LK+

The maintenance-free, multifunctional duct air quality sensor measures CO2 content and mixed gas and additionally temperature and humidity (relative, absolute, enthalpy, dew point). The devices with relay output for a 2-point controller or a 2-stage 2-point controller and color-changing LCD display allow a wide range of applications. Depending on the model, the sensor can be individually configured via Thermokon USEapp. Tool-free opening, closing and wiring as well as removable cable entries ensure quick and easy installation.

Measuring values CO2, VOC, temperature + humidity (depending on the device), types CO2+VOC: each output can be set to get a variable mix of CO2 and VOC by configuration via Thermokon USEapp
Output voltage 1..4x 0..10 V or 0..5 V (adjustable via jumper; live-zero configuration via Thermokon USEapp), min. load 10 kΩ
Output ampere 1x/2x 4..20 mA, max. load 500 Ω
Output switch contact Relay: 2x floating contact NO for 24 V ~ or 24 V = / 3 A, (optional)
Network technology RS485 BACnet (MS/TP), RS485 Modbus
Power supply 15..35 V = or 19..29 V ~ SELV, A: 15..35 V = SELV
Power consumption max. 2,5 W (24 V =) | 4,3 VA (24 V ~)
Measuring range temp. -40..+60 °C | 0..+50 °C | -20..+80 °C | -15..+35 °C, default setting: 0..+50 °C, optionally configurable via Thermokon USEapp
Measuring range humidity 0..100% rH non-condensing, enthalpy: 0..85 KJ/kg, absolute humidity: 0..50 | 0..80 g/m³, dew point: 0..+50 | -20..+80 °C, optionally configurable via Thermokon USEapp
Measuring range CO2 0..2000 ppm, RS485 Modbus: 0..5000 ppm
Accuracy temperature ±0,5 K (typ. at 21 °C within default measuring range)
Accuracy humidity ±2% between 10..90% rH (typ. at 21 °C)
Accuracy CO2 ±50 ppm +3% of measured value (typ. at 21 °C, 50% rH)
Calibration self-calibration, CO2: Dual Channel
Sensor VOC sensor (heated metal oxide semiconductor), CO2: NDIR (non-dispersive, infrared)
Display LCD 29x35 mm with RGB backlight, (optional)
Enclosure enclosure USE-M, PC, pure white, LCD: cover PC, transparent, with removable cable entry
Protection IP65 according to EN 60529
Cable entry Flextherm M16 for wire Ø=3..7 mm, 3xV/4xV: M20 for wire max. Ø=8 mm incl. seal insert for double cable entry for wire max Ø=6 mm, removable, Relay/BUS: M25 with fourfold cable entry for wire with max. Ø=7 mm
Connection electrical removable plug-in terminal, max. 2,5 mm², BUS terminal: removable plug-in terminal, max. 1,5 mm²
Pipe PA6, black, Ø=19,5 mm, length 180 mm, types 100: length 100 mm, types without temperature: length 150 mm; types 100: 70 mm
Filter stainless steel wire mesh
Ambient condition 0..+50 °C, max. 85% rH short term condensation
Mounting installation is also possible using mounting base
Delivery contents MF20 flange included
Notes mixed gas sensors detect gases and vapours which can be oxidised (burnt): Body odours, tobacco smoke, exhalations emitted by materials (furniture, carpets, paint, glue ...)
Contact

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Thermokon Sensortechnik GmbH
Platanenweg 1
35756 Mittenaar
Tel.: +49 2778 6960-0


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