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.

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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  • Thermo Scientific Orion

    Thermo Scientific Orion Star A211 pH benchtop meters are easy to use, dependable laboratory meters with advanced features and functions. Selectable read modes and stability indicator give you flexibility and control over your testing. All critical data is shown with your measurements including…

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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…

  • For pHtestr 30 purchased before Oct. 2019 Replace electrodes when they break, no longer hold calibration, cannot be rehydrated, or are not compatible with your sample. For your convenience, cables, power adapters, and other accessories are available for your Oakton meters and pocket testers. …

  • 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…

  • 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

    For ORP (Oxygen Reduction Potential) measurement in water treatment, disinfection and labs. Highly stable and accurate readings with a large LCD display. Designed for simple one-hand operation. Features auto power off, hold function, and a low battery indicator. The case is IP65 waterproof, and…

  • Thermo Scientific Orion

    Perform basic pH measurements quickly and reliably with Thermo Scientific™ Orion™ Basic Electrodes, for use with Orion™ Russell meters.

  • Pocket-sized ISE meter with interchangeable sensor modules Waterproof design with rubberized housing Automatic shut-off and low battery indicator Memory saves calibration values and stores up to 15 readings Chlorine and pH also display sample temperature PockeTester…

  • 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 (model 260) and phono jack printer…

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    Milwaukee Instruments

    Control the pH of your tank/reservoir AUTOMATICALLY! The MC122 pH controller and dosing pump (MP810) provides fully automated pH control of aqueous solutions in hydroponic systems. It has been specifically designed to control the pH in mixing tanks for fertilization. The small and precise…

  • Hanna Instruments

    Dedicated to soil pH measurement Specialized soil pH electrode Multi-level LCD display User friendly operation using only 2 buttons On-screen tutorial messages Automatic Temperature Compensation Automatic one or two point calibration BEPS (Battery Error Prevention System)…

  • labForce® (powered by Thomas Scientific)

    The labForce® TS-PC200 Portable pH/Conductivity Meter combines advanced digital processing technology and software design, specially designed for all types of professional pH and conductivity measurements. The meter has a ±0.01 pH accuracy in a range of -2.00-19.99 pH., with…

  • Great general-purpose meter for laboratories where GLP data-management is required Large display with bright backlight Dynamic reading stability indication indicates when your measurement is stable Up to 500-point memory with date-time stamp for GLP Password protection for both setup…

  • labForce® (powered by Thomas Scientific)

    The labForce® TS-PH200 Portable pH Meter combines advanced digital processing technology and software design, specially designed for all types of professional pH measurements. The meter has a ±0.01 pH accuracy in a range of -2.00-19.99 pH., with 0-100°C Automatic Temperature Compensation…

  • The EcoSense® line of compact, handheld instruments provides the most accurate data in the most affordable format. The instruments feature an easy-to-use interface, one-hand operation, IP67 waterproof case, and low cost of ownership over the life of the product. The pH100A measures pH, mV/ORP…

  • Measure conductivity, total dissolved solids (TDS), salinity, resistivity, and temperature Brilliant backlit display with dynamic stability indication Up to 500 point memory with date-time stamp for GLP Output data to printer or PC Accepts either 2-cell or 4-cell electrodes Features…

  • The Thermo Scientific™ Orion™ Lab Star EC112 Conductivity Bench Meter is ideally suited for laboratories with users of varying levels of technical expertise and who require a simple to-calibrate and use meter for routine conductivity, salinity and TDS testing. Scientists have trusted…

  • Automatically recognizes pH buffer standards Large LCD dual-line display shows pH and temperature readings simultaneously Rugged IP67-rated housing is waterproof, dustproof, and floats in water Leakproof cap with fill line functions as a sample/calibration and hydrating cup …

  • Hach products are intended for sale/shipment within the US only. International customers should contact their local Hach distributor to place orders for Hach products.

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    labForce® (powered by Thomas Scientific)

    The labForce® M1000 Benchtop pH/mV/ISE/Conductivity/DO 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:…

  • 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…

  • High Performance Bench Meter for Universal pH Applications Backed by OHAUS’ century-old commitment to providing precise measurement, Starter 5000 provides accurate pH and ORP measurement for high-level experiments and research. Enhanced features, advanced technology, and high…

  • Dual display of pH or mV and Temperature ATC or manual Temperature compensation 3 point calibration ensures the best linearity and accuracy Large backlit dual LCD Stores 99 readings manually and 20M readings via 2G SD card User programmable sampling rate Built-in PC interface …

  • 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…

  • 1228Q43 is a waterproof pH, ORP and temperature meter. The housing has been completely sealed against humidity and designed to float. All pH readings are automatically temperature compensated and temperature values can be displayed in °C or °F. The meter can be calibrated at one or two…

  • LSTAR1110 The Thermo Scientific™ Orion™ Lab Star PH111 pH/mV Bench Meter is ideally suited for laboratories with users of varying levels of technical expertise and who require a simple-to-calibrate and use meter for routine pH testing. Scientists have trusted Thermo Scientific…

  • The YSI ProDSS (digital sampling system) is a portable water quality multiparameter instrument for the measurement of several critical parameters - dissolved oxygen (optical), turbidity, pH, ORP, conductivity, specific conductance, salinity, TDS, resistivity, TSS, ammonium, ammonia, chloride,…

  • PCSTestr™ 35, PCTestr™ 35 and PTTestr™ 35 Mutiple measurements in one instrument Displays measured value along with temperature — simply press a key to toggle between pH, conductivity, TDS, and salinity where applicable Waterproof, dustproof housings float …

  • Milwaukee Instruments

    Combination waterproof testers with advanced functions also include the new model pH58 for simultaneous pH and ORP measurements and temperature, which is continuously displayed on the dual level LCD. It shows readings in an extended range from -2.00 to 16.00 pH or ±1000 mV and…

  • 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…

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    Milwaukee Instruments

    With each Milwaukee Smart controller, your aquarium will have the individual attention that it needs. Each unit comes with 12 VDC adapter, mounting kit, probe, probe holder and starter calibration solution for pH. (factory calibrated for ORP) Smart Professional ORP controller. …

  • All three parameters, plus temperature, measured and displayed simultaneously! These top-of the-line waterproof meters offer features that are typically found on much more expensive models. The IP67-rated housing allows use in dirty and wet environments without harm to the meter. Datalog up…

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