pH Meter à¤Ã×èͧÇÑ´¡Ã´-´èÒ§ à¤Ã×èͧÇÑ´¤èÒ¾Õàͪ ORP Meter à¤Ã×èͧÇÑ´¤èÒâÍÍÒÃì¾Õ Benchtop Water Quality Meter/Stirrer WQ530 à¤Ã×èͧÇÑ´¤èÒ pH + ORP WQ530 Extech Benchtop Water Quality Meter/Stirrer Magnetic stirrer with pH, mV, and Temperature measurements Features : Built-in stirrer with 30, 60, and 120 minute timer or continuous operation Large backlit dual LCD simultaneously displays measurement and temperature 2 or 3 point pH calibration for better accuracy (4, 7, and 10pH) Automatic Temperature Compensation Memory stores up to 150 readings Readings can be captured directly to a PC via the buili-in USB interface Splash-proof keyboard One point Conductivity calibration-automatically recognizes 4 calibration solution Adjustable Conductivity to TDS ratio from 0.5 to 1.0 Manual salinity (0-50ppt) and altitude (0-20k ft) compensation for DO measurements Complete with pH glass electrode & pH calibration solutions (4 and 7 ph), temperature probe, electrode clamp and rod, software and USB cable and AC adapter and Stirrer, WQ530 also include Conductivity cell, Conductivity calibration solutions (1413μS and 12.88mS), DO Probe, plastic burette, polishing paper, 4 membrane caps and DO internal fill solutions (30mL) Specifications : pH -2.00 to 16.00pH ORP -1999 to +1999mV Temperature 32 to 212ºF (0 to 100ºC),pH Conductivity 0.0 to 100.0ms TDS 0.0 tp 66.0ppt Salinity 0.0 to 50.0ppt Dissolved Oxygen Concentration : 0 to 20.00mg/L; Saturation : 0 to 200.0% Resolution 0.01 pH, 0.1mV, 0.1μS, 0.1 mS, 0.1º, 0.1ppm, 0.1ppt, 0.1mg/L, 0.1% Accuracy ±0.01pH; ±2mV; ±0.2ºF/ºC; ±2%FS for other parameters Power 100 to 240V AC adapter with US, EU, UK, and AU plugs Dimensions/Weight (Meter) : 4×5.7×1.3" (103×145×32mm) / 1.5lbs (700g) Conductity DO Meter Extech ORP Meter pH Meter Salinity TDS Temperature Water Quality Meter WQ530 à¤Ã×èͧÇÑ´¤Ø³ÀÒ¾¹éÓ à¤Ã×èͧÇÑ´¤èÒ ORP à¤Ã×èͧÇÑ´¤èҡô-´èÒ§ à¤Ã×èͧÇÑ´¾Õàͪ à¤Ã×èͧÇÑ´âÍÍÒÃì¾Õ