Digital PH Tester

Digital pH tester pH-220 feature:small size ,portable;built-in battery,suitable for outdoor test;high accuracy,quick response,result accurate and reliable.
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Product Details


1.What is pH?

A pH (potential of Hydrogen) measurement reveals if a solution is acidic or alkaline (also base or basic). If the solution has an equal amount of acidic and alkaline molecules, the pH is considered neutral. Very soft water is commonly acidic, while very hard water is commonly alkaline, though unusual circumstances can result in exceptions. The pH scale is logarithmic and runs from 0.0 to 14.0 with 7.0 being neutral. Readings less than 7.0 indicate acidic solutions, while higher readings indicate alkaline or base solutions. Some extreme substances can score lower than 0 or greater than 14, but most fall within the scale.

2.Does my pH electrode have to be wet?

All glass electrodes have a bulb which must be kept hydrated and a reference junction which must be kept wet to prevent excess leakage of the internal electrolyte solution from the reference junction.

3.What should I store my pH electrode in?

Ideally, storage solution has the same chemical make-up of what is in the electrode itself, but if that is not available use buffer 4 or 7 solution. NEVER STORE IN PURE (DISTILLED) WATER!!! In the case of electrodes that are continuously immersed, storage is not an issue since they are constantly wet.


Technical data:

Model No.

Pen type pH/Temp digital pH tester pH-220

Test range

pH:0.01-14.00 pH, Temp: 0-50℃,32-122F


pH:0.01pH,Temp:0.1 ℃, 1 F


pH:0.01pH , Temp:0.1℃,1F

pH Calibration

25℃ 3 points: 4.01  6.86 9.18

Working temperature



1.5Vx4 battery





Our company:




Our service:





1.Are you trading company or manufacturer ?

We are factory.

2.What is the lead time for products order?

usually, if small order, 2-3days after getting payment;if big order, it needs 10-20days after payment, it depends upon your quantity.

3.What’s the MOQ ?

Usually speaking, we do not set MOQ since we want to do business with any business type, including retailer and wholesale.

4.What’s the lead-time ?

Normally it takes 3-5 working days after receiving payment.

5.What is your terms of payment ?

Payment 100%  T/T, Western Union, L/C, Credit Card ect. in advance ,before shippment.


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