Product Information:Parameters:Product Name: PH Water Quality Pen DetectorProduct Style: Electrode integratedResolution: 0.01PHDetection Range: 0.00 ~ 14.00PHCalibration Method: 2-point automatic calibrationTemperature compensation: ATC automatic compensationBattery type: 2 * 1.5V button battery(Battery not included)Product size: about 155 * 31 * 18mmProduct net weight: about 50gInstructions:➤ Using Steps:1. Remove the protective cover.2. First rinse the electrode with distilled water, and use a filter paper to absorb the moisture attached to the electrode.3. Turn on the switch located on the battery compartment.4. Insert the instrument into the test solution, and immerse the measuring electrode in the test solution.5. Stir the solution gently and wait for about two minutes to read the displayed value. After use, clean the electrodes. (Don't touch the glass electrode head with your hand or other objects when using. After the measurement, rinse with water and dry it). Turn off the switch and put on a protective cover.➤ PH calibration:1. Rinse the calibration powder with 250ml of distilled or purified water, immerse the PH electrode in a mixed phosphate standard buffer solution with a pH of 6.86 (or 4.0), and shake it gently.2. With a yellow tool, facing the round hole behind the pH pen, turn left or right to adjust the calibration potentiometer until the displayed value matches the pH value of the standard buffer solution at ambient temperature of 6.9 (or 4.0).3. Do not contaminate the medicine. Seal it with plastic wrap after calibration, and it can be reused. After calibration, wash it with pure water. If it is not used often, it can be calibrated every 3 or 6 months!
J**B
Worked once then died
Worked fine the first time, would be great if it worked again after that...
R**0
After a few uses it stopped working
The calibration process was difficult and did not give consistent results. The first few times I used it seemed OK but then it started counting down from 10 (highly alkaline) whenever I tried to get a reading. Sometimes it didn't stop counting down before it timed out altogether. Easy to read, but what use is that if you can't trust the reading?
R**W
Excellent value and speedy delivery
Easy use
A**S
It does not work
We calibrated it it does not work, basically useless avoid. Cheap for a reason.
E**J
No batteries.
Unable to test as there were no batteries with the tester.Returned for refund.
D**C
No good
Cheap pen that needed to be calibrated after almost every use then stops working. Only lasted a few months.Avoid
S**
Perfect..
Great product great price
T**Y
Stuff missing
There is 2 pH buffer powders missing so can not calibrate & its really not worth the trouble to send it back.Buy from elsewhere
Trustpilot
5 days ago
3 weeks ago