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CAC GAS Cylinder Recycling & Refilling Solution.

Greg Shires

Calibration & specialty gas mixtures are stored in two main cylinder types.  

  • Low pressure cylinders known as disposable or non-refillable cylinders (NRC)
  • High pressure / large volume refillable cylinders.
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Topics: Material Selection, Calibration Gas Selection

Hydrogen Safety in the Laboratory

Bruce Peat, Peak Scientific

Original blog written by Bruce Peat, Peak Scientific. Posted 02/03/16: http://www.peakscientific.com/blog/h2-safety/

The scientific community in China has been shocked by an accident in a laboratory at the prestigious Tsinghua University in Beijing, where it is believed that an explosion, and resulting fire, from bulk supplied hydrogen gas being used in the lab caused the death of a post doctorate researcher. 

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Topics: Calibration Gas Selection, Laboratory Gas Analysis

Q & A: on Calibration & Bump/Response Testing of Gas Detection Instruments

Greg Shires

A question and answer session with Greg Shires, Managing Director of CAC GAS & Instrumentation.

First let me by clear on this subject: Gas detection instruments are life saving devices.  

They can make the difference between a worker going home at night or not. If I was required to use a gas detection instrument in my work place each day I would make sure it was calibrated weekly and bump tested prior to every use. This would make sure it was accurate and I was safe.

So, let’s discuss this further.

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Topics: Calibration Gas Selection, Gas Detection

Mixing or Diluting Gases for Multipoint Calibrations

Carine Cardella, AlyTech

Designed and produced by AlyTech and distributed by CAC Gas & Instrumentation, GasMix™ products enable multipoint gas calibrations by mixing and/or diluting several calibration gases.

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Topics: Calibration Gas Selection, Laboratory Gas Analysis, Environmental Gas Measurement

General Rules for Designing Custom Gas Mixtures

Paul Fry

We are often asked for many different gases for the same applications. When possible, the required gases can be combined into the same cylinder to reduce the overall gas cost. When creating custom gas mixtures you must be aware of potential issues from mixing different compounds together.

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Topics: Gas Theory and Applications, Calibration Gas Selection

Issues with Liquefied Calibration Gas Mixtures

Paul Fry

Liquefied gas mixtures, or ‘liquid mixtures,’ are often used for calibrations where the application demands calibration with a ‘heavy’ or longer-chain hydrocarbon (see demystifying-hydrocarbon-gas-mixtures-in-non-refillable-cylinders). Liquid mixtures have the advantage of closely matching the product being analysed (e.g. stream gas), while also offering increased efficiency by allowing an increased number of calibrations with the same cylinder, when compared to a gaseous mixture.

While liquid mixtures do have significant advantages, there are some disadvantages to consider.

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Topics: Gas Theory and Applications, Calibration Gas Selection

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 and Applications, Calibration Gas Selection, Gas Detection

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