Duct air quality sensor for detection of CO2, VOC, optional temperature and Humidity. Designed for duct mounted applications with up to 4 0..10 V outputs. Replaces LK-SX CO2+VOC in the newly developed enclosure USE-M.

Measuring valuesCO2, VOC, temperature + humidity (depending on the device), each output can be set to get a variable mix of CO2 and VOC by configuration
Output voltage2x/3x/4x 0..10 V or 0..5 V (live-zero configuration via Thermokon USEapp)
Output ampereAA: 2x 4..20 mA
Output switch contactRelay: 2x floating contact NO for 24 V ~ or 24 V = / 3 A, (optional)
Network technologyRS485 Modbus
Power supply15..35 V = or 19..29 V ~ SELV
Power consumptionmax. 2,5 W (24 V =) | 4,3 VA (24 V ~)
Measuring range temp.-40..+60 | 0..+50 | -20..+80 | -15..+35, default setting: 0..+50 °C, optionally configured via Thermokon USEapp
Measuring range humidity0..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 configured via Thermokon USEapp
Measuring range CO20..2000 ppm, 0..5000 ppm (optionally configured via Thermokon USEapp)
Accuracy temperature3xV | 4xV: ±1% of measuring range (typ. at 21 °C)
Accuracy humidity±2% between 10..90% rH (typ. at 21 °C)
Accuracy CO2±50 ppm +3% of measured value (typ. at 25 °C)
Calibrationself-calibration, CO2: Dual Channel
SensorVOC sensor (heated metal oxide semiconductor), CO2: NDIR (non-dispersive, infrared)
DisplayLCD 29x35 mm with RGB backlight, (optional)
Enclosureenclosure USE-M, PC, pure white, LCD: cover PC, transparent, with removable cable entry
ProtectionIP65 according to EN 60529
Cable entryM16 for wire max. Ø=8 mm, Relay/3xV/4xV: M20 for wire max. Ø=8 mm incl. seal insert for double cable entry for wire max Ø=6 mm, RS485 Modbus: M25 with fourfold cable entry for wire with max. Ø=7 mm, removable
Connection electricalremovable plug-in terminal, max. 2,5 mm², RS485 Modbus terminal: removable plug-in terminal, max. 1,5 mm²
PipePA6, black, Ø=19,5 mm, length 180 mm, type VV|AA: length 150 mm
Filterstainless steel wire mesh
Ambient condition0..+50 °C, max. 85% rH short term condensation
Mountinginstallation is also possible using mounting base
Delivery contentsMF20 flange included
Notesmixed gas sensors detect gases and vapours which can be oxidised (burnt): Body odours, tobacco smoke, exhalations emitted by materials (furniture, carpets, paint, glue ...)

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

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