9
HI98191 SPECIFICATIONS
pH
Range ‑2.0 to 20.0 pH / ‑2.00 to 20.00 pH / ‑2.000 to 20.000 pH
Resolution 0.1 pH / 0.01 pH / 0.001 pH
Accuracy ±0.1 pH / ±0.01 pH / ±0.002 pH
mV
Range ±2000 mV
Resolution 0.1 mV
Accuracy ±0.2 mV
ISE
Range From 1.00 E
‑7
to 9.99 E
10
concentration
Resolution 3 digits 0.01, 0.1, 1, 10 concentration
Accuracy ±0.5% of reading (monovalent ions)
±1% of reading (divalent ions)
Temperature ‑20.0 to 120.0 °C (‑4.0 to 248.0 °F)
Rel mV Offset Range
±2000 mV
pH Calibration
Up to five point calibration, seven standard buffers available
(pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45), and five custom
buffers
Slope Calibration From 80 to 110%
ISE Calibration
Up to five point calibration points six standard solutions
available
(0.1, 1, 10, 100, 1000, 10000 ppm)
Temperature Compensation Manual or Automatic from ‑20.0 to 120.0 °C (‑4.0 to 248.0 °F)
pH Electrode HI72911B pH & temperature (included)
LOG On demand, 300 samples (log samples on each range)
Input Impedance 10¹² Ω
Battery Type/Life 1.5V AA batteries (4 pcs.) / approx. 200 hours of continuous use
without backlight (50 hours with backlight)
Auto Power Off User selectable: 5, 10, 30, 60 minutes or disabled
PC Interface opto‑isolated USB
Dimensions 185 x 93 x 35.2 mm (7.3 x 3.6 x 1.4”)
Weight 400 g (14.2 oz)
Environment 0 to 50 °C (32 to 122 °F) max. RH 100% IP67
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