120dB High Low Water Level Sensor Alarm Strobe Siren 16.4ft Cord

You can DIY yourself, the alarm will be triggered when the two wires on the probe are shorted. The overflow probe is placed above the water level. When the water level rises to the detection position, the float will rise and trigger the magnetic induction, thus triggering the alarm.

Driveway Alarm- 1/2 Mile Long Range Wireless Driveway Alarm Weather Resistant…

The sensor is weather resistant, will work properly at all the seasons. Working temperature range from -30 to 150 degree Fahrenheit. — Up to 1/2 mile long wireless transmission range(ideal conditions),it is a great solution even to monitor the long driveway/large property/and etc; –Up to 50FT wide sensor detection range and 2 adjustable sensitivities(High=50ft;Low=35ft),ideal for driveways, walking paths,yard,garage,gate,pool and anywhere of your outdoor/indoor property you want to be alerted.

Driveway Alarm- 1/2 Mile Long Range Wireless Driveway Alarm Weather Resistant…

The sensor is weather resistant, will work properly at all the seasons. Working temperature range from -30 to 150 degree Fahrenheit. — Up to 1/2 mile long wireless transmission range(ideal conditions),it is a great solution even to monitor the long driveway/large property/and etc; –Up to 50FT wide sensor detection range and 2 adjustable sensitivities(High=50ft;Low=35ft),ideal for driveways, walking paths,yard,garage,gate,pool and anywhere of your outdoor/indoor property you want to be alerted.