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Dextra REAF 2DSI (E) 3CW Recessed PIR Sensor

Original price was: £62.95.Current price is: £29.95. £35.94 Inc VAT

The

Dextra REAF 2DSI (E) 3CW

is a recessed, flush-mounted Passive Infrared (PIR) occupancy and daylight sensor designed for energy-efficient lighting control in commercial and industrial applications.

This sensor offers both presence detection (turning lights on/off based on motion) and daylight regulation (dimming the lights to maintain a constant lux level when sufficient natural light is available). It provides a 2-wire digital, polarity-free DSI (Digital Serial Interface) output for controlling compatible dimmable ballasts or LED drivers.
The sensor is typically mounted at a maximum height of 3 meters and is programmable for off-delay times and light levels using a separate, handheld infrared programmer.

8 in stock

Estimated Standard Delivery May 5, 2026 - May 6, 2026

Description

DEXTRA REAF2DSI (E) 3CW Recessed PIR Sensor

Product Overview: Dextra REAF 2DSI (E) 3CW

The Dextra REAF 2DSI (E) 3CW acts as an advanced hub for commercial lighting control. Consequently, it slashes energy costs by automating light levels based on real-time room data.

Key Performance Features

  • Dual-Sensing Technology: First, the PIR sensor tracks occupancy. Meanwhile, the photocell monitors natural light to maintain consistent brightness.

  • DSI Digital Control: In addition, the unit outputs a digital signal. Therefore, it can dim or brighten up to nine separate ballasts or drivers simultaneously.

  • Emergency Integration: Furthermore, the “(E)” designation confirms emergency circuit monitoring. As a result, the sensor integrates seamlessly into safety systems.

  • Rapid Connectivity: Similarly, the “3CW” variant includes a 3-pole plug. Because of this, installers can complete “plug and play” setups in seconds.

Installation & Technical Specs These instructions and technical details are specifically for the Dextra REAF 2DSI (E) 3CW Recessed PIR Sensor.
  • Detection Range: The sensor covers a wide area. Specifically, the floor diameter measures 2.4 times the mounting height.
  • Ceiling Fitment: It fits into a 74mm cut-out. However, you must ensure a 125mm ceiling void for proper clearance.
  • Custom Adjustments: You can modify the off-delay (5–35 minutes) and lux levels (50–5000). Nevertheless, these changes require an external infrared remote.
  • Build Standards: It uses flame-retardant PC/ABS materials. Additionally, the IP4X rating protects the internal components from solid objects.
Essential Requirement
Finally, please note that this unit contains no physical dials. Accordingly, you must use a Dextra REA BP or REA DP programmer to commission the device.