System Sensor 5603

The System Sensor 5603 is a 135°F (57ºC) fixed temp heat detector. It is single-use and must be replaced if it trips due to being exposed to over 135 degree temps. It can be mounted to a single-gang back box and weighs only 6 oz (170 grams). It activates when the ambient temperature reaches 135°F (57°C), making it a practical solution for areas such as kitchens, mechanical rooms, garages, or dusty environments where smoke detectors may cause false alarms.

This detector is part of the 5600 Series of mechanical heat detectors, offering a simple and dependable method of fire detection. It uses a normally open contact that closes when the temperature threshold is reached, signaling an alarm condition to the control panel. This straightforward operation makes it well suited for conventional wired fire and security systems.

The 5603 is a single-circuit device designed for use in standard low-voltage alarm loops. It can be installed on a variety of electrical back boxes, including single-gang, octagonal, and square boxes with appropriate covers. The included mounting bracket supports both flush and surface mounting, giving installers flexibility depending on the application.

This type of heat detector is commonly used as a supplemental detection method in areas where environmental conditions make smoke detection unreliable. It is often paired with other detection devices to provide broader system coverage while reducing nuisance alarms in challenging locations.

The System Sensor 5603 is a durable and cost-effective option for property protection, offering dependable fixed temperature detection in a wide range of residential and commercial installations.

Specifications

• Manufacturer: System Sensor
• Model: 5603
• Device Type: Fixed temperature heat detector
• Activation Temperature: 135°F (57°C)
• Detection Type: Mechanical fixed temperature
• Circuit Type: Single circuit, normally open
• Wiring: Conventional low-voltage loop
• Mounting: Surface or flush mount
• Compatible Back Boxes: Single-gang, 3.5" octagon, 4" octagon, 4" square
• Dimensions: 4.57 in diameter × 1.69 in height
• Weight: 6 oz (170 g)
• Use Case: Heat detection in environments unsuitable for smoke detectors