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pH Data Loggers and Recorders

pH data loggers can be used for monitoring and recording pH levels in lab testing, aquariums, estuaries, lakes, streams, rivers, and oceans. Handheld pH data loggers are great for spot testing and short term experiments where as other units are better suited for long term deployment applications.

MicroDAQ.com offers a large selection of loggers ensuring that we probably have multiple options for almost any application. Our Technical Sales Representatives are available by chat, email, or phone and they are always happy to help you find the best solution for your particular application.


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  1. Reed Instruments SD-230 pH ORP Meter w/ SD Card Data Logging



    pH ORP Meter w/ SD Card Slot for Data Logging

    • Measures and Records pH (ORP Values), mV and Temperature Using External Sensors (Sold Separately)
    • Selectable Measurement Range of 0 to 14pH or 1 to 13pH
    • Recorded Data Logs to SD Card with Easy Analysis Using Microsoft® Excel®
    • LCD Display Shows Current Readings, Max and Min Readings and Battery Status
    • 1 Second to 1 Hour User-Selectable Sampling Rate
    • Powered by User-Replaceable Batteries with Optional AC/DC Powered Adapter (#AP-9VA-110V)

    Requires pH Electrode with BNC Connector and pH Buffer Solution

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  2. Onset HOBO MX2501 Bluetooth pH and Temperature Data Logger



    Bluetooth pH and Temperature Data Logger

    • Long-Term pH and Temperature Measurements in Estuaries, Lakes, Streams, Rivers and Oceans (Salt and Freshwater Environments)
    • Wireless Transmission of Recorded Readings to Phone or Tablet Using Bluetooth Smart LE Communications
    • 2.0 to 12.0 pH and 2C to 50C Measurement Ranges and +/-0.10pH and +/-0.2C Accuracy
    • User-Replaceable Lithium Battery with 1 Year Typical Life (1 Minute Sampling Rate and Bluetooth Always On)
    • Stores up to 43,300 Measured Readings with Date/Time Stamp if Bluetooth Communications Not Available

    Includes pH Electrode and Lithium Battery. HOBOmobile App Available on the Apple Store (iOS) and Google Play (Android)

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Measurement and recording or pH levels with a Data Logging Recorder. LCD Display for current, min and max readings, battery-powered and user-replaceable battery.