The 52051E and 52051HTE are analogue addressable fixed-temperature heat sensors that use low-mass thermistors and microprocessor technology for fast response and precise, linear temperature detection. Their linear sensing characteristics allow accurate temperature signaling across a range from 58°C (Class A1S) to 78°C (Class BS).
The 52051RE utilizes the same thermistor and microprocessor design to trigger an alarm when the temperature rises faster than 10°C per minute (typical) or when it exceeds a threshold of 58°C. With the Series 200 Advanced Protocol, any model can be software-configured as a fixed 58°C detector, a fixed 78°C detector, or a 58°C detector with rate-of-rise functionality. For backwards compatibility and approval continuity, all three configurations remain available as separate part numbers.
All three heat sensors feature sensing elements that are fully controllable via the Series 200 Advanced Protocol. This allows the fire panel to adjust sensitivity thresholds, providing the flexibility to adapt the detectors to the evolving requirements of the protected environment.
Key Features:
Supports the Series 200 Advanced Protocol, allowing customization of heat thresholds to match specific risk profiles
Available with or without single-pole short-circuit isolation, with status monitoring via the Series 200 Advanced Protocol
Tri-colour LED indicators (red, green, and amber)
Rotary decade address switch
Pure white finish to complement modern interiors
100% mechanical and electrical backwards compatibility
Redesigned base for simplified installation and aesthetic integration