Honeywell Home Intrusion 502 Thermal Detector 135F

Product Description

The HONEYWELL HOME INTRUSION 502 is a fixed-temperature thermal detector rated for actuation at 135 degrees F. Thermal detectors respond to heat rather than smoke or combustion byproducts, triggering an alarm when the ambient air temperature at the sensor reaches the rated threshold. The 502 is designed for integration into hardwired intrusion and fire-alarm detection systems. Installation is typically performed by licensed alarm technicians or electricians working within the scope of life-safety and security system codes. This unit is sold individually and carries UL listing.

Fixed-temperature thermal detectors like the 502 are commonly deployed in environments where smoke detectors generate excessive false alarms due to dust, fumes, or cooking vapors — including garages, attics, boiler rooms, and kitchen areas. The 135 degrees F rating places this device in the standard fixed-temperature class for residential and light-commercial security and fire-alarm panel systems. It is part of the Ademco-compatible product line and is noted as a discontinued SKU; availability reflects remaining stock.

Key Features

• Fixed-temperature actuation at 135 degrees F
• UL listed for use in life-safety and security detection applications
• Thermal detection method reduces nuisance false alarms in high-particulate environments
• Sold as a single unit (each)
• Designed for compatibility with Ademco hardwired detection systems

Compatibility

Designed as an OEM-style replacement thermal detector for Ademco-compatible hardwired intrusion and fire-alarm panel systems. Verify panel zone compatibility and wiring configuration before installation.

Installation Notes

Installation should be performed by a licensed alarm technician or electrician familiar with NFPA 72 and applicable local fire-alarm codes. Power down and disarm the alarm panel before removing or wiring any detection device. Follow the panel manufacturer wiring diagram for end-of-line resistor placement and zone configuration. Do not test actuation by applying direct heat sources to the detector housing.