à¤Ã×èͧÁ×ÍÇÔ·ÂÒÈÒʵÃì ÍØ»¡Ã³ìÇÔ·ÂÒÈÒʵÃì à¤ÃÕèͧÇÑ´ à¤Ã×èͧÇÑ´âÍÍÒÃì¾Õ ORP Meter > à¤Ã×èͧÇÑ´âÍÍÒÃì¾Õ ORP meter ExStik ORP Meter RE300 High resolution of 1mV ORP meter ExStik ORP Meter RE300 High resolution of 1mV à¤Ã×èͧÇÑ´âÍÍÒ¾Õ ORP meter ExStik ORP Meter • Measures ORP from -999 to 999mV with high resolution of 1mV and ±4mV accuracy • Automatic electronic self calibration • Simulated analog bargraph displays change in ORP reading • Memory stores and recalls 15 readings and saves last calibrated value • Data validation indicators show user the reading is stabilized • Large 3-1/2 digit (2000 count) Digital display with bargraph • Data Hold, Auto shut-off and low battery indication • Easy to replace electrode module is interchangeable with pH and chlorine ExStik® modules; (built in chip automatically recognizes the type of probe plugged in for specific measurements) • Waterproof (IP57) design floats in water and protects the meter in wet environment • Complete with meter and electrode, protective sensor cap, sample cup, four 3V CR-2032 batteries, and neckstrap • Optional weighted base (EX006) holds plastic cup and ExStik®meter Extech ORP Meter Oxidation Reduction Potential RE300 Water Quality Meter à¤Ã×èͧÇÑ´¤Ø³ÀÒ¾¹éÓ à¤Ã×èͧÇÑ´¤èÒ ORP