Which pH buffer solution should I use first when calibrating?

pH Buffer solutions are required to calibrate a pH controller with a pH sensor (probe). The 3 most common pH buffer solutions are pH4, pH7 and pH10, and are usually a different colour to clearly distinguish between them. pH 4 is often red, pH7 green and pH10 blue. It is recommended to write the pH…

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Why is it important to discard the pH buffer solution after calibration?

There are typically 2 types of pH calibration methods, i.e. Single Point or 2 (Dual) Point. Single point calibration Single point calibration is usually done with the pH probe in the process water and the user calibrates the instrument to force the controller to read the same as the user’s independent test results. However, this…

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How to Store and Use pH Buffer Solutions for Calibrating pH

  pH Buffer solutions are required to calibrate a pH controller with a pH sensor (probe). The 3 most common pH buffer solutions are pH4, pH7 and pH10, and are usually a different colour to clearly distinguish between them. pH 4 is often red, pH7 green and pH10 blue. It is recommended to write the…

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What is ORP (Oxidation Reduction Potential) and mV?

When you want to disinfect water with oxidants such as ozone, bromine, or chlorine, ORP can be used as a method to determine how effective the disinfection is. Different applications will require different ORP (mV) levels. This article will attempt to explain. ORP stands for oxidation reduction potential. An ORP sensor (or probe) measures the…

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Why ASTM Coupon Racks?

A Corrosion Coupon Rack is an assembly of pipework that houses 1 or more metal coupons suspended in the water flow through the pipework of the coupon rack. The  coupons are basically a piece of metal that are accurately weighed before being inserted into the rack. When they are removed after a period of time,…

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What temperature will I be dosing into?

This is blog is the final part of our 4 part blog series: ‘Which EMEC Solenoid Metering Pump should I use?’ If you’d like to catch up on the past four blogs, we’ve included links for you at the bottom of this blog. In the mean time, this blog covers temperature, the temperature you will…

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Why is it important to specify what chemical I am dosing.

Not all chemicals are compatible with all chemically resistant materials. For this reason, all metering pumps have differnet options when it comes to specifying the material selection for the Liquid End. (The liquid end refers to the pump head, foot valve, injection valve and tubing, i.e. all materials which come into direct contact with this…

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