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HD37 - CO2/CO2 and Temperature Transmitters
Brand: Delta OHM S.R.L.The transmitters of the HD37 series are used mainly in air quality control by measuring CO2 (Carbon Dioxide) in the ventilation systems.
This allows you to vary the number of air change per hour according to ASHRAE and IMC norms.
The purpose is twofold: to have a good air quality in the presence of people and to save energy, increasing or decreasing parts of air per hour, depending on the air quality set.
The use is for environments where there is overcrowding of people, discontinuous crowding, cafeterias, auditoriums, schools, hospitals, greenhouses, livestock breeding, etc.
1 - 12 of 36 Part Numbers
HD377BT
- Analog Output - 4-20mA
- Sensor Output - CO2+Temperature output
- Measuring Range - CO2 0-2000 ppm
HD377BT.1
- Analog Output - 4-20mA
- Sensor Output - CO2+Temperature output
- Measuring Range - CO2 0-5000 ppm
HD377BT0.1
- Analog Output - 4-20mA
- Sensor Output - CO2+Temperature output
- Mounting - 120mm air inlet from ducts
- Measuring Range - CO2 0-2000 ppm
HD377BT0.1.1
- Analog Output - 4-20mA
- Sensor Output - CO2+Temperature output
- Mounting - 120mm air inlet from ducts
- Measuring Range - CO2 0-5000 ppm
HD377BT0.2
- Analog Output - 4-20mA
- Sensor Output - CO2+Temperature output
- Mounting - 320mm air inlet from ducts
- Measuring Range - CO2 0-2000 ppm
HD377BT0.2.1
- Analog Output - 4-20mA
- Sensor Output - CO2+Temperature output
- Mounting - 320mm air inlet from ducts
- Measuring Range - CO2 0-5000 ppm
HD377BTV
- Analog Output - 4-20mA
- Sensor Output - CO2+Temperature output
- Mounting - Wall Mounted
- Measuring Range - CO2 0-2000 ppm
HD377BTV.1
- Analog Output - 4-20mA
- Sensor Output - CO2+Temperature output
- Mounting - Wall Mounted
- Measuring Range - CO2 0-5000 ppm
HD37BT
- Analog Output - 4-20mA
- Sensor Output - CO2 output
- Measuring Range - CO2 0-2000 ppm
HD37BT.1
- Analog Output - 4-20mA
- Sensor Output - CO2 output
- Measuring Range - CO2 0-5000 ppm
HD37BT0.1
- Analog Output - 4-20mA
- Sensor Output - CO2 output
- Mounting - 115mm air inlet from ducts
- Measuring Range - CO2 0-2000 ppm
HD37BT0.1.1
- Analog Output - 4-20mA
- Sensor Output - CO2 output
- Mounting - 115mm air inlet from ducts
- Measuring Range - CO2 0-5000 ppm
1 - 12 of 36 Part Numbers
Specifications
Brand
CO2 Measurement Principle
- Double wave length infrared technology (NDIR)
CO2 Measurement Range
- 0-2000 ppm
- 0-5000 ppm
CO2 Accuracy
- f.s. 2000 ppm: ± (50 ppm +3 % of measurement)
- f.s. 5000 ppm: ± (50 ppm +4 % of measurement)
- (at 20° C, 50 %RH and 1013 hPa)
Power Supply
- 16-40 Vdc
- 24 Vac ± 10 %
Temperature Measurement Range (Models HD377BT and HD37V7BT)
- 0 +50° C
Temperature Accuracy (Models HD377BT and HD37V7BT)
- ± 0.3° C
Analog Outputs (According to the Model)
- 4-20 mA, RL 10 kΩ
Case Material
- ABS
Absorption
- < 2 W
Startup Stabilization Time
- 15 Minutes
- To guarantee the stated accuracy
Response Time τ63%
- 120 seconds
- Wind speed of at least 1 m/s
Temperature Effect %
- 0.2 %/°C CO2
- Typical value
Atmospheric Pressure Effect
- 1.6 %/kPa
- Deviation compared to the value at 101 kPa
Long-term Stability
- 5 % of the range / 5 years
- Typical value
Calibration
- At one point at 0 ppm
- 400 ppm clear air
- Automatic detection of theapplied CO₂ level
Operating Conditions
- -5 to +50° C
- 0 to 90 %RH
- Without condensation
Storage Conditions
- -10 to +60° C
- 0 to 90 %RH
- Without condensation
IP Electronics
- TV models: IP21
- TC models: IP65 (Probe Excluded)
Case Size
- 80 x 84 x 44 mm
- Probe excluded