Externally mounted temp sensor - linked to fluidic logic unit for set point control

摘要

A temperature sensor suitable for external mounting on a pipe or vessel branch utilising the expansion of encapsulated CH3Cl or CCL2F2 to activate a bellows unit with attached pressure plate. Movement of the plate varies the gap between plate and nozzle of fluidic system and produces proportionate pressure changes in the signal line which can be used to indicate or control temperature. Multiplate nozzle bank can produce multiple signals which can be fed to logic units to give set point temp. control of fluid in a machine or process plant e.g. in chemical or nuclear inds.