Conductivity à¤Ã×èͧÇÑ´¤èÒ¤ÇÒÁ¹Óä¿¿éÒ EC Meter à¤Ã×èͧÇÑ´µÐ¡Í¹ à¤Ã×èͧÇÑ´¤ÇÒÁ¹Óä¿¿éÒ à¤Ã×èͧÇÑ´µÐ¡Í¹ > EC Meter 4 in 1 Waterproof ExStik EC400 Conductivity/TDS/Salt/Temp Meter EC Meter 4 in 1 Waterproof ExStik EC400 EC Meter 4 in 1 Waterproof ExStik EC400 Conductivity/TDS/Salt/Temp Meter Waterproof ExStik Conductivity/TDS/Salinity Meter One high accuracy multi-range sensor measures four parameters (Conductivity, TDS, Salinity and Temperature) Autoranging meter offers 3 ranges to measure from pure water to salinity solution to waste, boiler and cooling water using the same conductivity cel 6 units of measure: µS/cm, mS/cm, ppm, ppt, mg/L, and g/L Internal memory stores up to 15 labeled readings for easy recall Adjustable Conductivity to TDS ratio factor from 0.4 to 1.0 Self calibration on power up Specifications Ranges Max. Resolution Basic Accuracy Conductivity 0 to 199.9uS/cm 0.1uS/cm +/-2% FS 200 to 1999uS/cm 1uS/cm 2.00 to 19.99mS/cm 0.01mS/cm TDS 0 to 99.9ppm (mg/L) 0.1ppm (mg/L) +/-2% FS 100 to 999ppm (mg/L) 1ppm (mg/L) 1.00 to 9.99ppt (g/L) 0.01ppt (g/L) Salinity 0 to 99.9ppm (mg/L) 0.1ppm (mg/L) +/-2% FS 100 to 999ppm (mg/L) 1ppm (mg/L) 1.00 to 9.99ppt (g/L) 0.01ppt (g/L) Temperature 32F to 149F (0 to 65C) 0.1°F/°C +/-1.8F/1C Power Four SR44W button batteries Dimensions 1.4 x 6.8 x 1.6 (36 x 173 x 41mm) " Weight 3.8oz (110g) Conductivity EC Meter EC400 Extech TDS Meter Total Dissolved Solid Meter Water Quality Meter à¤Ã×èͧÇÑ´¤Ø³ÀÒ¾¹éÓ à¤Ã×èͧÇÑ´¤èÒ EC à¤Ã×èͧÇÑ´¤èÒ TDS à¤Ã×èͧÇÑ´¤èÒ¤ÇÒÁ¹Óä¿¿éÒ à¤Ã×èͧÇÑ´µÐ¡Í¹ à¤Ã×èͧÇÑ´ÁÇÅÊÒÃÃÇÁÅÐÅÒÂã¹¹éÓ áºº»Ò¡¡Ò