Most monitors today offer considerably more common features, such as a display of real-time monitoring data of all installed sensors, powerful audible alarms complemented by vibrating and visual alarms, and internal or external sampling pumps that draw samples to the monitor.

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Over the last 200 years, the act of monitoring a worker’s environment for explosive and toxic gases as well as for oxygen enrichment or deficiency has seen tremendous change. Gas detection instrumentation has been a part of that evolution. As technology advanced and electronics were introduced to the world of gas detection, single and multi-gas monitors evolved.

 The first electronic single gas monitors were basic at best. Designed for the coal industry to sniff out methane, these monitors utilised analogue readouts to indicate the presence of gas.