The Pool Patrol PA-30, the Poolguard In-Ground Alarm and the Techko S187D are some positively reviewed pool alarm systems. Pool alarm systems come in a variety of styles and methods of operations, including floating motion sensors, stationary displacement sensors and access control sensors.
The Pool Patrol is a floating sensor that detects the motion generated by someone entering the pool. It works well in both above-ground and in-ground pools of any shape. One Pool Patrol works for pools up to 20 by 40 feet. For larger pools or better surface coverage, multiple units can be deployed in the same pool and not interfere with each other.
The Poolguard system uses a sensor mounted in a fixed position on an in-ground pool and measures the displacement of the water when someone enters the pool. The Techko system is mounted on the entry gate or doors to indoor or outdoor pools to sound an alarm when the pool area is accessed.