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SPA 1401/1402 Differential Pressure Switch Specification

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This document specifies the SPA 1401 and SPA 1402 differential pressure switches, used for monitoring non-inflammable and non-aggressive gases in applications such as filter dirty detection and fan run/stop monitoring. It details construction, adjustment ranges, electrical ratings, installation guidelines, and optional accessories like the fitting kit with PVC tubing and pitot tubes.

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