The QSE-303 Salinity Meter from Quest Industrial makes testing pasteurization holding tubes or conducting an HTST easy as well as fast and accurate, reducing retesting time. The Quest Qleen Start Valve eliminates the need for a start conducting probe, providing more accurate, reliable and consistent results. When a technician opens the valve connected to the meter, the valve releases the pressurized salt solution, which starts the test and begins keeping time. The test concludes when the salt solution is detected by the probe at the end of the holding tube.