.
• Energy-efficient lighting refurbishment projects.
• Recessed wall-mounted movement detection installations.