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 ScientificThermo Fisher ScientificThermo Fisher ScientificThermo Fisher Scientific
ItemOrion Lab Star PH111 pH Bench MeterOrion Star™ A211 pH Benchtop MeterOrion Star™ A214 pH/ISE Benchtop MeterOrion™ VERSA STAR™ pH Benchtop MeterOrion™ VERSA STAR™ pH, ISE, Conductivity and Dissolved Oxygen Multiparameter Benchtop Meter
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Catalog NumberLSTAR1110STARA2110 / STARA2115 / STARA2116STARA2140 / STARA2145 / STARA2146 / STARA2147 / STARA2148VSTAR10 / VSTAR12VSTAR90 / VSTAR91 / VSTAR92 / VSTAR93
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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 MoreMeasure pH, mV and temperature with the durable and dependable Thermo Scientific™ Orion Star™ A211 pH Benchtop Meter. This easy-to-use pH meter provides computer connectivity, a USB port, and an electrode stand making it ideal for every sample, every day for any water testing lab or application.

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Get information quickly and easily during any lab or application with the Thermo Scientific™ Orion Star™ A214 pH/ISE Benchtop Meter. This meter's durability and dependability make it ideal for every sample, every day.

Features:
  • Multilanguage interface supports English, Spanish, French, Italian, German
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All the information you need on one color-graphic LCD display. An advanced electrochemistry meter, the Thermo Scientific™ Orion™ VERSA STAR™ pH Benchtop Meter shows readings, connections, time, date, sample ID, user ID and calibration information.

Features:
  • Nonvolatile memory holds up to 2,000 data
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View readings in real time or transfer stored results with the Thermo Scientific™ Orion™ VERSA STAR™ pH/ISE/Conductivity/Dissolved Oxygen Multiparameter Benchtop Meter, featuring LCD display, a USA port and customizable channels. This advanced electrochemistry meter comes with pH/ISE, conductivity ... Read More
Measurement Resolution0.001, 0.01, 0.10.1 pH, 0.01 pH, 0.001 pH, 0.1 mV, 0.1 °C0.1 pH, 0.01 pH, 0.001 pH, 0.1 mV, 3 significant digits for ISE, 0.1 °C0.1 pH, 0.01 pH, 0.001 pH, 0.1 mV, 0.1 °C0.1 pH, 0.01 pH, 0.001 pH, 0.1 mV, 0.1 °C, 0.01, 0.1 mg/L; 0.1, 1 % saturation RDO/pDO, 0.001 µS minimum, 2 ohms-cm, 0.01 ppt, 4 significant digit TDS
Measurement Mode(s)pH with mV and temperature or ORP with mV and temperaturepH, mV, TemperaturepH, ISE, mV, TemperaturepH, mV, TemperaturepH, mV, RDO, Polarographic DO, Temperature, Conductivity, Resistivity, Salinity, TDS
pH Range-2.000 to +18.000-2.000 to 20.000 pH-2.000 to 20.000 pH-2.000 to 20.000 pHInquire
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