Draeger has added another two chips to its Chip Measurement System (CMS) range, according to the company.
Ideal for use in offshore environments to provide accurate, reliable spot measurements, these new chips enable this portable gas and vapour monitoring unit to measure hydrogen sulphide and ammonia.
Requiring minimal user training, the CMS is quick and easy to use. When plugged-in to the CMS analyser, which measures and evaluates the concentration, the chips provide an immediate, true digital readout without the need for further evaluation, the UK-based company says.
Low concentrations of hydrogen sulphide can be found on drilling rigs, in oil and gas transference and in shutdown processes.
In addition to the obvious need to monitor ammonia during transportation by tanker ships, it is often found in aqueous solutions used to clean storage vessels.
Both of these new chips will measure concentrations up to 0.2 to 5ppm.
Combining intelligent operation with straightforward user instructions, the CMS features a backlit, multilingual LCD display and a menu-driven user interface. Supplied pre-configured for automatic operation, the analyser performs a selfcheck on system start up and, as soon as the chip is inserted, carries out a chip integrity test.
Incorporating a mass-flow regulated pump, the CMS measures the movement of concentration in relation to time, regardless of fluctuations in atmospheric pressure.
This constant mass flow capability, together with the sensitivity of the reagent system, enables fast, extremely accurate measurements to be made, according to the company.
Once measured, the result is displayed as a concentration on the digital display. In addition, before carrying out a measurement, the system allows the user to select the way in which data is stored.
A tone signal sounds at the end of each measurement cycle and, at this stage, another measurement can be made or another chip selected.
A wide variety of chips are available for different applications. Each chip carries a bar code which, when decoded by the analyser, provides the parameters for the measurement evaluation such as the gas type and measurement range. Able to carry out 10 separate measurements, the chips also have a two year lifespan.
For those applications where liquids may be present, a special float probe can also be supplied. Protected against dust and spray water in accordance with IP54, the CMS is intrinsically safe and resistant to electromagnetic radiation, Draeger says.
It also carries Cenelec (Europe), UL (USA) and CSA (Canada) certification approval.
