Best Measurement
Instrument or Gauge Capability Expressed as an
Expanded Uncertainty (k=2)
Gas pressure (absolute)
Calibration of pressure
indicating instruments and gauges
500 Pa to 135 kPa
135 kPa to 7.1 MPa
0.0085% + 5 Pa
0.007% + 2.5 Pa
Gas pressure (gauge)
Calibration of pressure indicating
instruments and gauges
“Pressure equivalent”
Calibration of dead weight testers
(pressure balance supplied with
associated mass set)
-100 kPa to 0 0 to 20 Pa
20 Pa to 16 kPa
16 kPa to 350 kPa
350 kPa to 7 MPa
0.012% + 3 Pa
0.3 Pa
0.02% + 0.13 Pa
0.0085% + 3.5 Pa
0.0075% + 0.3 Pa
Hydraulic pressure (gauge)
Calibration of pressure indicating
instruments and gauges
600 kPa to 70 MPa
0.0075% + 10 Pa
Hydraulic pressure (absolute)
Calibration of pressure indicating
instruments and gauges
