Measuring technology for flow rate, mass flow rate and flow velocity

Put us to the test!

30.09.2014 15:09

AVP (Atmospheric volume flow rate test bench) in Höntzsch calibration lab

Achieving DAkkS accreditation for flow velocities last year was just the start of our plans to successively expand our calibration facilities with customer interests in mind. Höntzsch autonomously planned and managed the installation of the AVP project, thus generating a "tailor-made" solution in record time.

On completion, this new test bench for calibrating atmospheric volume flow rates will cover an atmospheric calibration range of 1.5 … 8000 m³/h with an accuracy of UAVP in the range 0.30 – 0.35 % based on the measured value. At the moment, the range is limited to 5000 m³/h due to the blower in use. Together with high-precision calibrated pressure and temperature sensors, two DN 300 type G 2500 turbine flow meters are the core of this facility and consequently serve as references. Each of these has a measuring range of 200 … 4000 m³/h and their measurement uncertainty of 0.25 % can be traced directly to the PTB (Federal Institute of Technical Physics) by using our in-house PTB-calibrated turbine flowmeter transfer standard.

For the range 1.5 … 200 m³/h, we use a G 160 twin-lobe rotary displacement meter with nominal diameter DN 80 and a PTB-certified measurement uncertainty of 0.14 %.  


Thanks to this new AVP test bench facility, we can calibrate your orifice plates, nozzles and Venturi tubes, as described in EN ISO 5167, as well as other devices such as gas turbine and ultrasonic flow meters according to the PTB Testing Instructions, Volume 29 (Measuring Instruments for Gas). Of course, our own volume flow measuring equipment such as the ExactFlow II are adjusted and calibrated on this test stand.


The implementation of the AVP is proof of our commitment to keep up-to-date with the latest developments in measuring technology, providing our customers with an even higher degree of accuracy and greater flexibility in the field of atmospheric calibrations. 


The process for DAkkS accreditation for this facility has already been initiated, thus further extending the Höntzsch range of accredited measured variables.



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