Crowcon Detection Instruments Ltd products

The single point system is designed to monitor gas samples from pipelines or processes. A powerful high-flow pump extracts and transports gas samples to the system where they are conditioned to remove dust and moisture. The conditioned sample gas is then passed across one and four gas sensors before being either exhausted to atmosphere or returned to the supply pipe/process. System integrity is maintained at all times using flow-fail monitoring devices, sample line flame arrestors and an internal flammable gas detector which shuts the system down in the event of a gas leak within the system cabinet. The system is controlled by a programmable timer which sequences sample and purge/drain cycles. The current operating mode is clearly displayed and sample/ purge times are fully adjustable.

The multi-point system uses the same sampling arrangement as the single point system, but can monitor up to 16 separate sample lines on a sequential basis. The multi-point system provides a cost effective and low maintenance solution for monitoring gas hazards in buildings, pumping stations, storage areas etc. Each sample line is monitored for one minute on a sequential basis, and the samples
are passed across one to four gas sensors. Filters, flow-fail devices, internal gas leak detectors and flame arrestors are fitted to ensure safe and reliable operation at all times. Sample and purge times are fully adjustable, and a specific sample line can be selected and held at any time using buttons mounted on the front panel.

Designed for use in Zone 1 or Zone 2 hazardous areas, the air aspirated system uses a compressed air driven vacuum generator to draw a gas sample from a single point. Explosion- proof gas detectors are fitted to monitor for flammable gases, toxic gases or oxygen. Each detector provides a 4-20mA output. An intrinsically safe flow-fail device warns if the sample flow is lost due to supply air failure or sample line blockage. The system is ideally suited for monitoring flammable gas leaks within turbine enclosures, solvent detection in painting or printing processes or monitoring oxygen levels in industrial processes.

The Mill-Gard CO detection system provides early warning of a fire within coal pulversizers and silo’s. Designed specifically for use in coal-fired power stations, the system uses powerful pumps to extract air samples from the coal mill via hardened sample probes. The air samples are conditioned and passed over industrial grade C.O. (carbon monoxide) sensors to quickly detect an increase in C.O. gas levels. Any increase in C.O. levels provides an early indication of the onset of fire.