18.5K.9.030.0001 Finder PIR With KNX interface DC 30V

Why Choose the Finder 18.5K.9.030.0001 KNX Motion and Presence Detector?

The Finder 18.5K.9.030.0001 is an advanced KNX PIR motion and presence detector from the Finder Series 18 range, designed for intelligent lighting control and building automation. Powered directly by the KNX bus, this professional sensor detects movement and occupancy, enabling compatible KNX devices to respond automatically to room activity and ambient light levels.

Featuring a movement detection area of up to 64 m² and a dedicated presence detection area of 16 m² at a mounting height of 3 m, the Finder 18.5K.9.030.0001 is particularly suitable for offices, classrooms, meeting rooms, commercial buildings and other indoor spaces requiring responsive occupancy detection.

The detector incorporates dynamic brightness regulation, configurable logic functions and up to five KNX output datapoints. Its adjustable brightness threshold, presence sensitivity and switch-off delay allow building automation engineers to tailor lighting and other connected control functions to the requirements of individual rooms.

With a nominal 30 V DC KNX bus supply, IP40 protection and compatibility with ETS configuration software, the Finder 18.5K.9.030.0001 provides a flexible sensing solution for modern KNX building management installations.

Key Advantages

• Combined motion and presence detection for intelligent building automation.
• Native KNX bus connectivity for integration with compatible KNX installations.
• Up to 64 m² movement detection coverage at a 3 m mounting height.
• 16 m² presence detection zone for detecting smaller occupant movements.
• Dynamic brightness regulation supports energy-efficient lighting control.
• Up to five configurable KNX output datapoints for automation functions.
• Integrated logic functions enable more flexible control arrangements.
• Adjustable brightness threshold from 1 to 1,500 lx.
• Adjustable switch-off delay from 0.1 s to 18 h.
• Master/slave functionality supports extended detection arrangements.
• Direct KNX bus power eliminates the need for a separate mains supply to the sensor.
• Suitable for suspended ceiling, recessed ceiling and surface-mounted installation arrangements.
• ETS configuration enables commissioning within a KNX system.
• Supports lighting, HVAC and other compatible building automation functions.

Key Features

• Finder Series 18 KNX motion and presence detector.
• Manufacturer reference: 18.5K.9.030.0001.
• Detector technology: Passive infrared (PIR).
• Communication interface: KNX bus.
• Nominal supply voltage: 30 V DC.
• KNX bus operating voltage: 21–32 V DC SELV.
• Nominal current consumption: 10 mA.
• Movement detection coverage: 8 × 8 m at a 3 m mounting height.
• Presence detection coverage: 4 × 4 m at a 3 m mounting height.
• Maximum movement detection area: 64 m².
• Maximum presence detection area: 16 m².
• Brightness adjustment range: 1–1,500 lx.
• Adjustable switch-off delay: 0.1 s to 18 h.
• Dynamic lighting regulation based on detected conditions.
• Configurable logic functions for KNX automation.
• Up to five output datapoints for compatible load-control functions.
• Master/slave detection arrangements for extending coverage.
• Configurable brightness and detection sensitivity.
• KNX programming button for device commissioning.
• Protection rating: IP40.
• Operating temperature: −5 to +45 °C.

Intelligent Presence Detection and Dynamic KNX Lighting Control

Modern building automation systems increasingly rely on accurate occupancy detection to improve lighting efficiency, user comfort and operational flexibility. The Finder 18.5K.9.030.0001 combines motion sensing, presence detection and brightness measurement in a single KNX-compatible device, allowing connected automation equipment to respond to changing conditions within a room.

The detector uses passive infrared technology to identify changes associated with human movement. It provides two distinct detection areas: a wider 8 × 8 m movement zone and a more sensitive 4 × 4 m presence zone, both specified at a mounting height of 3 m. This arrangement supports applications ranging from detecting people entering a room to recognising smaller movements associated with seated occupants.

Its dynamic brightness regulation enables lighting control strategies that consider the available ambient light. By configuring the detector through KNX ETS software, installers can establish appropriate brightness thresholds and control responses for offices, classrooms, meeting rooms and other occupied spaces.

The adjustable brightness threshold covers 1–1,500 lx, while the switch-off delay can be configured from 0.1 s to 18 h. These settings allow the detector to be adapted to different activities and occupancy patterns. For example, a frequently occupied office may require a different delay and brightness threshold from a storage room or circulation area.

The up to five KNX output datapoints support flexible integration with compatible lighting controllers, actuators and building management devices. Additional logic functions enable more sophisticated automation arrangements, while master/slave functionality can be used to extend detection coverage across larger spaces.

Because the detector is powered directly from the KNX bus, it does not require an independent 230 V AC supply connection. The nominal 30 V DC bus supply and low current consumption make it suitable for decentralised KNX installations, provided the system power supply has sufficient capacity for all connected devices.

The Finder 18.5K.9.030.0001 is designed for indoor installation and has an IP40 protection rating. It is intended for building automation and occupancy-related control rather than safety-critical presence detection. Commissioning should include correct KNX addressing, parameter configuration and verification of the required detection zones.

Typical Applications

• KNX intelligent lighting control systems.
• Office occupancy detection and automatic lighting.
• Meeting rooms and conference facilities.
• Classrooms, colleges and educational buildings.
• Commercial building automation installations.
• Hotel rooms and shared indoor spaces.
• Hospitals and healthcare building lighting control.
• Reception areas and administrative offices.
• Energy-efficient lighting refurbishment projects.
• Occupancy-dependent HVAC control through compatible KNX equipment.
• Smart building management systems.
• Master/slave detection arrangements in larger rooms.
• Automatic lighting control in indoor circulation and common areas.