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Secure Payment & Return Policies
Secure Payment & Return Policies
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FAQs - Frequently Asked Questions
FAQs - Frequently Asked Questions
- Regular price
- $438.00
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HDK - Duct CO2 Transmitter / Controller
Description: HDK transmitters are specifically engineered to detect and control carbon dioxide concentration, temperature, and humidity within ventilation ducts. This information is pivotal for demand-based ventilation control strategies. The device features an intuitive N model display where measurement values scroll, with the option to lock the desired value for continuous monitoring. Utilizing an automatic CO2 measurement calibration function (ABC algorithm), the device mitigates potential long-term drift, ensuring consistent accuracy over time.
The control output of the HDK transmitter can be configured according to a single measurement value or the maximum selection of all values. Controller settings are adjustable using the ML-SER tool for enhanced customization. Additionally, the transmitter can be equipped with a HD-R relay (24 Vac, 1 A) for expanded control capabilities.
Technical Specifications:
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Supply:
- 24 Vac/dc (22…28 V), < 2 VA
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CO2 Measurement:
- Range: 0...2000 ppm
- Range (10K models): 0...10000 ppm
- Accuracy (25 °C):
- Typical ±40 ppm +3 % from reading (automatic calibration)
- Typical ±200 ppm +3 % from reading (automatic calibration) for 10K models
- Long-term Stability/year: < 2 % FS (automatic calibration)
- Time Constant: < 2 min
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Temperature Measurement:
- Range: 0...50 °C
- Accuracy (25 °C): ±0.5 °C
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Humidity Measurement (RH models):
- Range: 0…100 %rH
- Accuracy (25 °C): ±2 %rH
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Measuring Probe:
- Diameter: Ø10 mm x 110 mm; duct insulation < 75 mm
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Outputs:
- 0...10 V / 2...10 V / 0...5 V, < 2 mA
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Cable Entry: M16
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Communication (M models): Modbus RTU
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Operating Conditions:
- Temperature: 0...50 °C
- Humidity: 0...85 %rH (non-condensing)
- Storage Temperature: -20...70 °C
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Wiring Terminals: 1.5 mm², tilted screw terminals
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Housing: IP54, cable entry downwards
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Dimensions (w x h x d): 105 x 104 x 155 mm
Part Numbers:
HDK - Co2-Sensor Duct
HDK-N - Co2-Sensor Duct+Display
HDK-RH - Co2-Sensor Duct+Rh
HDK-RH-N - Co2-Sensor Duct+Rh+Display
HDK-M - Co2 Transmitter Duct +Modbus
HDK-M-N - Co2 Transmitter Duct +Modbus +Disp
HDK-M-RH - Co2 Transmitter Duct +Modbus +Rh
HDK-M-RH-N - Co2 Transmitter Duct +Modbus+Rh+D
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