SMC G36-L/G46-L/G53-L/G63-L, Pressure Gauge w/Limit Indicator, Color Zone Type G36-P10-01-L-X30

With the color zone limit indicator, users can set up the gauge for quick, "at a glance" indication of the appropriate operating pressure.  Adjustable red rings indicate low or excessive pressure while a needle in the green zone indicates appropriate pressure for the operation.  Pressure ranges vary from 0 to 1 MPa.