low cost ph meter/skin ph meter/ soil ph meter price

Specification:

*Measuring pH Range: 0.0 - 14.0 pH
*Resolution: 0.1 pH or 0.01pH
*Accuracy: ±0.1 pH (at 20°C/68°F), ±0.2 pH
*Operating Temperature: 0 - 50°C (32 - 122°F)
*Relative Humidity: <95%
*Life: Approx.700 hours of use
*Size: 152mm x 30mm x 15mm (5.9x1.2x0.6")
*Trimming: By potentiometer
*Battery: 3*1.5v (AG-13 button battery) (included)
*Net Weight: Approx. 51g

PH Meter Battery Replacement:

When the meter cannot be switched on or the display fades, pull out the battery compartment and replace all three 1.5V batteries, while paying attention to their polarity. Batteries should only be replaced in a safe area using the above-mentioned battery type.

What is a PH?

A pH Meter is one of the most widely used pieces of laboratory equipment. It is used to measure the pH of a substance.

Substances can be alkaline or acid. Acid substances have a low pH Number whilst alkaline substances have a high pH Number. The pH scale goes from pH0 to pH14 with pH7 being a neutral pH; pure water has a pH of 7.

What is PH meter?

PH meter is an electronic device used for measuring the PH (acidity or alkalinity) of a liquid .A typical PH meter consists of a special measuring probe (a glass electrode) connected to an electronic meter that measures and displays the PH reading.

The pH meter for users that require the greatest accuracy and features while staying economical.This model has BEPS as well as user selectable automatic shut-off, replacable pH electrode cartridge, stability indicator and automatic calibration.
Features:
1.Brand New and High Quality.
2.Excellent meter, very accurate and durable.
3.With protective plastic case and calibration screwdriver.
4.An ideal instrument for aquarium, fishing industry, swimming pool, school laboratory, food & beverage etc.

In addition, you must calibrate this tester whenever the following happens: If the tester was used or lay aside long time; recalibrate it It was used too often; recalibrate it
Need High Accuracy. recalibrate it
Note: You will Need calibrate after you get it.

PH Calibration:
For very precise work the pH meter should be calibrated before each measurement. For normal use calibration should be performed at the beginning of each day. The reason for this is that the glass electrode does not give a reproducible e.m.f. over longer periods of time. Calibration should be performed with at least two standard buffer solutions that span the range of pH values to be measured. For general purposes buffers at pH 4.01 and pH 9.18 are acceptable. 
1.Immerse the electrode in PH 6.86 (under the temperature of 25℃)standard buffer solution of phosphate and gently shake the electrode.
2.After about one minute, regulate the trimmer with a screwdriver until the buffer solution value corresponding to the measurement.
3.Immerse the electrode in PH 4.01 or PH 9.18( the standard buffer solution)
4.After about one minute, regulate the trimmer with a screwdriver until the buffer solution value corresponding to the measurement.