This small dial gauge is used in corporate aviation aircraft for determination of oxygen cylinder (supply) pressure.  Illumination is by wash lighting of the front dial face.  Lighting type is incandescent Blue-White.  The PPP Pressure Gauges are also available with 5 volt lighting (P24065).  T1 size lamps (P28028) are replaceable by removing front bezel plate.  Pressure fitting is per 1/8 – 27 NPT.  Fittings available per AND10089-3 and may be connected directly to the PPP high pressure capillary lines part number P22012, P22013, and P22016 Series.  LED lighting and color band ranges are also available.