Portable Digital PH Meter Pen - Accurate 0.01 pH Testing, Easy-to-Use LCD Display, Auto Calibration for Aquariums & Hydroponics, Compact Design

Operating Voltage: ≤36V

Battery Properties: Non-rechargeable Battery

The PH-2 Pro Meter pH is a newly developed pH meter that is similar to litmus paper with a color-changing backlight display|. Features: Easy to Use: Simply immerse the pH meter electrode in the solution to be tested, readings are quickly displayed on a large LCD display|. Auto Calibrated: Just press a button to finish the calibration|. Fast and Accurate Results: No need to work with those annoying color charts and test strips

Compact Portable Design: Total concealed fit in your bag or pocket for easy, casual carrying Wide Application: Ideal instrument for any aquarium, the fishing industry, swimming pools, spa, school laboratories, food & beverage, drinking water etc

Specification: Display: LCD Digital Measuring Range: -2.00~16.00pH Resolution: 0.01pH Accuracy: ±0.01pH Operating Temperature: 0~80°C Probe Type: Precision glass bulb electrode Power Supply: 2*1.5V LR44 Batteries( Does not include battery) ATC Function: Automatic temperature compensation function. Reset Function: Turn it on, Press the ON/OFF key for 3 seconds, and then release it. When "----" appears on the screen, the reset is successful

Power-off storage function: The data will be automatically saved after the battery is pulled out and stored for one month|. Litmus test function: The color of the LCD will change according to the pH value, just like a litmus test strips

Operation: 1. Remove protective cap. 2. First rinse the electrode with distilled water and suck it with filter paper. 3. Turn the meter on by pressing "ON/OFF" key. 4. Immerse the pH meter electrode in the solution to be tested (should not be over the immersion line). 5. Stir gently and wait around 30 seconds till the reading stabilizes. 6. After finishing, clear the electrode with pure water, turn the meter off by pressing "ON/OFF" key. 7. Always replace the protective cap after use

Calibration: 1. Turn on the pH meter, clean the electrode in distilled water. 2. Immerse the electrode in pH 6.86 standard buffer solution. 3. Press the "CAL" button. Wait until the display digital is 6.86pH and steady. 4. Clean the electrode in distilled water and dry it, immerse the electrode in pH 4.00 standard buffer solution. 5. Press the "CAL" button. Wait until the display digital is 4.00pH. Then complete pH 4.00 calibration

6. Clean the electrode and dry it, put the meter into PH 9.18 standard buffer solution. Check if the reading is correct between 9.17-9.19pH  Calibration Powder: PH standard solid substance It can be used after adding water. Suitable for the calibration of any type of pH meter. Each package can prepare 250ML standard solution (Be sure to add water according to the required ratio, otherwise it will affect the accuracy of the calibration and increase the error)

Note: In the following cases, the PH meter must be re-calibrated: 1. Lengthy periods of inactivity; 2. Very Frequently use; 3. The measurement accuracy requirements are relatively high; 4. The "CAL"(calibration) button was pushed and electrode exposed to air for extended period of time