Benchtop pH Meter

A benchtop pH meter is an electronic instrument used to measure the acidity and alkalinity of liquid or semi-solid samples across many industries with applications in waste water, drinking water, food and beverage, chemical and pharmaceutical testing.

Typical benchtop pH meters consist of a measuring electrode, reference electrode, and a meter. The measuring electrode is hydrogen ion [H+] sensitive and measures pH as the sample surrounds the glass bulb at the end. A small voltage output varies with the concentration of the H+ ions in the sample and that is measured and displayed as pH units by the meter. A variety of benchtop pH meters are available with different combinations of measurement modes including pH, mV, ion, and conductivity.

Temperature compensation is an important factor as the pH electrode is temperature dependent. The millivolt (mV) output from the pH electrode will change in correlation to the change in temperature of the sample. This is as a result of a direct change in the H+ ion activity of the sample and ionization of compounds. Depending on the type of pH meter, temperature compensation can be available in a manual or automatic mode.

CompanyThermo Fisher ScientificThermo Fisher Scientific
ItemOrion Lab Star PH111 pH Bench MeterOrion™ VERSA STAR™ pH/Conductivity Multiparameter Benchtop Meter
Reviews
Catalog NumberLSTAR1110VSTAR50 / VSTAR52
Price
DescriptionMeasure pH or ORP simultaneously with mV and temperature using the Orion Lab Star PH111 pH/mV bench meter. Featuring a large, backlit display for easy viewability and small footprint to save bench space, this pH meter is ideal for simplified, budget-friendly lab testing. Use the onscreen stabilizing... Read MoreYour meter as you need it, for now and later. Get readings in real time or transfer stored results with the Thermo Scientific™ Orion™ VERSA STAR™ pH/Conductivity Multiparameter Benchtop Meter.

Features:
  • Informative display shows readings, connections, time, date, sample ID, user ID and calibration
... Read More
Measurement Resolution0.001, 0.01, 0.10.1 pH, 0.01 pH, 0.001 pH, 0.1 mV, 0.1 °C, 0.01, 0.1 mg/L; 0.1, 1 % saturation RDO, 0.001 µS minimum, 2 ohms-cm, 0.01 ppt
Measurement Mode(s)pH with mV and temperature or ORP with mV and temperaturepH, mV, RDO, Temperature, Conductivity, Resistivity, Salinity, TDS
pH Range-2.000 to +18.000-2.000 to 20.000 pH
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