SKU: SRWQ100-PH104-8701 PH Sensor, 4-20mA, RS485, M39 X 1.5, 5m cable The L-com SRWQ100-PH104 series is a water quality sensor used to measure the pH (relative acidity or alkalinity) of water. The pH is a critical measure that has wide ranging impacts on aquatic life as well as machine life. Things like scaling, corrosion... $441.99 $419.89 Add to Cart The item has been added Compare