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Samson Controls
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The Series 3730 electro-pneumatic control-valve positioner with Profibus-PA (photo) provides high-quality air output capacity combined with optimum functionality and ease of operation. The 3730 is one of a range of positioners from this firm, all of which are based on a common model platform. The Type 3720-2 and all higher versions come with the fully integrated Expert valve diagnostics that supply the required information for predictive maintenance. Alarms are indicated via the fault indication output and displayed as error codes. — Samson Controls Ltd., London, U.K.