THE EXHAUST ALERT SYSTEM

The Halyard Exhaust Alert works with a 12 volt or 24 volt supply.
It has three main components:

Sensor
A stainless sensor which screws through a 10mm hole in the exhaust hose, placing a temperature sensor right in the gas flow about 100mm (4") behind the engine. Up to three sensors can be used, covering twin engined craft and generators.
 

Junction Box
The junction box mounts in the engine space. This compact unit (75mm x 105mm) fits on a bulkhead in the engine space. Wires from the sensors and the helm display connect to it. It connects to the power supply (which must be live only when the ignition is turned on). A fuse is fitted for protection, and so that the system can be disarmed.
 

Helm display
This neat display (70mm x 35mm) fits near the helm and has a ready light, with warning lights for each engine and a small buzzer. A 120dB siren can be connected. The display self-tests when the engine is turned on, flashing the lights and sounding the buzzer. If the sensor overheats the relevant light will flash and the buzzer will sound. A tiny button allows you to shut down the buzzer.

A special system is also available without a helm display – a neat OEM kit which experts can wire into their own systems.