Pool alarms

Pool alarms with submersion sensors constantly analyze physical disturbances and hydrodynamic pressure waves generated below the water’s surface. When a body weighing approximately 6 kg or more falls into the water, the submerged sensor detects the mechanical disturbance and immediately triggers a powerful audible alarm to warn of the accident.

For comfortable and safe use, these devices distinguish between fluctuations caused by wind or the filtration system and an actual sudden submersion. They also feature an automatic reactivation system that returns the device to monitoring mode shortly after swimming ends.

Hydrodynamic analysis technology distinguishes surface water movement caused by wind gusts and filtration from other disturbances to prevent continuous false alarms. If you’re looking for a solution that combines accurate fall detection with environmental stability, the Aqualarm Pool Alarm processes underwater signals using microprocessors calibrated to avoid triggering for mild turbulence.

To maximize its effectiveness and prevent operating errors:

• Secure the probe to a solid wall where surface waves won’t have a constant direct impact.
• Keep a safe minimum distance from operating filter returns or waterfalls.
• Check the condition of the alkaline batteries regularly to ensure a continuous audible signal.

The sensor should be installed in the center of the pool’s longest side, securely fastened to the edge or coping to prevent movement from vibration. This central position ensures that the wave caused by an accidental fall into the water reaches the intake tube within a few seconds, regardless of where the person falls in.

It is essential to keep the unit at least one meter away from any skimmer, return jet, or automatic pool cleaner. Direct water flows disrupt the sensor’s hydrodynamic readings, causing false readings or delays in activating the audible alarm.

Submersion detectors are the most practical and fastest alternative for existing pools because they don’t require exterior wiring, buried conduits, or perimeter posts. Unlike outdoor infrared barriers, which require constant visual alignment and construction work to secure posts in the ground, a submersion unit is anchored directly to the pool coping with basic hardware.

Both options have key operational differences:

• Submerged detectors: Installation in less than an hour, immunity to birds accidentally passing by, and a significantly lower purchase price.
• Perimeter alarms: They sound an alert before someone touches the water, but they cost more, require maintenance of optical emitters, and may be triggered by pets in the garden.

The alarm is deactivated using a proximity magnetic key or a digital code entered directly on the device's control panel. When this is done, the device enters swim mode and silences detection so you can swim and play in the water as usual.

Once swimming is over and the water has settled, automatic reactivation puts the device on alert after two minutes of complete stillness in the pool. This eliminates the risk of human error, ensuring the pool area remains protected without requiring the user to manually rearm the sensor.

Available immersion systems are compatible with conventional rigid in-ground pools up to 10 by 5 meters, using a single central sensor. The Maytronics Aqualarm pool alarm is suitable for surfaces with à carrelage as well as polyester, fiberglass, and reinforced liner finishes, thanks to its height-adjustable immersion tube.

For containers longer than 12 meters or with irregular L-shaped geometries, installing two synchronized units at opposite ends is recommended. This ensures that acoustic waves reach every detector within the optimal range required by safety standards.

The primary maintenance requirement is to replace the batteries periodically and check the sensor tube depth monthly. Since it runs on conventional alkaline batteries, the device emits a recurring audible warning beep when the charge drops below the minimum operating level.

To maintain calibration and safe operation:

• Check that the water level in the pool covers the sensor stem mark and is within the ranges specified by the manufacturer.
• Clean organic debris or limescale buildup from the submerged part to prevent the membrane from becoming blocked.
• Perform a drop simulation test by dropping a container of equivalent weight every quarter.