Simplex 4098-9401 Fixed Temperature Heat Detector

Simplex 4098-9401 heat detectors use a fast response, thermistor-based design to provide temperature sensing that quickly, accurately, and consistently identifies when fixed temperatures are exceeded. Also, the Simplex 4098-9401 fixed temperature sensing thermistor readily tracks the local ambient temperature. Besides, this eliminates the time required to melt a lead pellet or heat a bimetallic element as occurs in mechanical heat detector designs and provides the required heat detection for most applications.

In general, rate-of-rise detection is determine by comparing two thermistor responses. By combining accurate thermistors with proper physical placement, this patented rate-of-rise detection design achieves a high level of performance not normally available with mechanical detection.

Features / Specifications

• Thermistor based design is inherently rate compensate due to minimal thermal lag
• Easily tested, self-restoring operation with repeatable accuracy
• Alarm indicating LED located on the detector
• Currently limited alarm that is compatible with two-wire initiating device circuits
• Wiring attaches directly to detector terminals
• Detector mounts onto the mechanical adapter plate
• Humidity Range: 10% to 95% RH, not intended for outdoor applications
• Storage Temperature: 0° to 140° F (-18° C to 60° C)
• Rate-of-Rise Operation:  Meets FM requirements for operation between 15° and 25° F/min (8.33° and 13.88° C/min)