LK+ CO2+VOC
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), each output can be set to get a variable mix of CO2 and VOC by configuration |
|---|---|
| Output voltage | 2..4x 0..10 V or 0..5 V (adjustable via jumper; live-zero configuration via Thermokon USEapp), min. load 10 kΩ |
| Output ampere | AA: 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), LON FT (free topology), RS485 Modbus |
| Power supply | 15..35 V = or 19..29 V ~ SELV, AA: 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, BUS: 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, 1015 hPa) |
| 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, indicating air quality by switching display color (traffic light function ‘TLF’) |
| Enclosure | enclosure USE-M, PC, pure white, LCD: cover PC, transparent |
| Protection | IP65 according to EN 60529 |
| Cable entry | Flextherm M20 for wire Ø=4,5..9 mm, Relay/BUS: M25 with fourfold cable entry for wire with max. Ø=7 mm, removable |
| 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, type VV|AA: length 150 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 ...) |