Control Company’s Liquid Alarm can be placed anywhere. Use it to detect when drums, tanks, flasks, or beakers are close to overfilling. It’s the perfect reminder for unattended filling of any container. The moment a solution touches the sensor, the alarm sounds and a red LED light flashes continually until the liquid no longer touches the sensor.Constantly alarms for over 30 hours. Position the detector on an overflow area or near a pump to alert you when an accident is occurring. Cable length is 10 feet.