20BPG-100 (05703161): B-Series Pressure Murphygage Pulsation Dampeners They have a slotted sensitivity

They have a slotted sensitivity adjustment located on the side of the case (see drawing)

The standard threading size at the end of a temperature gauge capillary tube is 5/8-18 UNF (Union Nut)

The Murphy 0-5000 PSI Pressure Swichgage Instrument with Stainless Steel Bourdon Tube/Socket 45APE-S-5000 is a mechanical gage for pressure indication

The 20V-30 Vacuum Swichgage is commonly used to measure loading of spark ignition engines through intake manifold vacuum

Inside the A20DP-K-30

20BPG-100 (05703161): B-Series Pressure Murphygage Pulsation Dampeners They have a slotted sensitivityThe 20BPG 100 B Series Pressure Murphygage is a high quality, diaphragm actuated indicating gauge, with a pressure range of 0 100 psi. Built with the same heavy duty design as the standard 20 Series Swichgage instrument, the B gage is more compact and is the optimum instrument for gauge only applications. The 20BPG 100 has a high impact polycarbonate lens, a sturdy environmentally sealed steel case, and a polished, low profile stainless steel bezel.