TrueAlarm Ionization sensors use a single radioactive source with an outer sampling ionization chamber and an inner reference ionization chamber to provide stable operation under fluctuations in environmental conditions such as temperature and humidity. Smoke and invisible combustion gases can freely penetrate the outer chamber. With both chambers ionized by a small radioactive source [Am 241 (Americium)], a very small current flows in the circuit. The presence of particles of combustion will cause a change in the voltage ratio between chambers. This difference is measured by the electronics in the sensor base and digitally transmitted back to the control panel for processing.
Three levels of sensitivity are available for each ionization sensor: 0.5, 0.9, and 1.3% per foot of smoke obscuration.
TrueAlarm Ionization sensors use a single radioactive source with an outer sampling ionization chamber and an inner reference ionization chamber to provide stable operation under fluctuations in environmental conditions such as temperature and humidity. Smoke and invisible combustion gases can freely penetrate the outer chamber. With both chambers ionized by a small radioactive source [Am 241 (Americium)], a very small current flows in the circuit. The presence of particles of combustion will cause a change in the voltage ratio between chambers. This difference is measured by the electronics in the sensor base and digitally transmitted back to the control panel for processing.
Three levels of sensitivity are available for each ionization sensor: 0.5, 0.9, and 1.3% per foot of smoke obscuration.
| Weight | 0.2 lbs |
|---|---|
| Dimensions | 4.88 × 4.88 × 2.12 in |
| Manufacturer | Johnson Controls |
| Brand | |
| Type | Detector |
| Style | Plug-In |
| Detectable Medium | Smoke |
| Detection Method | Ionization |
| Production Status | Discontinued |
| Series |
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| Weight | 0.2 lbs |
|---|---|
| Dimensions | 4.88 × 4.88 × 2.12 in |
| Manufacturer | Johnson Controls |
| Brand | |
| Type | Detector |
| Style | Plug-In |
| Detectable Medium | Smoke |
| Detection Method | Ionization |
| Production Status | Discontinued |
| Series |
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