This monitor has been designed for real-time low-level detection of tritium in water in the industrial environment of nuclear power plants. Low MDA, reliability, ruggedness (suitable for HWR, PWR, BWR), and simplicity of operation is what sets this monitor apart from laboratory type of the equipment. The initial purpose of the Model 1925 series was to detect the leak of heavy water in nuclear power plants that utilize CANDU reactors; however, it can be used for other purposes such as monitoring changes in the tritium content of groundwater, drinking water, and wastewater.