Category Archives: Instrumentation

Instrumentation is the art and science of measurement and control of process variables within a production, laboratory, or manufacturing area. An instrument is a device that measures a physical quantity such as flow, temperature, level, distance, angle, or pressure. Instruments may be as simple as direct reading thermometer  or may be complex multi-variable process analyzers. Instruments are often part of a control system in refineries, factories, and vehicles.

Leakage detectioon system for cooling tower

If water enters an oxygen lance from a leak in the cooling system, the results can be  catastrophic. Why take the risk, when simple means exist to avoid it. Endress+Hauser’s highly accurate leakage detection system, designed to IEC 61511 and EN ISO 13849-1, detects the slightest signs of a leak, so that action can be… Read More »

how electro pneumatic positioner works ?

  The electro -pneumatic positioner is used in Control Valves with pneumatically operated actuators. The valve is operated by means of electrical controller or Control Systems With an control signal of 4 to 20 mA or split ranges of 4~12/ 12~20 mA. Electro-Pneumatic Positioner converts this control signal into a pneumatic output in proportion to the lift of… Read More »

Mechanical vibration switches

A much simpler alternative to continuous vibration sensors (displacement or acceleration) and monitoring equipment suitable for less critical applications is a simple mechanical switch actuated by a machine’s vibration. These switches cannot, of course, quantitatively analyze machine vibrations, but they do serve as qualitative indicators of gross vibration. The following photograph shows a Robertshaw “Vibraswitch” unit: This switch… Read More »