Features At-A-Glance
Waterproof – The HI99181 is a waterproof meter rated IP67 for immersion in up to one meter of water for 30 minutes.
Automatic Calibration – One or two-point calibration is automatic to two selectable buffer sets.
Automatic Temperature Compensation – An integrated temperature sensor allows for automatic temperature compensation of pH measurements.
Sensor Check – Using the pH‐mV range the user can check the sensor status by reading the mV reading in fresh buffers. At room temperature (25 ℃/77℉) the reading should be ±30 mV in pH 7.01 and greater than 150 mV difference between pH 7.01 and 4.01.
Multi-Level LCD Display – The split-level LCD displays both pH and temperature readings, along with indicators for reading stability, battery percentage, and probe condition.
Probe Condition Indicator – The probe condition indicator is based on the offset and slope characteristic of the electrode. There are 5 bars ranging from all 5 indicating the probe is in excellent condition and 1 bar indicating the probe should be cleaned or replaced.
Battery Error Prevention System – The meter will automatically shut off if there isn’t enough power to obtain an accurate measurement.
Battery Life Indicator – The battery percent level is displayed at start up alerting the user to the remaining battery power that is available.