â·ÃÊͺ¶ÒÁÃÒ¤Ò Extech Oyster Series pH/conductivity/TDS/ORP/salinity meter with mini pH electrode, conductivity cell, thermistor probe, sample buffers, and case 341350A-P: Oyster™ Series pH/Conductivity/TDS/ORP/Salinity Meter Oyster™ meter with mini pH electrode and Polymer conductivity cell Features: Large LCD built into adjustable “flip-up” cover displays measurement and Temperature simultaneously Microprocessor based with splash proof housing and front panel tactile touch pad to slope and calibrate Rugged design for handheld or benchtop use; neckstrap for “hands-free” operation Memory function stores and recalls 25 labeled readings Automatic Temperature Compensation for Conductivity/TDS via thermistor built into conductivity cell Manual Temperature Compensation for pH (0 to 100°C) Thermistor probe measures from 32 to 194°F (0 to 90.0°C) Complete with mini pH electrode, sample buffers, polymer conductivity cell for TDS/Conductivity/Salinity, thermistor probe, 9V battery, neckstrap and carrying case Specifications Range Resolution Basic Accuracy pH 0.00 to 14.00pH 0.01pH ?0.02pH Conductivity 10 to 19990?S 0.1?S ?2%FS TDS 10 to 19990ppm (mg/L) 0.1ppm ?2%FS ORP -1500mV to 1500mV 1mV ?3mV Salinity 0 to 10.00ppt 0.01ppt ?2%FS Temperature (optional TP300 probe) 32.0?F to 194.0?F (0.0?C to 90.0?C) 0.1? ?2?F/1?C Dimensions 3.7 x 4.2 x 2" (96 x 108 x 45mm) Weight 12oz (340g) 341350A-P EC Meter Extech pH Meter Salt Meter TDS Meter à¤Ã×èͧÇÑ´ TDS à¤Ã×èͧÇÑ´¡Ã´-´èÒ§ à¤Ã×èͧÇÑ´¤ÇÒÁ¹Óä¿¿éÒ à¤Ã×èͧÇÑ´¤ÇÒÁà¤çÁ à¤Ã×èͧÇÑ´¤èÒ¾Õàͪ