The TVF-R42GNMM is a TopWorx valve position switchbox with a tropicalised aluminium base and a clear resin lid. It is rated non-incendive.
Position sensing is by four SPDT reed switch modules. The switchbox has a standard 90° visual indicator showing green for open and red for closed, a NAMUR 316 stainless steel shaft, two M20 conduit entries and silicone O-rings.
