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CyberTech PHTester PH-107 Digital pH Meter Tester by CyberTech. $14.99. This digital pen style pH meter is an ideal instrument for any aquarium, the fishing industry, swimming pools, school laboratories, food & beverage etc. Please be sure to calibrate with buffer solution before use. Calibration: -- Immerse the tester up to the maximum immersion level in the PH 6.86 buffer solution. (Package Includes 2 pack of PH substance which makes 250 ml buffer solutions, PH 4 and PH ...

pH and Buffers: In this video Paul Andersen explains how buffer solutions maintain pH in a solution. A buffer solution is made up of a weak acid and its conjugate base. As strong acids or bases are added the pH remains stable. A good buffer solution has a pKa value equivalent to the pH and equal amounts of the weak acid and the conjugate base.

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from Xpert Omatic

pH Meter Buffer Solution Powder Set for Precise pH Meter Calibration, Calibration Solution, Easy, Portable, Make 250 ml of Each 4.00, 6.86 and 9.18 pH Solution, 3 Count

Buffers is a scientific tool for designing buffer solutions for pH control. Buffers is useful both as a handy reference of available buffering agents and as an accurate, portable buffer calculator for chemical, biochemical and biological research.

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from NISupply

10.00pH Meter Calibration Buffer Solution - 10.00 pH 4oz (4 ounces)/120ml Bottle

Item Meter Calibration Buffer Solution - Bottle ORDER AS MANY AS YOU NEED! We carry other pH Buffers too! Product Specs:* 125 ml

from About.com Education

How to Make a Phosphate Buffer Solution

How to Make a Phosphate Buffer Solution: Phosphoric acid is also known as orthophosphoric acid or phosphoric(V) acid.