VOC GAS SENSOR Model C‑21 - C‑21

  • VOC GAS SENSOR Model C‑21
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• Allow at least 5 minutes warm‑up.
• Read all instructions in this manual.
• Keep instrument dry. Never let water or other liquids into the sensor.
• Do not drop the instrument or subject It to continuous vibration.

  • Model Number: C‑21
  • Data Sheet: Date Sheet File
Quantity:
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Product Specification

VOC GAS SENSOR Model C‑21 General:

The model C‑21 is a solid‑state gas monitor capable of sensing a variety of gases and vapors. The ones it is generally sensitive to are called VOCS (volatile organic compounds),and the most common application of the C‑21 is for solvent vapors. Common examples are paint thinners, dry cleaning fluids, cleaning solvents, and gasoline vapors. The instrument does not respond to carbon dioxide or radon, and has only a weak response to carbon monoxide. The C‑21 is self‑contained except for its AC adapter power module.The instrument also has an audio alarm and has outputs to external alarms, data loggers,calibration equipment, etc. 


VOC GAS SENSOR Model C‑21 safety features :

Enclosure: Self‑extinguishing ABS plastic. Sensor: Heated element is flame arrestor protected. Electrical: (a) Circuits operate at 24 volts, 250 mA, or less with no high capacity inductors
or capacitors. (b) Self‑resetting fuse to protect against excess input current flow. (d)
Overvoltage protection diode barrier to protect against supply voltage surges, spikes,

overvoltage, and reverse polarities. 


VOC GAS SENSOR Model C‑21 precautions :

• Allow at least 5 minutes warm‑up.

• Read all instructions in this manual.
• Keep instrument dry. Never let water or other liquids into the sensor.
• Do not drop the instrument or subject It to continuous vibration.
• Do not store in high levels of dust.
• Do riot clean the instrument with cleaning chemicals or solvents. Clean it with a
damp cloth.
• Do not operate near heavy aerosols (spray) usage or where oxygen Is being
administered.
• Call a qualified electrician If you have any doubts about voltages, currents, electrical
practice, etc. 

VOC GAS SENSOR Model C‑21 parameter

First detects

Alarm

(First red bar)

TLV*

 

ppm

ppm

ppm

Acetone

45

2025

750

Benzene

510

2550

10

Diacetone alcohol

510

2550

50

Methylene chloride

810

4050

50

Methyl ethyl ketone

35

1520

200

Perchloroethylene

5

50

50

Toluene

3-5

15-25

50

Trichloroethylene

10-20

50-100

50


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