Finder 18.21.8.230.0000 is a ceiling-mounted PIR movement detector with a 120–230 V AC supply, 10 A voltage output, 360° sensing, approximately 8 m detection diameter and adjustable timing and ambient light thresholds.
£80.60
The Finder 18.21.8.230.0000 is a compact PIR movement detector with voltage output, designed for automatic lighting control and occupancy detection in indoor environments. Part of Finder's Series 18, this surface-mounted detector combines passive infrared sensing with adjustable light-level and switch-off timing controls.
Operating from a 120–230 V AC, 50/60 Hz supply, the 18.21.8.230.0000 provides a voltage output for direct control of compatible loads. The switching system is rated at 10 A, while the PIR sensor provides 360° coverage with a detection area of approximately 8 m diameter at the recommended mounting height.
The detector offers an adjustable ambient light threshold of approximately 5–350 lx and an adjustable switch-off delay from 10 s to 12 min. Its compact ceiling-mounted construction, IP40 protection and operating temperature range of -10 °C to +50 °C make it a practical solution for automatic lighting in offices, corridors, hotels and other commercial buildings.
Ceiling-mounted PIR detectors provide effective coverage for rooms, corridors and circulation spaces by monitoring infrared changes caused by people moving through the sensing area. The Finder 18.21.8.230.0000 provides 360° detection across an approximately 8 m diameter area, making it well suited to central ceiling positions where broad coverage is required.
The integrated ambient light control allows the detector to inhibit unnecessary switching when sufficient natural or artificial light is already available. Combined with the adjustable 10 s to 12 min switch-off delay, this allows the installation to be configured for energy-efficient automatic lighting according to occupancy and local lighting conditions.
| Current | 10 A |
|---|---|
| Voltage | 230 V |
| Phase | Single Phase |
| Manufacturer | Finder |
| Series | Series 18 |
| Model | 18.21 |
| Manufacturer part number | 18.21.8.230.0000 |
| Alternative SKU | 182182300000 |
| Product type | PIR movement detector |
| Sensor technology | Passive infrared (PIR) |
| Mounting | Surface / ceiling mounting |
| Supply voltage | 120–230 V AC |
| Supply frequency | 50/60 Hz |
| Output type | Voltage output |
| Switching current | 10 A |
| Maximum switching power | 1000 W |
| Maximum LED switching power | 300 W |
| Maximum starting current | 100 A |
| Scanning angle | 360° |
| Detection area diameter | 8 m |
| Maximum frontal range | 4 m |
| Maximum lateral range | 4 m |
| Recommended mounting height | 2.8 m |
| Switch-off delay | 10 s to 12 min |
| Ambient light threshold | 5–350 lx |
| Protection rating | IP40 |
| Operating temperature | -10 °C to +50 °C |
| Connection type | Screw terminals |
| Diameter | 75.1 mm |
| Height | 50.5 mm |
| Colour | White |
| Material | Thermoplastic |
| RoHS | Compliant |
| EAN | 8012823329291 |
| HS Code | 85365080 |
| Country of Manufacture | Italy |
The Finder 18.21.8.230.0000 is a ceiling-mounted PIR movement detector used for automatic control of compatible lighting and electrical loads according to movement and ambient light conditions.
The detector operates from a 120–230 V AC, 50/60 Hz supply, making it suitable for common mains-powered lighting control installations.
The 18.21.8.230.0000 is the voltage-output version. The 18.21.8.230.0300 variant provides a potential-free output contact, so the correct version should be selected according to the required control circuit.
The detector provides 360° PIR coverage with a detection area approximately 8 m in diameter under the specified mounting conditions, with a recommended mounting height of approximately 2.8 m.
The 18.21.8.230.0000 has an IP40 protection rating and is intended for protected indoor installations. It should not be treated as an outdoor weatherproof PIR detector.
Finder Series 18 movement detectors combine PIR sensing, adjustable timing and ambient light control for efficient automatic lighting, with the 18.21.8.230.0000 providing 360° ceiling-mounted detection and a mains voltage output for compatible loads.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...