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Home > Water Filter Brands > HM Digital Testing Products > HM-DIGITAL-PH-200


HM Digital PH-200 Waterproof pH Meter

7.3" H x 1.3" W x 1.3" D

HM Digital PH-200 pH and Temperature Meter with Waterproof Housing
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Product Code: HM-DIGITAL-PH-200
Retail Price: $99.95
  • HM Digital PH-200 Waterproof pH Tester:
  • The PH-200 is ideal for all pH testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs & scientific testing, pools & spas, ecology testing, boilers & cooling towers, water treatment, wine, coffee, agriculture and more.
  • The PH200 pH Meter measures pH and temperature.
  • The HM Digital pH Meter has auto-ranging three point calibration with digital fine tuning.
  • This PH-200 Tester includes storage solution in a sponge embedded in a clear cap.
  • This Meter comes with waterproof housing (IP-67 rating).
  • The PH-200 pH Meter simultaneously displays temperature.
  • Measurement Range: 0-14 pH.
  • The PH-200 meter comes with digital automatic calibration (one point) and digital fine tuning.
  • This Meter has automatic temperature compensation (ATC).
  • This pH Testers is equipped with auto-off function, data-hold function and low-battery indicator.
  • Display: Large and easy-to-read LCD screen includes simultaneous temperature reading.
  • The Sensor for pH Meter is replaceable with the SP-P2 sensor available below.
  • Factory Calibrated: The PH-200 meter is three-point factory calibrated to 4, 7, and 10 pH. The meter can be recalibrated with digital calibration using the push buttons, rather than a screwdriver.
  • The meter also includes a cap, batteries, lanyard, and pH 7.0 buffer.
  • Always make sure your sensor is kept in the storage solution.
  • If dry, refill the cap with the OP-STOR storage solution.


  • NOTE: Your PH-200 is shipped with a small amount of storage solution in the cap. The sponge should be moist (not dripping wet),but it is possible that this solution can leak out during shipping. If you have received a PH-200 with the cap (or sponge) dry, simply refill it with the enclosed extra storage solution and allow it to soak,standing upright, for one hour.Your meter will be perfectly fine and the small extra bottle is included for this purpose. Never refill the cap with distilled water and never use the cap for testing purposes.
  • HM Digital PH-200 Waterproof pH Tester Specs:
  • pH Range: 0 - 14.
  • Temperature Range: 0-80 degrees C; 32-176 degrees F.
  • Resolution: 0.01 pH.
  • Temperature resolution is 0.1 degrees C/F.
  • Accuracy: +/- 0.02 pH.
  • Calibration: Digital automatic calibration with digital fine tuning.
  • Probe: Replaceable glass sensor and reference tube electrodes.
  • Housing: IP-67 Waterproof.
  • Power source: 3 x 1.5V button cell batteries (included).
  • Dimensions: 7.3" H x 1.3" W x 1.3" D.
  • Weight: 3.4 oz.
  • Manufacturer: HM Digital PH-200

The PH-200 is also known by the following part numbers:

  • PH-200, PH200
  • HM Digital PH-200 Waterproof pH and Temperature Tester Instructions:
  • Always make sure your sensor is kept in an electrode storage solution.
  • If dry, refill the cap with the OP-STOR storage solution.

  • pH Measurements:
  • Remove the cap.
  • Press the ‘ON/OFF’ button. The display will become active.
  • Dip the meter into the water sample, liquid or solution to be tested.
  • Lightly swirl the meter to ensure the removal of trapped air bubbles or electric charges. Do not tap it against the glass.
  • The meter will display a reading almost immediately. Keep the meter in the liquid until the reading stabilizes (approx. 30 seconds) for an accurate reading. .
  • NOTE:It is a normal function of pH for the reading to fluctuate and not fully stabilize.
  • To view the reading of the liquid, quickly press the ‘HOLD/MODE’ button while the meter is in the liquid. This will hold the reading on the screen. Quickly pressing the ‘HOLD/MODE’ button again will release it.
  • Press the ‘ON/OFF’ button to turn the meter off.
  • Shake any excess water off the meter and rinse with distilled or de-ionized water. Put the cap back on.

  • Temperature Measurements:
  • The temperature reading is always displayed on the LCD panel during measurement mode, and is shown simultaneously for pH readings. It is not shown when the meter is in calibration mode.
  • The default temperature reading for the meter is in Celsius. To change the temp mode, quickly press the ‘TEMP/CAL’ button to switch from Celsius to Fahrenheit or vice-versa.
  • Remove the cap.
  • Press the ‘ON/OFF’ button. The display will become active.
  • Dip the meter into the water sample or solution to be measured.
  • The temperature reading will change immediately (unless the solution is at room temp). For very hot or cold liquids, the reading may take slightly longer to stabilize.
  • Press the ‘ON/OFF’ button to turn the meter off.
  • Shake any excess water off the meter and rinse with distilled or de-ionized water. Put the cap back on.
  • HM Digital PH200 Manual
    (Download Adobe Reader).

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