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Room Sensors Light/Motion


Ceiling-mounted sensor used for the measurement of brightness or ambient light levels. Depending on the prism (straight or diagonal), light levels can be detected reliably and selectively in living rooms, offices and work spaces. The sensor is adapted to the spectral sensitivity of human eyes and contributes to a demand-based efficient control of light and sunblinds/shading systems. The remote sensor can be connected to the enclosure with a conventional RJ45 cable, allowing for an easy installation even in hardly accessible locations. If two sensors are used, the average, minimum or maximal value of both brightness signals can be provided in addtion to the independent measurements of each sensor (configurable via Thermokon USEapp).

Application/type Ceiling sensor, Room sensor
Purpose Measure values
Measured values luminosity
Interface RS485 Modbus, RS485 BACnet, LON FT, Active, 0..5 V, 0..10 V, 4..20 mA, Switch contact
Configuration USEapp, uConfig, BUS, jumper, DIP switches, (depending on type)
Sensor ambient light sensor with precise optical filtering appropriate to the human eye
Output voltage 0..10 V or 0..5 V, 2x 0..10 V or 0..5 V, adjustable via jumper, live-zero configuration via app or uConfig, min. load 10 kΩ
Output current 4..20 mA, 2x 4..20 mA, max. load 500 Ω
Output switch contact 2x floating contact NO for 24 V ~ or 24 V = / 3 A
Network technology RS485 Modbus, RS485 BACnet (MS/TP), LON FT (free topology)
Data transmission RTU, half-duplex, baud rate 9.600, 19.200, 38.400 or 57.600, parity: none (2 stop bits), even or odd (1 stop bit)
Operating range temperature (°C) -25..+65
Operating range humidity max. 85% rH non-condensing
Measuring range light selectable from 6 ranges 0..200 lux | 0..1000 lux | 0..2 klux | 0..10 klux | 0..20 klux | 0..50 klux, optionally configurable
Accuracy light ±5% of measuring range, calibration via app / uConfig
Power supply 15..35 V = SELV, 19..29 V ~ SELV
Power consumption typ. 0,6 W (24 V =), max. 20 mA, max. 40 mA, 1,2 VA (24 V ~)
Material in touch with media prism: acrylic glass clear, straight (mainly for interior lighting), diagonal (mainly for outdoor lighting)
Enclosure USE-M, impact- and shock-resistant enclosure with quick-release cover, PC
Colour pure white
Protection (IP) IP30, enclosure IP65, according to EN 60529
Connection removable cable entry flextherm M20 for wire Ø=4,5..9 mm, removable cable entry M25 with fourfold cable entry for wire with max. Ø=7 mm, removable plug-in terminal, max. 2,5 mm², BUS max. 1,5 mm², relay max. 1,5 mm²
Connection cable patch cable, RJ45 plug, 2x patch cable, RJ45 plug
Length connection wire (m) 1,5, 3, 7,5, max. 10
Delivery content incl. mounting base enclosure USE-M pure white, incl. mounting set (screws and accessories)
Packaging length (mm) 146
Packaging width (mm) 128
Packaging height (mm) 91
Packaging case packaging
Device length (mm) 85
Device width (mm) 84
Device height (mm) 45
Option enclosure LCD 29x35 mm, RGB backlight
Comparison list