Caledonian Control Technology Ltd.

Caledonian Control Technology have a well earned and long established reputation for the design and manufacture of safety control products, all developed to a robust specification and a high level of reliability.

Our range of gas interlock, proving and kitchen safety controls, combined with their associated precision sensors, continue in the same tradition by offering Advantica test certification to comply with BS6173. Additionally we offer full compliance with the HVCA's DW172 specification and GSIUR 27(4).

Our ISO9001 accreditation clearly states our commitment to quality and accountability in the design and manufacture of these, and indeed, all our products.

Product Name The Caledonian Cater-Safe Solution Product Description Our updated solution revolves around our BS6173 certified interlock controls, the EMX50, EMX20 and EMX10. They have been fully certified to comply with the BS6173 standard by Germanischer Lloyd (formerly Advantica), an independent NAMAS laboratory. The EMX50 requires an input signal from each fan. This may be from a standard differential pressure switch, in the most basic and most economic form. Alternatively an electronic version can be employed, as in our EPS10, depending upon the amount of differential air pressure available from the fan. Additionally, if preferred, an indirect method of air flow detection may be used, for example our motor current sensors, the ECS10 and ECS10E. Whilst not our preferred method, our tests have shown that both the ECS10 and the ECS10E can be used reliably and in complete safety. All our sensors employ the internationally accepted ‘safe start’ procedure. The choice of sensor can make a considerable difference to the cost of a system and depends on the specific application. If there is enough air pressure difference, at least 0.3 mbar (33 Pa), then a low cost mechanical diaphragm switch can be used. Where appropriate, we can measure for pressure drop and advise on the installation of a suitable set of sensors. In all cases it is important that the volumetric flow is tested and NOT the static pressure. In installations where gas burning equipment without flame failure operate, our gas leakage GLT10 control must be fitted to comply with BS6173. This would operate after the fan interlock had passed start up, to check if for example an unprotected gas tap has been left open. In this instance, the gas valve would be held shut until the gas tap is closed and the installation re-tested and verified as gas-tight. PDF Click for file Categories Health & Safety Ventilation

Health & Safety | Ventilation