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Six Gas Detector Calibration in the Wastewater Industry

Greg Shires

Issues & Solutions for Calibrating a Six Gas Detector in the Wastewater Industry

Continuing improvements in workplace safety and the ongoing protection of workers within Industry is creating a new wave in the water/wastewater sector. Many organizations are moving towards measuring six (6) gases in sewage treatment and sewer lines throughout Australia.

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Topics: Gas Theory for Gas Detection Applications, Calibration Gases

Determining Accuracy of a Calibration Gas Mixture

Paul Fry

In this article we will go over the different terms as they relate to the overall accuracy of a gas mixture.

Firstly, understand that “accuracy” is a general term which is actually made up of two components: Preparation Tolerance and Measurement Uncertainty

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Topics: Gas Mixtures, Calibration Gases, Regulations and Standards

Choosing your Gas Cylinder Size: The 112 Litre Solution

Greg Shires

For much of the past 25 years little had changed in the availability and selection of calibration gas cylinders/mixtures for gas detection applications. Manufacturers were happy to enjoy the profits of selling 58 litre cylinders for standard 4 gas (H2S/CO/CH4/O2) mixtures and single corrosive gas mixtures.

It was not until 2008 when CAC GAS & Instrumentation in partnership with Scientific and Technical Gases (UK) introduced a unique and customer-focused solution. The 112DA Cylinder.

This was the first disposable gas cylinder pressurize to 70 bar (1000psi) for use with gas detection instruments.  Prior to this, gas cylinders were pressurized to only 35 bar or less.   

This increased pressure provided the opportunity to double the gas volume in the same size cylinder giving customers, for the first time 112 litres of gas, in the same size cylinder as the 58 litre.  

The benefits were quickly realised and it became known as the 112 Litre Solution!

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Topics: Calibration Gas Selection, Calibration Gases

Chlorine Gas Calibration - Challenges for Gas Detection Instruments

Greg Shires

The process of gas calibration involves the testing and comparison of your gas detection instruments against some fixed reference value. The process includes using an accurate gas mixture as a reference and comparing it with the values provided by the instrument being tested. The cylinder mixture or device that produces the assigned correct value is known as the standard and it plays a vital role in all gas calibration.

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Topics: Gas Theory for Gas Detection Applications, Calibration Gas Selection, Gas Mixtures, Calibration Gases