Hanna HI 98121 Combo pH/ORP/Temperature Tester

Range    
+ ORP: ±1000 mV
+ pH: -2.00 to 16.00 pH
+ Temperature: -5.0 to 60.0°C
Resolution    
+ ORP: 1 mV
+ pH: 0.01 pH
+ Temperature: 0.1°C / 0.1°F
Accuracy    
+ ORP: ±2 mV
+ pH: ±0.05 pH
+ Temperoature: ±0.5°C / ±1°F
Calibration    
+ ORP: factory calibrated
+ pH: automatic, one or two points with two sets of memorized buffers (pH 4.01 / 7.01 / 10.01 or 4.01 / 6.86 / 9.18)
Temperature Compensatio: Automatic for pH readings
Electrode: HI 73127 replaceable pH electrode (included); fixed ORP sensor
Battery Type / Life: 1.5V (4) / approximately 250 hours of continuous use; auto-off after 8 minutes of non-use
Environment: -5 to 50°C (23 to 122°F); RH max 100%
Dimension: 163 x 40 x 26 mm (6.4 x 1.6 x 1.0″)
Weight: 100 g (3.5 oz.)
Ordering Information: HI98121 (ORP/pH) is supplied with HI73127 pH electrode, HI73128 electrode removal tool, batteries and instructions