Backlight Digital PH Meter for More Accurate Test

Take the Readings in the Dark

Specifications:

• PH testing range: 0.00 to 14.00
• Resolution: 0.01 pH
• Accuracy: +/- 0.01 pH (20 degree)
• Working tempreture: 0 to 60 degree
• Weight: 51 grams
• Dimensions: Length 155 mm, Width 31 mm

This digital PH meter package includes:

• One meter device with 2 batteries (AG13/LR44).
• One manual for instruction and calibration (Incorrect, upgraded as below).
• Two sachets of PH buffer powder (Default pH4.01 and pH6.86,  pH6.86 and pH9.18 if required.)
• One plastic box

Importance:

1. The glass electrode is fragile, avoid to be touched or hit, always keep the cap closed while not using, no guarantee for its damage.
2. The device is pre-calibrated by the manufacturer, not necessary to calibrate it before using. We also retest it before sending out.
3. The calibration is recommended, after 2 to 3 months if the testing has not be done too often, or when the accuracy is required.
4. Calibrate the tester with PH 6.86 buffer powder firstly, then the PH 4.01 or PH 9.18 ones. Should the sample to be tested be acidic, the tester can be calibrated with buffer powder of PH 4.01 and 6.86, while it's alkaline, PH 6.86 and 9.18 ones should be used for calibration. Calibration with these three types of buffer powder is recommended if the tester will be used to test the PH of acid and alkaline. The calibration for this device is computerized and not done manually with a screw driver, read the instruction in the manual or tips below.
5. Maintenance, should the device not be used for a long period, simply test it with the clean water every half month.
6. Testing instruction: sway the  device gently against the tested liquid while testing (this may take a while), after the reading is unchanged, then stop and take the reading. Do NOT press the CAL button if not to calibrate, this may cause error.
7. The pH of tested liquid should be within pH 0 to 14 and its tempreture also in 0 to 60 degree, otherwise the detection bulb may be broken if to test the liquid out of these ranges.
8. Images 3 to 7 were PH testing examples of the seller's fish pond. Never guess the PH, it will cost your fishes' lives. The PH meter in these images was our old type.

Calibration Tips (Seller's experiences, our products only)

1. Detector have to be immersed in the buffer liquid during the calibration, and stirred in the liquid for a while before the reading is unchanged. The detector should be rinsed with pure water before calibration with other buffer liquid.
2. There are two types of calibration programmed in the chips, most of them the calibration is done by simply press the CAL button, and the device will detect the buffer liquid automatically, 4.01, 6.86 or 9.18 flashing in the screen, then "END" indicated. If an error or "- - - -" appears you after you press CAL button (and hold), then you have to try to calibrate with other buffer liquid, such as 4.01 one, then go back the calibrate with error one. Some of the device you have to calibrate according to the manual.
3. Cautions: The calibration procedure is programmed, PH6.86 has to be done firstly after CAL button is pressed. Should there be any mistakes done during the procedure, do not repeat, but switch off, and do the calibration from the beginning. Should this not work, try the procedure above mentioned to settle the error. Should the batteries are flat (working but reading unclear), the calibration may not be done correctly (error occurs), replace the batteries for calibration.

Optional Purchase:

Spare LR44/AG13 button batteries (2 needed for this device) and addtional sachets of buffer powder are available to buy without extra shipping cost if needed. Please write your selection in "Note to seller" or send us message, otherwise it's default to our choice to send.

Please visit our selling list to buy any quantities of Buffer Powder, spare AG13/LR44 button batteries or other types of pH testing pens, "Add to cart" works for the different small items you purchase from us to be checked out in one order with no extra shipping cost.

This PH tester can be used to test PH for cold drink and juice, watered chemicals and pharmaceuticals, swimming pool and tap water, etc. Calibration should be done regularly while testing in the labs and accuracy required.