The ozone sensor unit is either of the following:
- Science Pump Corporation (SPC) Model ECC-6A ozone sensor
- EN-SCI, former Droplet Measurement Technologies (DMT) Model Z ozone sensor
The sensors are based on chemical reaction cells. The type of the sensors is electrochemical concentration cell (ECC). Air is sampled flow (by using a pump) and it goes to a reaction cell, in which the sampled ozone reacts in a solution, and the current developed in the reaction is detected and measured with an ozone interface. For more information on the ozone sensor units, see the manufacturer documentation in Related manuals.
The following figure shows the main parts of an SPC ECC-6A ozone sensor. Model Z ozone sensor is similar to the SPC sensor.
- 1
- Gas sampling pump
- 2
- Ozone sensor cathode
- 3
- Ozone sensor anode
- 4
- Wires for interface
- 5
- Air intake tube
- 6
- Motor
- 7
- Connector for pump battery
The anode and cathode cells are in a different order in the ECC-6A and Model Z. |
- 1
- Cathode
- 2
- Anode