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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  • 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…

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    Oakton

    Achieve professional results at an economical price! The microprocessor-based pH 6+ meter gives you high accuracy and reliability. Use this meter to take pH, mV and temperature measurements. The millivolt readout lets you take ORP readings. Meter includes a protective rubber boot that also acts as…

  • labForce® (powered by Thomas Scientific)

    The labForce® PH100 Benchtop pH Meter provides accurate measurement, quick response time, and consistent result thanks to the advanced digital filtering technology. It has three measuring modes for your specific measuring needs: stable measurement display mode, timing measuring mode, and…

  • 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 …

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    labForce® (powered by Thomas Scientific)

    The labForce® TS-D200 Portable pH Meter is designed for professional pH measurement of dairy products (milk, buttermilk cream, yogurt, etc.) and other liquid food such as jam, BBQ sauce, syrup, etc. The 3-in-1 Glass pH/Temperature Electrode uses Proselyte electrolyte, Silver Ion Trap reference…

  • 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…

  • Advanced pH Meter Reads either pH (in 0.01 resolution) or mV in large digits, with time, date, and temperature (in ºC or ºF) shown simultaneously on the lower display. Also indicates stable reading, low battery and displays calibration data. Scroll 99 data points with time stamps and min/max…

  • 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…

  • Easily toggle between pH, mV, conductivity, TDS, and temperature measurements at the touch of a button Space-saving design takes up less room on the bench than other meters Large display lets you see your measurements from across the lab Conductivity and TDS autoranging chooses the best…

  • Thomas No. 1197F28: pH Sensor, with o-ring, to be used with HI 9829 and HI 98290 series multiparameter meters Thomas No. 1197F29: pH/ORP sensor, with o-ring, to be used with HI 9829 and HI 98290 series multiparameter meters Thomas No. 1197F30: Ammonium ISE sensor, with o-ring, to be…

  • Thermo Scientific Orion

    Thermo Scientific Orion Star A121 pH Portable Meters combine simplicity with accuracy. A large LCD displays pH or mV readings along with temperature. Icons provide quick updates on battery life, electrode status and calibration information. Simple button layout and onscreen messages help with…

  • This high performance economy microprocessor-based pH/ORP/Temp Bench meter is an ideal tool in schools, laboratories and production plants. It is provided with a series of new diagnostic features which add an entirely new dimension to the measurement of pH, by allowing the user to dramatically…

  • Affordable optical RDO technology eliminates maintenance time and costs Durable waterproof and dustproof design with IP67 rating Eliminates costly, tiresome membranes and solutions Barometric pressure and salinity correction USB and RS-232 output for up to 500 data sets …

  • The pH/Ion Meter SevenDirect SD50 provides accurate pH and ion concentration measurements for almost any sample across a wide range of applications. The EasyPlace electrode arm and protective cover are included with the instrument. The benchtop meter's ease of use, data handling…

  • The portable WTW ProfiLine meter series is available in three (3) series versions, the 3110/3205-Basic series, 3210-Professional series and 3310-Advanced series, each with a distinct level of sophistication for the independent measurement of pH, conductivity, or dissolved oxygen. All versions have…

  • 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…

  • 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…

  • The fermprobe pH electrode with s8 metric cap features a standard s8 detachable cable connector on a metric pg 135 threaded polymer cap the design requires the rotation of the electrode during installation this style of pH fermprobe is the first choice for small autoclavable bench-top vessels all…

  • The next step in the evolution of OHAUS’ original Starter Series, the all-new AQUASEARCHER™ AB33EC bench 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…

  • *** Accessories Available - Meter has been discontinued *** Basic, inexpensive meter produces reliable results Waterproof (IP67) Measures/compensates temperature in °C or °F European CE Mark Anti-glare coating Powered by long-lasting batteries (est 500…

  • Thermo Scientific Orion

    Get high accuracy, premium performance and ultimate flexibility with the Thermo Scientific™ Orion™ Versa Star PRO Benchtop Meter with pH Module. Meet your most challenging applications for pH, mV, ORP and temperature. Easily view measurements on the stunning color display and customize…

  • Measure pH, mV (ORP) and temperature accurately in the laboratory with the YSI pH 1310 or 1310P with built-in printer. The TruLab pH 1310 benchtop meter is the ideal laboratory instrument for reliable pH/mV measurements with automatic documentation for GLP compliance. The 1310 benchtop is an…

  • The pH/conductivity Meter SevenDirect SD23 provides accurate pH and conductivity measurements for almost any sample across a wide range of applications. The EasyPlace electrode arm and protective cover are included with the instrument. The benchtop meter's ease of use, data handling…

  • The Thermo Scientific™ Expert CTS Pocket Tester is designed for on-the-go measurements such as – Conductivity, TDS, Salinity, Temperature and other related electrochemistry measurements. The Expert CTS Pocket Tester is best used in applications such as environmental monitoring,…

  • 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…

  • Easy user-replaceble sensor allows for quick sensor replacements if needed.  No tools necessary.  Measure pH quickly and easily with the 1001 sensor Use with the Professional Plus instrument Cables must be ordered separately One-year manufacturer’s sensor warranty

  • The perfect combination of the most advanced electronics technology, sensor technology, and software design Measured parameter and temperature shown on display at same time Stability, calibration, and low-battery indicators Display filter improves measurement, speed, and accuracy mV mode…

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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…

  • Hanna Instruments

    Hanna Instruments is proud to introduce the world’s most innovative pH, EC, and DO meter... edge ® . edge ® is thin and lightweight, measuring just 1⁄2” thick and weighing less than 9 ounces. edge ® has an incredibly wide viewing angle, 5.5” LCD and a…

  • Rugged, waterproof, and dustproof with an IP67 rating for use in any environment Nonslip ergonomic design for comfortable handling Easily view measurements with large monochrome LCD with white LED backlighting Download and analyze data with USB output and phono jack printer connections Take…

  • Convenient, compact design with large display Measured parameter and temperature shown on display at same time Utilizes same electrodes as Oakton 6+ series Stability, calibration, and low-battery indicators Waterproof and dust-resistant IP57 rating – great for use under harsh…

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