• Protecting expensive process control equipment from power surges

    Requirement  A number of ventilation fans were to be installed at a major airport in the Netherlands and monitored by a PLC based system. The fans chosen had a normal running current of 25-30A so the system designers chose clamp on intelligent current transducers rated to produce a 0-20mA output for a 0-50A input. These […]

  • Emmisions monitoring and control

    Requirements Pollution monitoring and emission control A requirement to measure the output from furnaces to ensure they comply with environmental health regulations. A company involved in disposing of animal carcasses after the foot and mouth outbreak, needed to monitor the temperature along with the level of carbon monoxide and oxygen in the furnaces. An additional requirement to […]