Finder 18.21.0.024.0300 is a 24 V DC PIR movement detector with a 110° detection angle and one normally open potential-free relay output contact rated at 10 A for building automation and industrial control applications.
£97.53
The Finder 18.21.0.024.0300 is a compact PIR movement detector with a 24 V DC supply, designed for automatic control applications in building automation, industrial control and low-voltage electrical systems. Part of Finder's Series 18, it combines passive infrared movement detection with an output contact for switching compatible loads or providing an occupancy signal to a control system.
Operating from a nominal 24 V DC supply, the 18.21.0.024.0300 features one normally open output contact rated at 10 A. The potential-free relay output allows the movement detector to interface with suitable control circuits independently of its DC supply, making it useful for automation systems, relays, contactors and lighting control arrangements.
The PIR detector provides a wide 110° detection angle and incorporates adjustable timing and ambient light settings so that operation can be matched to the installation. Its compact surface-mounted design makes it suitable for locations where reliable automatic movement detection is required from a low-voltage DC-powered sensor.
A 24 V DC PIR movement detector is particularly useful in industrial and building automation systems where low-voltage DC control power is already available. The Finder 18.21.0.024.0300 detects changes in infrared radiation caused by movement within its sensing area and operates its relay output according to the configured timing and light-level settings.
Because the detector provides a potential-free output contact, the relay output can be incorporated into an appropriate control circuit without being electrically tied to the detector's 24 V DC supply. This makes the device suitable for signalling PLC inputs or operating compatible relays, contactors and automatic lighting control circuits within the specified contact ratings.
| Current | 10 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | Finder |
| Series | Series 18 |
| Model | 18.21 |
| Manufacturer part number | 18.21.0.024.0300 |
| Product type | PIR movement detector |
| Detection technology | Passive infrared (PIR) |
| Nominal supply voltage | 24 V DC |
| Output type | Relay contact |
| Contact configuration | 1 NO |
| Number of poles | 1 |
| Rated output contact current | 10 A |
| Output contact | Potential-free |
| Detection angle | 110° |
| Timing | Adjustable |
| Ambient light threshold | Adjustable |
| Contact material | AgSnO2 |
| Terminal type | Screw terminals |
| HS Code | 85365080 |
| Country of Manufacture | Italy |
The Finder 18.21.0.024.0300 is a PIR movement detector used to detect occupancy or movement and operate a relay output for compatible lighting, automation or control circuits.
The 18.21.0.024.0300 is designed for a nominal 24 V DC supply, making it suitable for low-voltage industrial and building automation systems.
The detector provides one normally open potential-free relay contact with a rated contact current of 10 A.
Its potential-free relay output can be used as an input signal for a compatible PLC or building automation controller, provided the connected circuit remains within the electrical ratings specified by Finder.
The Finder 18.21 PIR movement detector provides a 110° detection angle, allowing broad coverage for automatic movement and occupancy detection applications.
Finder Series 18 PIR movement detectors provide practical automatic control for building and industrial installations, with the 18.21.0.024.0300 combining a 24 V DC supply, adjustable PIR detection and a potential-free 10 A relay output for flexible control integration.
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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...
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...