HD45/46 Transmitters and controllers for humidity, temperature and CO2

HD45/46 Transmitters and controllers for humidity, temperature and CO2

HD45/46 Transmitters and controllers for humidity, temperature and CO2
Measuring range 5÷98% RH 
Carbon dioxide 0÷5000 ppm
Measuring frequency 1 sample every 3 seconds
Serial output signal - analog - relay
Power supply 24Vac or 15÷35Vdc
Housing material ABS
Price on request

The models HD45 and HD46 are transmitters, indicators and controllers able to measure and monitor environmental parameters as follows:

  • Relative humidity (RH)
  • Temperature (T)
  • Carbon dioxide (CO2)
  • Temperature of the dew point

They monitor air quality of indoor environments such as buildings where there is a large number of people (hospitals, schools, workplaces, cafeterias, etc.), allowing, thanks to their analysis, to adjust the air conditioning systems with regard to the temperature and humidity, ventilation and the parts of air so as to obtain both a good air quality in accordance with ASHRAE and IMC regulations both energy savings..
Measuring relative humidity is obtained with a capacitive sensor with temperature compensation that ensures accurate and reliable measurement over time.
The temperature is measured with a sensor NTYC high precision.
The carbon dioxide is obtained with a special infrared sensor (NADIR technology) that ensures accurate and stable measurements for a long time.
There is a special membrane which protects the sensor from dust and atmospheric agents.
All instruments are factory calibrated and do not require further adjustment by the installer.

The installation is on the wall and sensors are all internal to the instrument.

Several versions are available:
  • Analog voltage 0÷10V
  • Current 4÷20mA
  • Serial port RS485 with MODBUS-RTU
The versions with relay give the possibility to directly control the environmental parameters measured when the thresholds are exceded set by the user. Their operation is very versatile and can be configured by the user on the whole measuring range.
Optional LCD allows simultaneous viewing of all the values measured by the instrument.
The models HD45 and HD45 BVR BAR are different becouse they indicate in an immediate way the level of air quality due to the ignition of LED indicators associated with graphic symbols.
All features can be configured quickly and intuitively via a PC connection.


  • Quick set-up and intuitive
  • Supplied standard configuration that makes them immediately operating
  • Configuarazioni customized
  • HD46 models equipped with keyboard (can be configured without PC)
  • Logging continuous measurements and stored data can be transferred to a PC
  • Contemporary vision of all sizes rilevated thanks to the LCD display (optional)



Technical Characteristics

Measuring range / adjustment:
    • 5÷98% [RH]
    Operating temperature:
      • -40÷+80 [°C]
      Outputs available:
        • 0÷10 [V]
        • 4÷20 [mA]
        • SPDT contact
        • RS485
        • [up to the model]
        Operating voltage [V]:
          • 15÷30 Vdc (3 wires Ex)
          • 24Vac
          Degree of protection:
            • IP40
              • EC Declaration of Conformity