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Modbus RTU
P/PI control
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HDK duct CO2 transmitter
Produal HDK
HDK transmitters are designed to detect and monitor CO₂, temperature, and relative humidity in ventilation ducts. The CO₂ sensor self-calibrates regularly using the ABCLogic™ function, eliminating the possibility of long-term misalignment.
HDK transmitters are designed to detect and monitor carbon dioxide concentration, temperature, and humidity within ventilation ducts. The transmitter data can be used for demand-based ventilation control, for example.
Measurement values scroll across the display of the N model. The desired value can be locked for continuous viewing.
The device uses an automatic CO₂ measurement calibration function (ABC algorithm). This function eliminates potential long-term deviations. The automatic calibration function can be deactivated using the ML-SER tool.
The control output can be set to a specific measurement value or to the maximum value selected from all available values. The controller settings can be changed using the ML-SER tool.
Power supply
24 V CA/CC (22 - 28 V), < 2 VA
Measurement/s
CO₂ and temperature. Humidity (RH models)
Units of measurement
ppm, °C y % rH (models -RH)
Measuring range
0-2000 ppm, 0-10,000 ppm (10K models) 0-50 °C 0-100% relative humidity (-RH models)
Accuracy / Resolution
CO₂: (25 °C) Tipo ±40 ppm +3 % de lectura (calibración automática) (25 °C), modelos 10K - Tipo ±200 ppm +3 % de lectura (calibración automática) Temperatura - ±0,5 °C Humedad - ±2 % HR
Prove type
Ø10 mm x 110 mm; duct insulation < 75 mm
Output signal
0 - 10 V / 2 - 10 V / 0 - 5 V, < 2 mA
Control signal
P / PI (Configuration using ML-SER tool)
Communication
Modbus RTU (models -M)
Temperature
0 - 50 °C
Ambient humidity
0-85% relative humidity (non-condensing)
Environmental protection
IP54, cable entry downwards
Dimensions
105 x 104 x 155 mm
HDK
Duct transmitter/controller, CO₂ and temperature measurement, range 0 to 2000 ppm
HDK-N
Duct transmitter/controller, CO₂ and temperature measurement, display, range 0 to 2000 ppm
HDK-RH
Duct transmitter/controller, CO₂, temperature and humidity measurement, 0 to 2000 ppm range
HDK-M
Modbus duct transmitter/controller, CO₂ and temperature measurement, 0 to 2000 ppm range
HDK 10K
Duct transmitter/controller, CO₂ and temperature measurement, range 0 to 10,000 ppm
HD-R
Relay option, 24 V AC / 1 A
CE certificate
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