The price of this link does not include backlighting, and an additional 5 yuan is needed for backlighting.

The model of this PH pen is PH-02, which is a best-seller on platforms such as Amazon, eBay, and AliExpress. Support for printing a logo is available for orders of 500 or more. If you need a model with backlighting, please contact customer service.

Need backlight, 5 yuan extra.

Parameter:

Model: PH-02

Battery Voltage: 1.5V*2

Accuracy: ±0.01 (25°C)

Resolution: 0.01

Weight: 51g (with box: 110g)

Dear customer, due to the variety of colors available for this item, please note the color you require when placing your order. If you do not specify, we will default to sending the yellow version!

Single weight: 0.11.

Weight: 11.1KG.

Volume: 36.7*37*33.

One piece: 100/PS.

This item is of export quality for European and American countries. Please use it with confidence.

This item is of export quality for European and American countries. Please use it with confidence.
Warning: To maintain the stability of the tester, please do not press the CAL button at will when using normally!
This product features precision glass bubble electrodes with high sensitivity, and the screen display of 16.00 or numeric flickering after power-on is a normal phenomenon.

Dimensions: 155mm × 31mm (W) × 18mm (H)
Outer Box Size: 167mm×52mm(W)×30mm(H)

Measurement Range: 0.00-14.00PH
Resolution: 0.01PH
Error: 0.05PH
Working temperature: 0°C-60°C
Battery: 2x1.5V (LR44 type button cell)

In the following circumstances, the pH meter must be recalibrated:
After calibration, it has been used (or placed) for a long time.
Appear inaccurate phenomena

The shelf life of the medicine powder is 2 years.

Pencil calibration method
1. First, take about 250ML of neutral water (preferably distilled water or pure water) (do not use tap water, mineral water, or mountain spring water as it may affect the data)

2. Mix the calibration powder 6.86 (the green packet), and stir well to ensure complete dissolution.

1. Remove the protective cover from the test pen - turn on the device - immerse the probe into the calibration solution prepared. If the reading matches 6.86 or is only slightly off, no calibration is needed. If the value deviates significantly from 6.86, press the CAL button for three seconds. After the screen flashes, release your hand. The automatic calibration will proceed. It is expected to take about 5 seconds for the display to show "END" after the calibration is complete. Take out the pH pen and clean the electrodes with distilled water or pure water, then absorb the liquid.
4. Calibrate the 4.00 calibration powder in the same way
5. Generally, only 6.86 and 4.00 calibration powders are needed, and no need to use 9.18 calibration powder.