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Xiamen Fangcheng Electronic Science And Technology Co., Ltd. 

Good quality RO Water Purifier Membrane for sales
Good quality RO Water Purifier Membrane for sales
Item as described. which is excellent. works perfectly Thank you for the competitive pricing--I think it's the best value for me.

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Fit perfectly with our system. We've had our system for more the 20 yrs now and everyone should have a reverse osmosis system. They do exactly what th

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Auto Shut - Off Pen Type Digital PH Meter Water Tester With Big Screen

China Auto Shut - Off Pen Type Digital PH Meter Water Tester With Big Screen supplier
Auto Shut - Off Pen Type Digital PH Meter Water Tester With Big Screen supplier Auto Shut - Off Pen Type Digital PH Meter Water Tester With Big Screen supplier

Large Image :  Auto Shut - Off Pen Type Digital PH Meter Water Tester With Big Screen

Product Details:

Place of Origin: China
Brand Name: Fangcheng
Certification: CE, DESING PATENTS
Model Number: PH-009I

Payment & Shipping Terms:

Minimum Order Quantity: 100pcs
Price: Negotiable (according to your order quantity)
Packaging Details: 1pcs/leather case, 100pcs/carton
Delivery Time: 1-3 working days after payment
Payment Terms: L/C, T/T, Western Union, MoneyGram,
Supply Ability: 15000 Piece/Pieces per Month ph meter
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Detailed Product Description
Accuracy: ±2% Range: 0.0-14.0
Power: 3*1.5V(AG-13) Button Cell Battery Shut-off: Auto
Waterproof Grade: IP65 Certificates: CE And ROHS

Product Description


A pH meter is a handheld device that tests water for its level of acidity versus base or alkalinity. If water is equally acidic and alkaline, it registers as neutral on the meter. The pH meter utilizes a standard pH scale for measuring these aspects of water quality. The level of concentration of positive hydrogen ions in the water determines the result.

The acidic side of the pH scale runs from 0 to 6.9, with 7.0 being neutral. Because 7.0 is neutral, 6.8 is considered only slightly acidic. Similarly, 7.2 is only slightly alkaline, with the base scale running to 10.0 or higher. Generally speaking, acidic water is soft while alkaline or base water is hard.

Lacking a pH meter, water is pH-tested by adding chemical agents to a water sample. Depending on the agents used, a bright yellow result could indicate highly acidic water; blue, neutral; and deep brown, alkaline water. Hues are interpreted as positions along the scale.

Liquid pH tests can be messy and they do require some guesswork as to the reading. Conversely, a pH meter is a digital device with a connected glass electrode probe. The probe is placed into the water to be tested, and the pH of the water is digitally displayed. It takes mere seconds and is far more accurate, assuming the meter has been properly calibrated.


pH meters range from simple and inexpensive pen-like devices to complex and expensive laboratory instruments with computer interfaces and several inputs for indicator and temperature measurements to be entered to adjust for the variation in pH caused by temperature. The output can be digital or analog, and the devices can be battery-powered or rely on line power. Some versions use telemetry to connect the electrodes to the voltmeter display device.197–215

Specialty meters and probes are available for use in special applications, such as harsh environments and biological microenvironments.There are also holographic pH sensors, which allow pH measurement colorimetrically, making use of the variety of pH indicators that are available. Additionally, there are commercially available pH meters based on solid state electrodes, rather than conventional glass electrodes



Calibration and operation

The German Institute for Standardization publishes a standard for pH measurement using pH meters, DIN 19263. Very precise measurements necessitate that the pH meter is calibrated before each measurement. More typically calibration is performed once per day of operation. Calibration is needed because the glass electrode does not give reproducibleelectrostatic potentials over longer periods of time.238–239Consistent with principles of good laboratory practice, calibration is performed with at least two standard buffer solutionsthat span the range of pH values to be measured.
For general purposes, buffers at pH 4.00 and pH 10.00 are suitable. The pH meter has one calibration control to set the meter reading equal to the value of the first standard buffer and a second control to adjust the meter reading to the value of the second buffer. A third control allows the temperature to be set. Standard buffer sachets, available from a variety of suppliers, usually document the temperature dependence of the buffer control. More precise measurements sometimes require calibration at three different pH values.
Some pH meters provide built-in temperature-coefficient correction, with temperature thermocouples in the electrode probes. The calibration process correlates the voltage produced by the probe (approximately 0.06 volts per pH unit) with the pH scale. Good laboratory practice dictates that, after each measurement, the probes are rinsed with distilled water or deionized water to remove any traces of the solution being measured, blotted with a scientific wipe to absorb any remaining water, which could dilute the sample and thus alter the reading, and then immersed in a storage solution suitable for the particular probe type.


Technical Parameters


Measuring range

pH:0.01-14.00ph ph meter

Resolution pH:0.01pH TDS:1ppm
Accuracy ±0.1 pH
Automatic temperature compensation 0-80℃
Battery 3*1.5V(AG13 button cell)
Operating temperature 0-60℃
Calibration Automatic Calibration
Dimension 183*37*37mm
Weight 90g


Auto Shut - Off Pen Type Digital PH Meter Water Tester With Big ScreenAuto Shut - Off Pen Type Digital PH Meter Water Tester With Big Screen

Contact Details
Xiamen Fangcheng Electronic Science And Technology Co., Ltd. 

Contact Person: Carey Gao

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