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Sampling systems for gas measurement in wastewater applications.

Greg Shires

Water/wastewater organizations have for many years struggled with measuring gases and vapours in sewers over long periods of time.  

The physical nature of the application creates high levels of corrosive gases, heat, water and high humidity which negatively impact all sensors including catalytic, electrochemical and photo ionisation.

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Topics: Material Selection, Gas Detection

Gas Distribution Systems for Non-Docking Station Applications

Greg Shires

The GDS-100 Gas Distribution System was originally designed to provide an efficient method of utilizing high pressure/large volume gas mixtures with gas detection docking stations.

Although excellent for this application the GDS-100 has also proven to be a beneficial stand-alone system for both calibration and bump testing applications.

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Topics: Material Selection

Calibrating Process Analysers with the On-Demand Flow Regulator.

Greg Shires

The ODFR-1001 is an On-Demand Flow Regulator providing flows between 0.3 – 3 litres/min. 

This regulator is ideal for calibrating or testing Process Analysers which have internal pumps to draw in the gas sample.

The regulator is available in a low pressure version for use with disposable gas cylinders up to 70 bar and a high pressure version for cylinders with pressure up to 300 bar. Both versions work identically. 

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Topics: Material Selection

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

Tapered Thread Fittings

Paul Fry

In order to deliver gases from a cylinder to the point of use, a gas delivery system is used. This can be as simple as a single cylinder regulator or a complex system involving a manifold, pipelines, line regulators, outlet points, or a long list of many other components.

However your system is designed, there will be many gas-tight connections. In this article, we’ll focus on one type of fitting: tapered thread fittings.

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Topics: Material Selection

Guide to Selecting High Pressure Specialty Gas Regulators

Greg Shires

Step: 1:  Pressure or Flow

Do you require a pressure regulator or a flow regulator?

All high-pressure regulators are designed to accept incoming pressure of 150bar+ from the cylinder.    This makes them a high-pressure regulator. But what do you require on the outlet of the regulator.   What does your instrument/analyser/GC require?  Pressure or flow?

Typically, a gas detection instrument will require flow (0.5l/min) where a gas analyser may require pressure at 1 or 2 bar. The instrument, analyser or GC will dictate what is required.

Once this is determined then we can continue.

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Topics: Material Selection

Choosing Laboratory Gas Generators - How to Decide?

Bruce Peat, Peak Scientific
  When it comes to deciding which   gas generator   is best for your lab there are some considerations lab managers must make. There are two main technologies used to generate nitrogen from air: membrane and   Pressure Swing Adsorption   (PSA).  
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Topics: Material Selection, Laboratory Gas Analysis

Gas Detection Response Testing in Coal Mining

Greg Shires

When using hand held gas detection instruments in underground in coal mines, a crucial step is the testing of each gas detection instruments prior to use.

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Topics: Material Selection, Gas Detection