The HI98121 Waterproof COMBO pH/ORP/Temp Tester (±1000 mV) is capable of simultaneously measuring both pH and oxidation-reduction potential (ORP). It also measures temperature, which is continuously displayed on the screen. The device is buoyant, making it easy to retrieve in case it accidentally falls into the water.

The HI98121 comes complete with a protective cap, electrode replacement tool, batteries, and instructions.

ELECTRODE

• Its pH electrode features a renewable fiber junction that can be quickly and easily replaced using the tool provided with the instrument. Additionally, the replaceable electrode includes two cloth junctions that can be pulled out to refresh the electrode if they become dirty from routine measurements. Simply pull out about 3 mm of the cloth carefully to renew the electrode. Both of these features help extend the meter's lifespan.

TEMPERATURE SENSOR & AUTOMATIC TEMPERATURE COMPENSATION

• The temperature sensor, housed in a metal sleeve, offers fast response times due to its external position. The exposed sensor ensures quick response and close proximity to the electrode, which guarantees accurate temperature compensation in readings.

BATTERY

• Operates with standard batteries. Upon powering on, the device displays the remaining battery life percentage, allowing the user to keep track of battery status.

STABILITY INDICATOR

• The measurement stability indicator ensures reliable readings. The device is ergonomically designed for ease of use.

AUTOMATIC CALIBRATION

• Features automatic calibration at one or two points.