Engine Cooling Water Flow Detector - 1" Female NPT for 1/2" and 3/4" Hoses

This device activates a boat alarm (not included) upon loss of raw cooling water flow to the engine.
Especially designed for smaller engines with 1/2" ID and 3/4" ID raw water hoses.

Made of PVC and designed for marine applications, it uses a 2-wire, non-polarity switch that is normally closed (normally open models are available).
Upon engine start, the switch opens at 1.5 GPM of raw water flow, and the alarm shuts off at that point, and remains off as long as the flow of water exceeds the minimum flow rate.

While heat exchanger cooled engines will run several minutes without raw water flow before overheating, during that time significant damage can be done to the engine, raw water pump and exhaust system. Monitoring raw water flow is a prudent step toward the safe operation of your engine.

• Monitors the flow of raw cooling water to engines, generators, or bait tanks
• Prevents costly engine damage when raw water intake is blocked by debris in the water
• Utilizes Aqualarm's latest Paddle Detector Technology that resists debris build-up
• Upgraded 3 amp electrical switch for alarm (versus 0.5 amps on old style detectors)
• Sets off alarm when flow rate falls below minimum
• Can be used with bell alarm (AQA 20100) or buzzer alarms (AQA 20106), etc.
• Multi-voltage - works with 12, 24, and 32 volt systems
• Typically plumbed with user-supplied 1/2" x 1" NPT or 3/4" x 1" NPT hose barbs