Duct Air Quality (VOC) transmitter VOCD-series

• Modbus RS485
• LCD Display
• 1 x relay output , can be set individually
• 2 x relay outputs , can be set individually
• Buzzer

0V or 4mA:  BEST, Clean Air
1V or 5.6mA:  STANDARD, calibrated level, reference level
10V or 20mA:  WORST, polluted air

In normal conditions, base level is equals to 1V.

Lower than 1V is better than calibrated situation.
In some cases, indoor condition may be better than calibrated level.

Higher than 1V is showing polluted air level.
Pollution is measured from 1V to 10V.

Sensitivity for VOC.
Higher response for VOC gasses at HIGH sensitivity.
10V of HIGH is equal to 4V of LOW.
10V of MEDIUM is equal to 6V of LOW.
1V is same for all sensitivities.
Example:  3.0V @ LOW  ==  4.6V @ MEDIUM  ==  7.0V @ HIGH

• Cigarette smoke
• Automobile exhaust
• Breath air
• Carbon monoxide (CO)
• Solvent fumes• Alcohol fumes
• Acetone
• Acrylonitrile
• Ammonia
• Benzene
• Chlorine
• Dimethyl amine
• Ethane
• Ethanol
• Ethylene
• Ethylene oxide
• Formaldehyde
• Hydrogen
• Hydrogen sulfide
• Isobutane
• Methane
• Methanol
• n-Hexane 2
• n-Petane
• Propane
• Sulfur dioxide

VOCD 51
Duct Air Quality (VOC) transmitter
VOC output 1: 4-20 mA
VOC output 2: 0-10 Vdc

VOCD 51 M
Duct Air Quality (VOC) transmitter
VOC output 1: 4-20 mA
VOC output 2: 0-10 Vdc
Modbus RS485 communication

VOCD 51 MDR2B
Duct Air Quality (VOC) transmitter
VOC output 1: 4-20 mA
VOC output 2: 0-10 Vdc
Modbus RS485 communication, LCD Display, 2 x relay outputs and Buzzer.

See data sheet for wide range of different combinations.