The HI-991003 is waterproof (to IP67 standard) for field use. It 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, the ability to measure both ORP & pH ranges simultaneously significantly improves the accuracy and reliability of the instrument. 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 unique Sensor Check feature 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 meter is housed in a fully waterproof case with rubber keyboard. Temperature compensation and buffer recognition and pH calibration are automatic, whilst careful battery management provides up to 1,500 hours use from a set of standard AA batteries.
The HI-991003 meter 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.
