Dwyer Instruments’Series SSL gauges have dual English/metric scales with 1 percentfull-scale accuracy.  The Series SSL is a four-inch,glycerin-filled gauge, designed with a 304 stainless steel housing and316L stainless steel wetted parts for strong chemical compatibility.Gauges come standard with a 1 1/2″ Tri-Clover process connection foreasy installation with a tri-clamp fitting.  A wide selection ofranges are available from full vacuum, compound to 300 PSI (2 MPa).