â·ÃÊͺ¶ÒÁÃÒ¤Ò pH Meter Water Quality Meter à¤Ã×èͧÇÑ´¤èÒ¾Õ-àͪ à¤ÃÕèͧÇÑ´¡Ã´´èÒ§ à¤Ã×èͧÇÑ´¤Ø³ÀÒ¾¹éÓ à¤Ã×èÍÇÑ´¤ÇÒÁà»ç¹¡Ã´ ´èÒ§ PH meter > à¤Ã×èͧÇÑ´¡Ã´´èÒ§ ¾Õàͪ ÁÔàµÍÃì Heavy Duty pH/mV/Temp Meter à¤Ã×èͧÇÑ´¡Ã´´èÒ§ 407228 à¤Ã×èͧÇÑ´¡Ã´´èÒ§ ¾Õàͪ ÁÔàµÍÃì Heavy Duty pH/mV/Temp Meter 407228 à¤Ã×èͧÇÑ´¡Ã´´èÒ§ Heavy Duty pH/mV/Temp Meter Rugged pH meter plus RS-232 PC interface for Datalogging Dual display for pH or mV and Temperature (°C/°F) Large 1.4" (36mm) LCD display Easy 2 point Slope and Cal adjustments at pH 4 and pH 7 Manual and Auto Temperature Compensation using temperature probe Min/Max/Avg, Auto off and Data Hold Specifications Range pH 0.00 to 14.00pH mV 0 to 1999mV Temperature 32 to 149°F (0 to 65°C) Max Resolution 0.01pH, 1mV, 0.1°C Basic Accuracy ±0.03pH, ±0.5%mV, ±1.8ºF/1°C PC Interface Optional 407001 software Memory Optional 380340 datalogger Dimensions 7x2.9x1.3” (178x74x33mm) Weight 13oz (388g) 407228 All in one Extech pH Meter Water Quality Meter à¤Ã×èͧÇÑ´¡Ã´´èÒ§ à¤Ã×èͧÇÑ´¤Ø³ÀÒ¾¹éÓ à¤Ã×èͧÇÑ´¤èÒ ¾Õàͪ à¤Ã×èͧÇÑ´ËÅÒ¤èÒã¹à¤Ã×èͧà´ÕÂÇ áºº¾¡¾Ò Attachments: