The ESL 449/448 Series self-diagnostic, four-wire smoke detectors continually monitor their own sensitivity and operational status, and provide a visual trouble indication if they drift out of sensitivity range or fail internal diagnostics. This unique, patented technology meets NFPA 72 field sensitivity testing requirements without the need for external meters.
The ESL 449/448 Series self-diagnostic, four-wire smoke detectors continually monitor their own sensitivity and operational status, and provide a visual trouble indication if they drift out of sensitivity range or fail internal diagnostics. This unique, patented technology meets NFPA 72 field sensitivity testing requirements without the need for external meters.
| Weight | 0.3 lbs |
|---|---|
| Dimensions | 2.00 × 4.00 × 4.00 in |
| Detection Method | Fixed Temperature, Photoelectric, Rate-of-Rise |
| Thermal Rating | 135°F |
| Production Status | Obsolete |
| Brand |
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| Weight | 0.3 lbs |
|---|---|
| Dimensions | 2.00 × 4.00 × 4.00 in |
| Detection Method | Fixed Temperature, Photoelectric, Rate-of-Rise |
| Thermal Rating | 135°F |
| Production Status | Obsolete |
| Brand |
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