Flow Calibration

The E+E accredited calibration bench is unique in Europe and offers flow and volumetric flow calibrations for inline and immersion flow meters at standard conditions in the range from 0.6 to 2300 m³/h (0.35 to 1354 SCFM) in pipes from DN15 to DN80 (1/2 to 3“). The pressure in the calibration bench can be set between 1 and 10 bar (14.5 and 145 psi), which allows for highly accurate calibration under the real conditions in compressed air networks.

The E+E calibration laboratory operates also an accredited low flow calibration bench in the range from 0.06 l/min to 245 l/min at standard conditions. Calibrations can be performed in pipes from DN15 to DN50, at pressures between 1 and 10 bar (14.5 and 145 psi) and for air and non-air gases.

Scope of Accreditation E+E Calibration Laboratory

Calibration Calibration object Measurement conditions Measurement range Calibration uncertainty
AA 0608 Lab Flow sensor/
Flow transmitter
0.1...1 MPa (1...10 bar)
at (23 ±3) °C
Flow rate at standard conditions (0 °C / 1013 mbar)
0.6...2300 m3/h
0.003 m3/h + 0.9 % of m.v.
AA 0608 Lab Flow sensor/
Flow transmitter
0.1...1 MPa (1...10 bar)
at (23 ±3) °C
0.06...245 l/min 1) 0.12*Q0^2-0.48*Q0+1.66 (for range: 0.06...2.7 l/min)
0.008*Q0^2-0.14*Q0+1.86 (for range: 1.9...9.3 l/min)
0.0007*Q0^2-0.052*Q0+2.4 (for range: 9...46 l/min)
0.00004*Q0^2-0.0018*Q0+1.8 (for range: 45...245 l/min)

1) also for non-air gases

Calibration Procedure

For the calibration of air velocities of 0.04 m/s to 2 m/s, a vertical wind tunnel is used with an Eiffel design (open circuit). The measurement path with a closed design is square, with a side length of 25 cm and produces a very homogeneous low-turbulence flow profile.

For the calibration of air velocities of 0.3 m/s to 40 m/s, a horizontal wind tunnel is used with an Göttinger design (closed circuit). The measurement path is round, with a diameter of 25 cm and produces a very homogeneous low-turbulence free steel profile.

The temperature in the wind tunnel can be regulated via a heat exchanger in the measurement volume in a temperature range of 5 °C to 80 °C.

A Laser Doppler Anemometer (LDA) is used as a reference for the measurement of the flow velocity.

Inquire Calibration

Accompanying Slip

For efficient processing of your calibration order, please also send us a fully completed accompanying slip with the measuring device to be checked. 

Download here  >>

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