Alarm Systems for Light Liquid Separators

Water is an important medium essential to life and a valuable resource, which must be protected from pollution. An essential role in this objective is the protection of ground water and waste water systems from
contamination bymineral oils. In automobile repair workshops and inmany industrial processes oil and gasoline separators prevent the uncontrolled contamination of the environment by harmful substances, which would lead to impairment of the natural hydrological cycle. The requirements for such protection systems are set out in the European standard EN858-1:2002. In sub-section 6.5.4 of that document it is stated that separator systems must be fitted with self-acting warning devices.
Pepperl+Fuchs (Germany) offers various SET solutions for these requirements.
The alarm systems in the series LAL-SRW have a mains connection and provide an optical and acoustic alarm before the maximum reservoir quantity (oil layer thickness) is reached on overflow or excessive sludge level in the separator. These alarmsystems are complete systems comprising the following components: Probes, control unit, housing and mounting kit. The control unit is compact and can be built into the wall box provided or in any control cabinet with DIN mounting rails. Depending on the application, there are three types of alarm systems:
- LAL-SRW-01 Complete set for monitoring the oil layer thickness / reservoir level
- LAL-SRW-08 Complete set for overflow monitoring
- LAL-SRW-18 Complete set for reservoir/oil layer thickness and overflow monitoring

A sludge level sensor is optionally available, which triggers an alarm when a maximum level is reached. The alarm systems in the series LAL-GSM can be supplied to suit various voltage requirements and also with battery operation for areas in which there is no existing mains supply. In this case the alarm is transmitted wirelessly by means of an SMS communication.
These systems can be equipped with sensors for overflow, reservoir level (oil layer) or sludge level and are supplied as ready to mount kits with all the requisite mounting components.
The system provides reliable remote monitoring round-the-clock and is therefore also suitable for use in areas that are not continuously manned. On the detection of an alarm condition a textmessage is generated and transferred via the integrated GSM modem by SMS to up to three mobile telephones. In addition, weekly status reports per SMS provide a complete overview of the status of oil and gasoline separators.