Precision electronic pH meter at a great hobby-friendly price! Milwaukee Instruments Portable pH Meter delivers quick and reliable aquarium pH measurement with 0.01 pH resolution for UNDER $100! Portable, electronic pH meter boasts battery-powered operation allowing convenient pH measurement of one or multiple aquariums without tangling power cords or the need for an electrical outlet.
Milwaukee Instruments Portable pH Meter is a precision electronic device featuring a faster processor and a large easy-to-read LCD screen. Lightweight, ergonomic unit boasts simple operation with manual 2-point calibration and temperature compensation. Retains calibration even when the battery is removed for replacement.
Milwaukee Instruments Portable pH Meter includes: pH Meter, SE220 pH Probe with 1 Meter Cable, 9V Battery, Calibration Screwdriver, and 20ml pH 7.01 & 4.01 Calibration Solutions.
||0.00 to 14.00 pH
||Manual Setting 0 to 50°C
||Manual, 2-point with use of Offset and Slope Trimmers
||0 to 50°C, 95% RH max.
||1 x 9V alkaline (included)
||Approximately 70 hours of use
||3-1/8" x 1-1/4"x 5-5/8" high
Additional Calibration Solution
, Rinse Solutions
and Storage Solution available here
Shop all Aquarium Controllers and Monitors.
Please click "More Information" for Instructions.
- The meter is supplied complete with a 9V battery. Slide off the Battery Compartment Cover on the back of the meter. Install the battery into the Battery Clip Connector while observing polarity.
- Always remove the Electrode Protective Cap before taking any measurement. If the electrode has been left dry, soak the tip (bottom 2.5 cm) in Rinse Solution for a few minutes to reactivate.
- Connect the pH Electrode to the BNC Socket on the top of the meter.
- Turn the instrument on by pressing the ON/OFF Key.
- Make sure that the meter has been calibrated before taking any measurement (See Calibration Procedure).
- Set the Temperature Knob to the value of testing solution (measured with an accurate thermometer).
- Immerse the tip (bottom 2.5 cm) of the electrode in the sample water and stir gently.
- After completing measurements, switch the meter off and store the electrode with a few drops of Storage Solution in the Protective Cap.
Two calibration buffers are required
- pH 7.01.
- pH 4.01 if you are measuring in acid range (pH 0 - pH 7) or pH 10.01 if you are measuring in alkaline range (pH7 - pH 14).
Use two beakers for each pH buffer - one beaker for rinsing the electrode and the other for calibration.
Use a thermometer with 1°C accuracy to measure the temperature of the Calibration Solution.
- Remove the Protective Cap from the electrode. Rinse the tip of the electrode with some pH 7.01 buffer solution and then immerse the pH electrode into a pH 7.01 buffer solution.
- Take the temperature of the buffer solution with a thermometer and set the Temperature Knob to the measured temperature (e.g. 15°C).
- Adjust the OFFSET Trimmer (pH 7) on the front panel with a small screwdriver until the LCD shows the pH value at the temperature of the buffer (see the pH versus temperature chart). E.g. in this case, if the temperature is 15°C, the meter display should be adjusted to read "pH 7.04."
- Now rinse the pH electrode in the first pH 4.01 beaker and then immerse it into the second pH 4.01 beaker or follow the same procedure if using pH 10.01 buffer.
- Adjust the SLOPE Trimmer (pH4/10) on the front panel with a small screwdriver until the LCD shows the pH value of the buffer at the temperature of measurement (see the pH versus temperature chart). E.g. In this case, if the temperature is 15°C, the meter display should be adjusted to read "pH 4.00" (or pH 10.01 would be adjusted to 10.12 pH).
- Calibration is now complete.
pH Versus Temperature Chart:
||4.01 Buffer Solution
||7.01 Buffer Solution
||10.01 Buffer Solution
When the battery becomes weak, the meter will display a Low Battery Indicator icon. When the Low Battery Indicator icon appears only a few hours of battery life remains. A low battery will result in unreliable measurements. Prompt battery replacement is required.
Battery replacement must only take place in a non-hazardous area using an alkaline 9V battery.
Turn the meter off and then slide the Battery Compartment Cover located at the rear of the meter off and replace the 9V battery with a new one. Make sure the Battery Contacts are fully engaged in the Connector and seat the battery in its compartment and replace the cover.