PH/ORP/Conductivity/TDS Meter - LCD Display

quick info

Presto's TDS meter is an all in one solution which is used to measure the TDS i.e. concentration of total dissolved solids of the solution at different modes i.e. pH mode, mV mode, ORP mode, TDS mode...







Presto's TDS meter is an all in one solution which is used to measure the TDS i.e. concentration of total dissolved solids of the solution at different modes i.e. pH mode, mV mode, ORP mode, TDS mode, conductivity mode, Salinity mode, Resistivity mode,oC mode, etc. The instrument offers reliable and accurate test results.

The dissolved ionized solid products such as minerals, salts enhance the conductivity of the solution. The TDS meter efficiently measures the conductivity of the solution and measures the TDS of it easily and safely. Apart from this, the dissolved solids like microscope particles and sugar never affect the conductivity of the solution. To measure the TDS of the water accurately, first evaporate the water with the dissolved solutes as residue and then weighing the residue. With Presto’s TDS meter it becomes very easy to test the TDS conductivity of the solutions at different modes.




    pH Mode:

    • Range: -2.000~ 20.000pH
    • Accuracy: +/-0.002pH
    • Resolution: 0.1, 0.01, 0.001pH
    • Calibration Points: 1 to 5 points, USA, DIN, NIST Standards.
    • Temperature Compensation: 0~100oC, 32~212oF, Manual or Automatic

    mV mode:

    • Range: -0~1999.9 mV
    • Accuracy: +/-0.2 mV
    • Resolution: 0.1, 1 mV
    • Calibration Points: 1 points (Only for Relative mV mode)
    • Calibration Range +/-200mV


    • Range 0~200 mS/cm
    • Accuracy ±0.5% F.S
    • Calibration Points 1 to 5 points
    • Calibration Solutions: 10µS/cm, 84µS/cm, 1413µS/cm, 12.88mS/cm, 111.8mS/cm
    • Temperature Compensation: 0~100°C, 32~212°F, Manual or Automatic
    • Temperature Coefficient: 0.0~10.0%/°C
    • Compensation Modes Linear or Pure Water
    • Cell Constant K=0.1, 1, 10
    • Normalization Temperature: 20 or 25°C


    • Range: 0~10ppt (Max. 20ppt, depending on factor setting)
    • Accuracy: ±1% F.S
    • TDS Factor: 0.1~1.0 (Default 0.5)


    • Range: 0~10ppt (Max. 80ppt)
    • Accuracy: ±1% F.S
    • Measurement Modes: Seawater or Practical Salinity


    • Range: 0~100MΩ
    • Accuracy: ±1% F.S
    • Resolution: 0.01, 0.1, 1


    • Range: 0~105°C, 32~221°F
    • Accuracy: ±0.5°C, ±0.9°F
    • Resolution: 0.1°C
    • Calibration Points: 1 point
    • Calibration Range: Measured value ±10°C

    Other Specifications:

    • Hold Function: Manual or Automatic
    • Stability Conditions: Low or High
    • Calibration Due: 0 to 31 days
    • Power Off: Manual or Automatic (10, 20, 30 minutes)
    • Reset Function: Yes
    • Memory: Stores up to 500 data sets
    • Output: USB Communication Interface
    • Connector: BNC, 6-pin Mini Plug
    • Display: LCD
    • Power Requirements: DC5V, using AC adapters, 220VAC/50Hz
    • Dimensions: 210(L)×188(W)×60(H)mm Weight: 1.5kg




    • This mode of TDS meter offers highly accurate results as it is equipped with the large backlit LCD display.
    • The pH of the solutions can be tested on the basis of the standards such as USA/DIN/NIST or by making use of custom calibration solutions.
    • 1-5 points can be set with the push-button calibration with auto buffer recognition.
    • Automatic electrode slope display helps the user decide whether to replace the

    Conductivity Mode:

    • 1 to 5 points push-button calibration is supplied with this mode along with automatic calibration solution recognition.
    • The fair or linear water compensation advances the measurement exactness of the meter.
    • It can be operated at various selectable cell constants i.e. 0.1/1/10, temperatures 20/25°C, seawater, TDS conversion factors, and practical salinity measurement modes

    ORP Mode:

    • The absolute and relative millivolt measurement modes provide highly accurate ORP readings.
    • The only point offsets calibration of the testing device permits to regulate the presented value to a known standard.

    Other Features:

    • The automatic temperature compensation offers accurate reading over the complete range.
    • The auto-hold function of the device freezes stable value for easy viewing and recording.
    • Manual temperature calibration of the device improves temperature deviation.
    • Selectable temperature unit i.e. oC or °F helps to fulfill the requirements of different applications.
    • Calibration due reminder encourages the operators to regulate the meter regularly.
    • Stability indicator of the device automatically displays the status of current measurement.
    • Automatic electrode analysis shows the slope of the electrode and zero point offset.
    • Shows “Help messages” on the LCD screen for the operators as a useful guide that helps them to start the meter with great ease.
    • It is provided with the Expanded memory that can store and recalls up to 500 readings.
    • The built-in real-time clock stamps help to store the data to meet GLP standard.
    • The stored data can be copied easily to a computer via. USB Interface.
    • The menu of the meter system permits setting the 12 parameters, including the resolutions, calibration points, measurement units, stability conditions, etc.
    • The “Reset” feature of the device automatically resumes all constraints back to factory restore options.



The pH conductivity meter of Presto is a very highly accurate instrument and I have been using this instrument in my laboratory from a long time and I have received the most accurate test readings from the instrument for my chemical solutions.

— Prateek Girdhar

Very easy to use and read. Its bright LCD display is very eye catching. It gives very precise and repeatable results.

— Manish Singh

Easy to use and accurate reading can be obtained.

— Anuj Trivedi

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