The System Sensor 5604 is a fixed temperature heat sensor designed for single circuit applications, activating at 194°F. This device is engineered with a robust thermoplastic housing that withstands environmental stress while maintaining consistent performance. The internal sensing element is precisely calibrated to ensure reliable response at the specified temperature threshold, making it suitable for use in residential and commercial fire alarm systems. Its compact form factor allows for easy installation in standard mounting bases, and the single circuit configuration simplifies wiring in conventional zones. The construction emphasizes durability and long-term stability.

The sensor uses corrosion-resistant materials and a sealed design to minimize false alarms caused by dust or humidity. The 5604 model is compliant with industry standards for fixed temperature detection, providing a dependable safety component. While the unit is not intended for rate-of-rise detection, its fixed temperature trigger offers clear and unambiguous activation at the set point. The device operates efficiently across a wide voltage range compatible with common fire alarm control panels.

Given its straightforward functionality, this heat sensor is ideal for areas where rapid temperature increases are not expected, such as attics, garages, or storage rooms. The affordable price point of this unit makes it a cost-effective choice for system expansion or replacement. The overall build quality reflects System Sensor's reputation for producing reliable life safety equipment. Each sensor undergoes rigorous testing before shipment to ensure consistent performance.

The exterior casing is designed with a low-profile appearance that blends into ceilings or walls. The sensing element is protected by a vented cover that allows air circulation while preventing physical damage. Installation is straightforward with color-coded wiring terminals. The 5604 is compatible with a wide range of System Sensor bases, allowing for seamless integration into existing setups.

The fixed temperature nature eliminates the need for complex adjustments, reducing installation time and potential errors. In summary, the System Sensor 5604 heat sensor delivers reliable fixed temperature detection at an affordable price. Its single circuit design and 194°F set point meet common safety requirements, while the durable construction ensures long service life. For those seeking a dependable and economical heat detection solution, this sensor offers a practical balance of performance and affordability.