The 228 pH meter is an easy-to-use handheld device for measuring pH, mV and °C. With the 228 pH meter, both temperature and pH values can be directly stored onto a SD card (in Excel format), or transferred to a PC through an RS-232 interface. An optional software and data cable for the 228 pH meter are available as optional accessories to transfer data to a computer. Temperature compensation in the 228 pH meter can be done manually or automatically by way of the temperature sensor which is included. 

The pH meter has two calibration points. The calibration can be done with the trimmer on the side of the device which is protected under a cover. With this combined device, the user can determine pH value, temperature or Redox potency (ORP). For the latter measurement parameter, a Redox electrode must be ordered separately from the 228 pH meter. We recommend the ORP-14 electrode. The pH meter is powered by a 9V battery which is included.

pH Meter 228

  • Measurement range

    0.00 to 14.00 pH
    -1999 to 0 to 1999 mV (only with the optional Redox electrode)
    0.0...65.0 °C or 32 ... 149 °F (only the temperature sensor)
    Resolution

    0.01 pH
    1 mV
    0.1°C
    Accuracy (at 20°C)

    ± (0.02 pH + 2 digits)
    ± (0.5 % + 2 digits)
    ±0.5°C
    Calibration Automatic three-point calibration
    Temperature compensation automatic from 0 to 65°C or manual between 0 and 100°C removing the temperature sensor
    Electrode pH PE-03 electrode,
    1 meter cable and BNC plug
    temperature range: 0 ... 60 ºC
    Measurement rate adjustable from 1 second up to
    8 hours 59 min 59 sec
    Display  LCD display: 52 x 38 mm
    Memory  SD card from 1 ... 16 GB
    (2 GB memory card included)
    Interface RS-232
    Software optional
    Power supply 6 x 1.5 V AA batteries /
    mains adapter 9 V (optional)
    Operating conditions 0 to 50°C max. 80% r.h.
    Dimensions 177 x 68 x 45 mm
    Weight 490 g

Copyright© 2020 by Tops Instruments Supplies Co. graphics, data sheet, photos and videos all rights reserved.