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VCP Air Quality Sensor - VOC / RH / Temp

Air Quality (VOC) + Humidity (RH) + Temperature (T) sensor - QHT 24R
Part Number: QHT24
$216.00 ex GST
[$237.60 inc GST]
Product Files

QHT 24R is an intelligent combined sensor for Air Quality (VOC), Humidity (RH) and Temperature (T) with analogue outputs, Modbus and LCD display.

The Air Quality sensor itself is a Mix Gases sensor with high sensitivity for Volatile Organic Compounds (VOC) such as carbon dioxide, carbon monoxide, ammonia, body odours, breath air, cigarette smoke etc.

QHT 24R have three selectable outputs 0-10 Vdc, 4-20 mA or 0-5 Vdc for each parameter of Air Quality (VOC), Humidity (rH) and Temperature (T), the outputs are corresponding to 0 to 1000 ppm, 0 to 100% RH and 0 to 100 degrees Celcius.

The intelligent sensor QHT 24R have Modbus RS485 Network connection,
Modbus RTU at 19.2k and 9600 baud

The LCD display show actual value for:
Air Quality (VOC), Humidity (rH) and Temperature (T):

  • Air Quality (VOC) LCD display reading is 0 to 1000 ppm:
    0 to 99 ppm = Fine
    110 ppm = Fair
    400 ppm = Poor
    600 ppm = Bad
  • Humidity LCD display reading is 0 to 100% rH
  • Temperature LCD display reading is 0 to 100 degrees Celcius

The intelligent sensor QHT 24R offers long term high stability and accuracy for all measured parameters; Air Quality (VOC), Humidity (rH) and Temperature (T)

QHT 24R can be used to ensure adequate ventilation while maximizing energy savings by ventilating at the optimum level, making these ideal for all types of ventilation in many applications.

The QHT 24RS is same as the QHT 24R but without set point buttons.
The QHT 24RS is mainly used in schools, hotels, offices etc.

Detectable VOC gases

• Cigarette smoke

• Automobile exhaust

• Breath air

• Carbon dioxide (CO)

• Carbon monoxide (CO)

• Solvent fumes

• Alcohol fumes

• Acetone

• Acrylonitrile

• Ammonia

• Benzene

• Chlorine

• Dimethyl amine

• Ethane

• Ethylene

• Ethylene oxide

• Formaldehyde

• Hydrogen

• Hydrogen sulfide

• Isobutane

• Methane

• Methanol

• Methyl chloride

• Methylene chloride

• Methyl ether

• Methyl acetate

• Methyl ethyl ketone

• n-Hexane 2

• n-Petane

• Propane

• R-11

• R-12

• R-502

• R-123

• Sulfur dioxide

• Vinyl chloride

QHT 24R is an intelligent combined sensor for Air Quality (VOC), Humidity (RH) and Temperature (T) with analogue outputs, Modbus and LCD display.

The Air Quality sensor itself is a Mix Gases sensor with high sensitivity for Volatile Organic Compounds (VOC) such as carbon dioxide, carbon monoxide, ammonia, body odours, breath air, cigarette smoke etc.

QHT 24R have three selectable outputs 0-10 Vdc, 4-20 mA or 0-5 Vdc for each parameter of Air Quality (VOC), Humidity (rH) and Temperature (T), the outputs are corresponding to 0 to 1000 ppm, 0 to 100% RH and 0 to 100 degrees Celcius.

The intelligent sensor QHT 24R have Modbus RS485 Network connection,
Modbus RTU at 19.2k and 9600 baud

The LCD display show actual value for:
Air Quality (VOC), Humidity (rH) and Temperature (T):

  • Air Quality (VOC) LCD display reading is 0 to 1000 ppm:
    0 to 99 ppm = Fine
    110 ppm = Fair
    400 ppm = Poor
    600 ppm = Bad
  • Humidity LCD display reading is 0 to 100% rH
  • Temperature LCD display reading is 0 to 100 degrees Celcius

The intelligent sensor QHT 24R offers long term high stability and accuracy for all measured parameters; Air Quality (VOC), Humidity (rH) and Temperature (T)

QHT 24R can be used to ensure adequate ventilation while maximizing energy savings by ventilating at the optimum level, making these ideal for all types of ventilation in many applications.

The QHT 24RS is same as the QHT 24R but without set point buttons.
The QHT 24RS is mainly used in schools, hotels, offices etc.

Detectable VOC gases

• Cigarette smoke

• Automobile exhaust

• Breath air

• Carbon dioxide (CO)

• Carbon monoxide (CO)

• Solvent fumes

• Alcohol fumes

• Acetone

• Acrylonitrile

• Ammonia

• Benzene

• Chlorine

• Dimethyl amine

• Ethane

• Ethylene

• Ethylene oxide

• Formaldehyde

• Hydrogen

• Hydrogen sulfide

• Isobutane

• Methane

• Methanol

• Methyl chloride

• Methylene chloride

• Methyl ether

• Methyl acetate

• Methyl ethyl ketone

• n-Hexane 2

• n-Petane

• Propane

• R-11

• R-12

• R-502

• R-123

• Sulfur dioxide

• Vinyl chloride

Technical data

Supply voltage 12-24 Vac/dc +/-20%
Power consumption 55mA at 24 Vdc
Operation temperature -30 to +70°C
Ambient humidity range 0-100% rH
Material, enclosure Flame proof plastic
Enclosure rating IP 31
Colour White
Weight 200 g (approx.)

Accuracy

The Air Quality (VOC) sensor will react differently according to the type of gas, the humidity accuracy
is +/- 3% rH and temperature accuracy is +/- 0.2°C.

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