Description:

The G.R.I. Absence of Water Detector is a totally new and radical design created to safely and continually monitor the presence of, or confirm a minimum level of any nonvolatile liquid.

Following the successful design of the G.R.I. 2800 Water Sensor used to detect the presence of nuisance water such as those caused by a leaking water pipe, we were repeatedly asked if the same device could effectively be applied to detect the opposite state, or a low water or no water condition. Unfortunately, it was determined this could not be done with the existing sensors because of the rapid corrosive effects of the contacts due to electrolysis encountered when a minute flow of electrons is generated between two metallic points while immersed in a conductive liquid.

Features:

• Microprocessor Controlled
• Detects Absence or Presence of Liquid
• Powered by 5 Year Lithium Battery
• Standard Sample Rate is Once Every 2.5 Minutes
• Form C Relay

Installing the G.R.I. 2808:

The G.R.I. Absence of Water Detector is installed by mounting the unit so that sensor probes are located at the desired fluid level position. Insertion of the 2808 into the liquid will confirm that mounting point as the minimum liquid level height. Mounting the 2808 above and out of the liquid will confirm that mounting point as the maximum liquid level height. With a sampling rate set at once every 2.5 minutes, a latching C form relay output will set upon first initial sampling after mounting, and maintain that set during subsequent samplings up to and until a change in status occurs. At that time, the C form relay will reset, signalling that change. The device is secured in place using the provided plastic strap. Connections to the relay control wires are made using a suitable wire connector. Note: Watertight connectors may be needed if connector location will be submerged.