S.S COMPOUND PRESSURE GAUGES, 4” DIA DIAL (GLYCERIN FILLED OR PREFERABLY AN INTERNAL DAMPING MECHANISM FOR VIBRATIONS OF NEEDLE), WITH DUAL GRADUATIONS IN BAR AND PSI, PRESSURE RANGES FROM -2~+9 BAR, CONNECTION TYPE 3/4” DIA FNPT BOTTOM, GAUGES SHOULD BE CALIBRATED FROM A CERTIFIED THIRD PARTY, CALIBRATION SERVICES PROVIDE ALONG WITH CERTIFICATES AND GAUGES SEALED,
ACCURACY OF PRESSURE GAUGE SHOULD BE GRADE 2A AS PER ASME B40,