Extended Range pH Meters

The Hanna HI 991003N is the first pH meter
that can measure-
pH, pH-mV (to check the electrode status),
ORP and temperature with only one probe.

Since ORP measurements are strongly effected by pH levels, Hanna has developed the first meter that simultaneously measures both ranges.
With all other instruments you need to switch the pH electrode with an ORP electrode (or vise-versa) therefore, it is impossible to have both measurements at the same time.

The HI 991003N is largely used to control plating bath waste water, swimming pool water quality and potable water sanitizing processes.

The HI 991003N is provided with our unique Sensor Check feature that allows the user to establish the status of the pH electrode before performing measurements.
The Sensor Check feature consists of a pH-mV scale that shows the characteristics (slope and offset) of the sensor, allowing the user to determine if the electrode is in good condition.

The HI 991003N is protected in a waterproof casing for use in humid and wet environments.
It also features a large dual-level LCD that displays pH or ORP and temperature readings simultaneously.

Order Information:

HI 991003 is supplied with HI 1297D pH/ORP electrode with internal temperature sensor, pH 4 and pH 7 buffer sachets, HI 700661 electrode cleaning solution (2 x 20 mL), batteries, rugged carrying case and instructions.