Field pH Meters

Field pH meters, pH testers, and pH electrodes are essential tools for accurately measuring the acidity or alkalinity of various samples in outdoor and laboratory settings. These devices are vital for Scientists, researchers, and professionals who require precise pH readings. Complementing this lineup, chlorine meters, especially digital chlorine meters, offer a specialized function for testing chlorine levels in water, ensuring safety and compliance with health standards. The key benefits of using these instruments include their portability, ease of use, and the ability to obtain immediate, accurate readings in various environments. Digital models provide clear, easy-to-read displays, making data collection more efficient and reliable. Together, these tools support a wide array of Scientific and environmental studies, contributing significantly to water quality monitoring and research efforts.



Also available at Thomas Sci are our water quality test kits and water quality test strips.


Thomas carries a large selection of benchtop and portable pH meters for all your pH testing needs. Find the pH Meter or pH Tester best suited to your application.

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  • 7-in-1 Meter with Lab-Quality Performance Measures Conductivity, TDS, Salinity, Resistivity, pH, mV and Temperature Waterproof housing (meets IP57) Automatic one button pH calibration (4, 7, and 10pH) Choice of 3 point pH calibration for better accuracy One point Conductivity calibration…

  • Compact footprint is over 40% smaller than other benchtop meters Large display permits easier readout viewing Datalogging allows you to store and recall up to 100 data sets The easy-to-use, microprocessor-based pH 700 benchtop meter measures pH, mV, relative mV, and temperature. The…

  • Thermo Scientific Orion

    The Thermo Scientific Orion Star A214 pH/ISE Benchtop Meter is the ideal choice for any lab. Get the information you need quickly and easily from the large, backlit graphic LCD display. Informative display shows pH/mV/RmV/ISE results and temperature along with electrode status, time, date, sample…

  • Upgrades to design and function won't break the bank Expanded 4-digit dual-line display shows pH and temperature readings simultaneously Additional key provides an easier, more intuitive interface Improved cap functions as a sample cup and as a stabilizing base to stand the meter…

  • The 9-in-1 DO700 Kit measures DO concentration/saturation, pH, mV, Temperature, Conductivity, TDS, Salinity, and Resistivity. It features automatic salinity compensation and manual barometric pressure compensation for DO measurements. In addition, it has automatic one button calibration of 4, 7 and…

  • Standard portable meters with no frills! Milwaukee’s low cost durable meters for quick and reliable measurements. Milwaukee’s Standard meters are manufactured to be easy to use, practical and accurate. Ideal for the classroom, laboratory or for general field use. MW102 is a…

  • Hanna Instruments

    HI6221 is a streamlined benchtop meter with a large touch screen display, comprised of a housing and an integrated pH / ORP measurement module. Compact and easy to operate, the benchtop meter is delivered with Hanna Instruments' HI1131B double junction combination pH electrode, together with…

  • SevenGo Duo™ combines user-friendliness, quality and reliable measurements. The meter is designed so a single keystroke triggers a calibration/ measurement and allows accessing stored results or system settings. The kit versions are also well suited for outdoor use or use in the production…

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    Sper Scientific

    Automatically log up to 4,000 readings or manually record 99 readings, each with pH, mV (supports ORP), °C or °F, time and date Review all data on the meter’s display or download with the included software Three point calibration with automatic buffer recognition indicating the number…

  • labForce® (powered by Thomas Scientific)

    The labForce® PC300 Benchtop pH/Conductivity Meter features automatic calibration, automatic temperature compensation, data storage, timing measurement, clock display, RS-232 output, function setting and self-diagnose. It has three measuring modes for your specific measuring needs: stable…

  • Bellco Glass

    Specifications: Cable Has Ak9 Probe Connection And Bnc Controller Connection. Size: 6"

  • SevenGo Duo pro™ combines maximum measurement accuracy and a range of functions that incorporate user-friendly operation with exceptional safety. SevenGo Duo pro™ meters are used in regulated sectors for the pharmaceutical, chemical, cosmetics and food & beverage industry. The kit…

  • Sper Scientific

    Rugged housing with large LCD displaying the parameter being measured together with time, date and temperature (in ºC or ºF). Automatic or manual temperature compensation Automatic or manual ranging Automatic buffer recognition Digital and analog outputs Min/Max and 99 data points …

  • Sper Scientific

    The Sper 850048 Combination Water Meter can Measure Dissolved Oxygen, pH, Conductivity, TDS, Salinity or Temperature Using Different Probes. This kit includes includes one conductivity/salinity probe. Additional probes (optional) also allow it to operate as a highly accurate pH meter, conductivity…

  • LaMotte

    Microprocessors have enabled meter manufacturers to combine many features into smaller designs with better accuracy. The 5 Series handheld pH meter includes electrode and temperature probe, and is available with or without a carrying case. Push button operation Three point…

  • Thermo Scientific Orion Star A213 Dissolved Oxygen (DO) Benchtop Meter is the ideal choice for any lab. Get the information you need quickly and easily from the large, backlit graphic LCD display. Informative display shows dissolved oxygen in percent saturation or concentration and…

  • Thermo Scientific Orion

    Protect your portable meter using Thermo Scientific™ Orion™ Star A series portable meter protective armor for use with Thermo Scientific™ Orion™ Star A series portable meters (Star A320, Star A220 and Star A120 series). Portable meter armor adds protection around the meter screen and includes a…

  • The ProQuatro was designed with the 4-port Quatro cable in mind. Combine 4 sensors on a single cable for comprehensive multiparameter sampling to measure temperature/conductivity, DO, and any two ISEs among pH, ORP, ammonium, chloride, or nitrate. Pairing the ProQuatro with the 4-port cable creates…

  • Simple to Use Benchtop Meter for Easily Measuring pH and ORP. Designed with a large LCD Display and six instructional menu buttons, AB23PH is a simple and straightforward pH meter. Auto buffer recognition and 3-point calibration capability ensures a reliable calibration result. Stand-alone holder…

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    Thermo Scientific Orion

    Stir samples for better accuracy without the difficulty of a separate stir plate and stir bar. Orion stirrer probe with paddle, for benchtop Orion Dual Star and VERSA STAR series meters Provides automatic solution stirring with direct control from Thermo Scientific™ Orion…

  • The EcoSense ® pH10A pen-style instrument provides an ultimate feature set over similar competitive models. The pH10A features an easy-to-use graphic interface, simple one-hand operation, memory, and low cost of ownership over the life of the product. The easy, user-replaceable electrode…

  • The AB33M1 utilizes 2 independent measuring channels which can work simultaneously. With multifunctional touch keypads, AB33M1 makes measurement simple and fast. The intelligent i-Steward monitors the condition of electrodes, ensuring the accuracy of the results. A 1000-item memory for measurement…

  • Thermo Scientific Orion

    Get the readings that you need where you need them with the Thermo Scientific Orion Star A221 pH Portable Meter. The large, backlit graphic LCD display shows pH/mV/RmV and temperature along with electrode status, time, date and calibration points. Anyone can use this meter with its plain…

  • Mettler Ingold pH Probe w/ VP Connector. Specifications: Mettler Toledo Ph Probe – Inpro Seris Low-Maintenance Ph-Electrodes With Vario Pin Connection Mounting Diameter 12mm Insertion Length 425mm Ph Range 012 Temperature Range 140c Pressure Resistance Bar Up To 4 Bar…

  • The Thermo Scientific™ Expert pH Pocket Tester is designed for on-the-go measurements of pH and temperature. The Expert pH Pocket Tester is best used in applications such as hydroponic gardening, aquaculture, agriculture, pools, cooling towers, and more! Large 4 digit double line…

  • The SevenGo Duo pro™ pH meter combines maximum measurement accuracy and a range of functions that incorporate user-friendly operation with exceptional safety. SevenGo Duo pro™ pH meters are used in regulated sectors for the pharmaceutical, chemical, cosmetics and food & beverage…

  • Oakton

    High ±0.01 pH accuracy at economical prices Reads pH and temperature Automatic Temperature Compensation (ATC) All push button operation Three-point pH calibration Auto buffer recognition Hold function; Auto-off Use with most pH electrodes with BNC connectors …

  • ORP Probe for Professional Plus Handheld Multiparameter Meters. For lab-grade and field applications Easy user-replaceble sensor allows for quick sensor replacements if needed Measure ORP (oxidation reduction potential), or redox, quickly and easily with the 1002 sensor

  • Electrodes 4258A53 electrode allows ORP measurements to be performed with all WTW pH/mV meters. Requires 4258A57 cable for use with Inolab Meters.

  • Get better testing through better design with the Thermo Scientific™ Orion™ Star A and Versa Star™  Electrode Holder. The Orion Star A and Versa Star electrode holder head has identifiable slots and offers the following benefits: Adjustable probe heights reduce…

  • Measure pH quickly and easily in the lab with the 110 sensor. Lab-grade, pH/temperature sensor with 1-meter cable For use with the pH100 instrument Six-month sensor manufacturer’s warranty

  • Highly Reliable and User-Friendly pH Benchtop Meter with Electrode (ST310) for Standard Laboratory Applications with multifunctional touch keypads, AB33PH makes measurement simple and fast within 3 steps. The intelligent i-Steward monitors the condition of electrodes for accurate results. Auto…

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