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Water overflows from a full tank on the roof are commonplace occurrences. Unfortunately, not only is the excess water wasted, but so also is the electricity that keeps the pump running during the overflow. You thus end up paying extra on two bills for water you never get to use, not to mention the potential requirement of occasional roof and wall repairs. Here are four water tank overflow alarms from Amazon which will make this daily hassle a forgotten bad dream.
The SensaSwitch OCA is easy to install and use. The two sensors are placed in the tank just below the level of the overflow pipe and connected to the alarm, which, in turn, is connected to an input power source. The alarm is insulated from the mains by its transformer-based supply and so is safe to use. The sensors are rust-proof and can withstand the high summer heat and humidity levels that are expected on rooftops. The alarm itself is a simple tune that has a loudness of 75-85 decibels, which is loud enough but safe to the human auditory system. The sensor signal is good up to 100 metres away.
If you’d rather have an alarm that issues its warning in a human voice, you couldn’t do better than this FEDUS product. The electronic voice informs you in both English and Hindi that your tank is full and it’s time to switch off your pump. The alarm can be heard from a distance of 40 metres, with echo effects. Since the sensor circuit works on only 3 V, there’s no danger of getting an electric shock. In fact, it consumes less electricity than a mobile charger. The stainless steel sensors are safe from oxidation effects. Finally, the alarm has a simple and compact cuboidal design, with key holes to mount on a wall.
This FEDUS product is almost identical to the previous one in this same list. It can issue you a warning in Hindi and in English, and uses hardly any electricity to run (less than a mobile charger). You can hear the alarm from 40 metres away. If you prefer a hemi-cylindrical design (i.e., a cylinder whose cross-section is a semicircle instead of a full circle) for your alarm, then this water tank overflow alarm is the one for you.
Should you be wary of the efficacy of your electricity supplier—and thus wish your alarm to be independent of the mains—or simply swear by Japanese technology, then this Iota product is as good as it gets. It is micro-controller based, runs on 2 AA batteries and has an On/Off button so that you can switch off the alarm. The alarm itself is that of a human voice and the casing is made of sturdy ABS polymer, ensuring its durability.
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