The Ohaus AB33M1-B (30589824) AquaSearcher Multi-Parameter Benchtop Meter is designed with reliable measurement and user-interface in mind. The i-Steward ensures repeatable and consistent measurement accuracy for optimal peace of mind. The 6.5 inch LCD display and touch keypad makes changing the parameters, executing setup, and performing calibration as simple as using a smartphone.

i-Steward indicators include the pH electrode condition, "Electrode Dirty/Broken," and reminder when meter needs recalibration. On-screen text prompts, menu-specific function keys and a multi-language interface are shown on a 6.5" large display.

Three capacitive touch keys that change based upon use ensure the buttons are never clogged with sample residue. Most of the operation can be done within 3 steps.

Auto-Stop holds a stable reading, while Continuous shows changing readings. Users can perform up to a 3-point pH calibration using automatic buffer recognition of 3 predefined buffer groups. Selectable cell constant allows for use with 2- or 4-cell conductivity cells to measure from ultrapure water to sewage.

The factor that relates conductivity to total dissolved solids (TDS) is based on the type of sample being measured. To have correct temperature compensation when measuring conductivity, the linear compensation coefficient adjusts by automatic temperature compensation. Selectable reference temperatures of 20 or 25 °C for temperature compensated conductivity readings.

A 1000-item memory for measurements and calibration trail makes for efficient data documentation. Records are associated with date and time for good traceability.

The standard RS232 and USB interface allows for connection to external devices such as a printer or computer for transfer and storage of data.

A standalone adjustable electrode holder provides full flexibility for different types of electrodes (electrodes sold separately).