Model S250 - Ionization Smoke Detector
From Smoke Detectors
The SST Model S250 Smoke Detector is a dual chamber ionization type detector designed to respond to the first traces of a fire by sensing both visible smoke and invisible products of combustion. A unique sensing chamber design insures maximum smoke response from any direction, even in air velocities up to 2000 feet per minute. It is designed for smoke detection in open areas or, when used with the optional duct housing, in air ducts. When installed with a suitable NOVA-5000 Detection System, the Model S250 may be used for Releasing Device Service.
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Product Details
The smoke detector is installed into its accessoiy base with a simple twist-lock action, which prevents unauthorized removal of the detector. Operating power is provided over the 2-wire detection circuit from the Control System. Proper operation of the detector is indicated by a blinking Light Emitting Diode (LED), which changes to a steady 'on' condition when smoke is detected. For installations where the detector is not visible (such as above a false ceiling), a remote LED may be connected to the unit. Special signal processing techniques are used to insure immunity to electrical interference and to verify the presence of smoke before an alarm is transmitted.
- Ionization Smoke Detector
- Conventional Type
- For Non-Hazardous Applications
Features and Benefits
- Ionization type Smoke Detector with dual Stainless Steel Ionization Chambers
- Suitable for operation in high air flow areas
- Locking feature for tamper resistance
- UL 268A listed for duct applications
- EMI/RFI resistant
- In-place sensitivity measurement
- Functional Test Capability without requiring Smoke or other chemicals
- Provides UL Sensitivity Test Feature
- Meets requirements of NFPA Standard 72
- Optional remote LED, remote Test Switch, Supplementary relay
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