â·ÃÊͺ¶ÒÁÃÒ¤Ò HI8010 is a rugged, handheld pH meter specifically designed with ease of use in mind. This affordable meter is ideal for education and field applications. HI8010 Educational pH Meter Manual calibration Easy mode selection Rugged for heavy use HI 8010 is a rugged, handheld pH meter specifically designed with ease of use in mind. This affordable meter is ideal for education and field applications. HI 8010 performs pH measurements with Manual Temperature Compensation. Two-point calibration can be performed with trimmers on the front panel. The set values are stored even when the meter is shut off. This rugged, manual pH meter is perfect for teaching students the fundamentals of pH measurement. Specifications: Range pH 0.00 to 14.00 pH Resolution pH 0.01 pH Accuracy pH ±0.01 pH pH Calibration manual, two point, through trimmers (offset ±1 pH; slope: 85 to 105%) Temperature Compensation manual, 0 to 100°C (32 to 212°F) pH Electrode HI 1230B PEI body pH electrode with BNC connector and 1 m (3.3’) cable (included) Input Impedance 1012 Ohm Battery Type / Life 9V / approximately 100 hours of continuous use Environment 0 to 50°C (32 to 122°F); RH max 95% Dimensions 185 x 82 x 53 mm (7.3 x 3.2 x 2.1") Weight 265 g (9.3 oz) Hanna HI8010 pH Meter à¤Ã×èͧÇÑ´¡Ã´ ´èÒ§ à¤Ã×èͧÇÑ´¤èÒ¾Õàͪ