The D12 Toxic Gas Transmitter has the option to add an auto-test generator, which verifies the function of the transmitter.
The way the auto-test generator functions is a small amount of gas is exposed to the sensor to verify that it will react. This is set up on a prearranged schedule and three attempts are made to verify response. If the sensor does not respond on the third attempt, a fault alarm is triggered. The test is performed at a specific time of day (that is user set and can be changed to best fit your schedule), and can be schedule to repeat every 1 to 14 days. The auto test can also be triggered manually at any time and will not affect the set schedule. This is a great way to ensure that you sensor is still working accurately and that in an emergency situation, that the sensor would detect the hazardous gas.
The Auto-Test Generator can be easily added at any time to the standard integral sensor holder on the D12. The Auto-Test unit is available in 5 types; Chlorine, Ammonia, Carbon Monoxide, Hydrogen Sulfide, and Sulfur Dioxide but can be used with the a few different types of sensors. See the table below for the compatible generators and sensors:
| Auto-test Generator | Generator Type |
Compatible Sensors |
| 00-1239 | Chlorine (Cl2) | Bromine (Br2) |
| Chlorine (Cl2) | ||
| Chlorine Dioxide (ClO2) | ||
| Flourine (F2) | ||
| Ozone (O3) | ||
| Hydrogen Flouride (HF) | ||
| Nitrogen Dioxide (NO2) | ||
| Iodoine (I2) | ||
| Acid Gas | ||
| 00-1240 | Ammonia (NH3) | Ammonia (NH3) |
| Dimethylamine (DMA) | ||
| 00-1241 | Carbon Monoxide (CO) | Carbon Monoxide (CO) |
| 00-1243 | Hydrogen Sulfide (H2S) | Hydrogen Sulfide (H2S) |
| Hydrogen Chloride (HCl) | ||
| 00-1244 | Sulfer Dioxide (SO2) | Sulfer Dioxide (SO2) |
| Hydrogen Cyanide (HCN) |
