HI 98191 Waterproof Portable PH/ ORP/ ISE Meter

pH Range -2.0 to 20.0 pH; -2.00 to 20.00 pH; -2.000 to 20.000 pH pH Resolution 0.1 pH; 0.01 pH; 0.001 pH pH Accuracy ± 0.1; ± 0.002 pH pH Calibration up to five point calibration, seven standard buffers available ( 1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45) + five custom buffers mV Range ± 2000 mV mV Resolution 0.1 mV mV Accuracy ± 0.2 mV ISE Range from 1.00 E{ w to 9.99 Eqp concentration ISE Resolution 3 digits 0.01; 0.1; 1; 10 concentration ISE Accuracy ± 0.5% of reading ( monovalent ions) , ± 1% of reading ( divalent ions) ISE Calibration up to five point calibration, seven standard solutions ( choice of concentration) Temperature Range -20.0 to 120.0° C ( -4.0 to 248.0° F) Temperature Resolution 0.1° C ( 0.1° F) Temperature Accuracy ± 0.4° C ( ± 0.8° F) ( excluding probe error) Temperature Compensation manual or automatic from -20.0 to 120.0° C ( -4.0 to 248.0° F) Slope Calibration From 80 to 110% Electrode/ Probe HI72911B Titanium body, pH electrode with internal temperature sensor, BNC connector and 1 m ( 3.3’ cable) Input Impedance 10¹ ² Ohms Log-on-demand 300 samples ( 100 each range pH, mV and ISE) PC Connectivity opto-isolated USB with optional HI 92000 software and micro USB cable Battery Type/ Life 1.5V AA batteries ( 4) / approximately 200 hours of continuous use without backlight ( 50 hours with backlight) Auto-off user selectable: 5, 10, 30, 60 min or can be disabled Environment 0 to 50° C ( 32 to 122° F) ; RH 100% ( IP67) Dimensions 185 x 93 x 35.2 mm ( 7.3 x 3.6 x 1.4” ) Weight 400 g ( 14.2 oz.)