USER-FRIENDLY MEASURING DEVICES carbon dioxide transmitters cdt-mod-2000 duct series CO2 transmitters with temperature output for duct that use Modbus serial communication protocol The CDT-MOD-2000 Duct series air quality transmitters are engineered for building automation systems in the HVAC/R industry. The CDT-MOD-2000 Duct series measures carbon dioxide (CO2), utilizing the industry standard NDIR measurement principle, and temperature (T). Illuminated display ensures easy readability also from a distance. The CDT-MOD-2000 Duct has a screwless lid and an easily adjustable mounting flange that make the installation of the device easy. The CDT-MOD-2000 Duct series transmitters calibrate themselves automatically using ABCTM logic. The ABC™ logic requires that the space in which the transmitter is used needs to to be unoccupied for four hours per day so that the indoor CO2 concentration drops to the outside level. CDT-MOD-2000-DC Duct is a dual channel model with a measuring channel and a reference channel that makes a continuous comparison and the necessary adjustment accordingly. CDT-MOD-2000-DC Duct is also suitable for buildings that are continuously occupied. CDT-MOD-2000 Duct series devices include: • Separate Modbus output for each measurement parameter (CO2 and T) • Mounting flange • Clear backlit display CDT-MOD-2000 Duct series devices are commonly used to monitor: • CO2 and temperature levels of incoming and return air in ventilation system • CDT-MOD-2000-DC Duct series devices can also be used in applications where there is a constant source of carbon dioxide present (for example hospitals and greenhouses) Copyright HK Instruments 2017 www.hkinstruments.fi Datasheet Version 6.0 2017

CARBON DIOXIDE TRANSMITTERS CDT-MOD-2000 Duct Series SPECIFICATIONS Performance Measurement ranges: CO2: 400–2000 ppm Temperature: 0...50 °C Accuracy: CO2: ±40 ppm + 2 % of reading, DC model: 75 ppm or 10 % of reading (whichever is greater) Temperature: <0.5 ºC Technical Specifications Media compatibility: Dry air or non-aggressive gases Measuring units: ppm and °C Measuring element: CO2: Non-dispersive infrared (NDIR) Temperature: NTC10K Calibration: Automatic self-calibration ABC LogicTM or continuous comparison (DC) Environment: Operating temperature: 0...50 °C Storage temperature: -20...70...