Applications & Industries

Measuring airflow in sterilising tunnels in the pharma industry

Measuring airflow in pharmaceutical filling lines and sterilising tunnels


Gas displacement / recovery gas / gasoline recovery

Measuring gas flow when decanting gasoline and filling bitumen (gas displacement)


Air mass flow measurement of the intake air of combustion engines

Air mass flow measurement on engine test benches on the inlet and outlet side


Measuring standard flow rate in compressed air pipes

Energy management DIN EN ISO 50001/ measurement of compressed air consumption


Monitoring flow rate towards gas lights in municipal street lighting


Measuring gas flow rate in gas pressure throttling stations for gas lights


Sludge aeration air in sewage plants

Measuring sludge aeration air in sewage plants


Technical ventilation of rooms / monitoring ventilation systems for ex applications or for rooms with hazardous materials

Measurements of air exchange in forced-ventilated rooms (battery production, mining, tunnels, laboratory, computer and clean rooms…)


Flow measurement in flowing waters (e.g. fish passes)

Flow velocity measurement in flowing waters such as streams and rivers


Measuring flow in quenching basins

Flow measurement in oil-hardening baths / quenching basins


Measuring flow velocity in (swimming) pools

Measuring efficiency and safety of counter current systems and filter pumps


Flow measurement in coating facilities

Airflow in a coating booth and at its outlet


Flow measurement of blast furnace gas in the steelworks


Long-term measurement of blast furnace gas, coke oven gas and converter gas in the production process during iron production


Thermal post-combustion after chemical installations

Measuring process exhaust air, supply air and burner gas at thermal post-combustion installations for waste air purification


Measuring laminar flow

Laminar flow in paint booths, clean rooms, semiconductor production or filling processes


Gas ejection blowers in natural gas pipelines

Measuring flow rate at gas ejection blowers in natural gas pipelines


Leakage measurement at large ball valves in gas pipelines

Isolation valves in gas supply have to be checked regularly on site for leakages


Sewage gas / biogas quantity measurement in wastewater treatment

Measuring flow rate at the digestion tower’s exit and in before the combined heat and power plant


Measuring landfill gas

Portable or fixed measuring of landfill gas in single wells or at the gas well’s collecting pipe leading to the combined heat and power plant


Measuring air exchange in engine rooms on ships

Monitoring ventilation on LNG ships (liquified-natural-gas ships)


Visualising rotational flow in gas flows

Rotational flow model for studies, teachings and in practice to visualise flow


Flow measurement in a brick factory when drying bricks

Measurements of exhaust air to regulate drying chambers in brick factories


Measuring gas flows in the building space of 3D printers

Flow condition in the 3D printer housing


Flow rate measurement at gas scrubbers

Measuring flow rate in polluted and aggressive exhaust gases at gas scrubbers or in moisture-saturated air after the gas scrubbers


Measuring exhaust air after hardening furnaces using rock wool as an example

Exhaust air measurement to increase energy efficiency in laden/hot exhaust gases


Measurement of ventilation in mine shafts using the example of landfill gas

Measurement of ventilation in mine shafts using the example of landfill gas





Höntzsch Measuring Technology: at home in many lines of business

Pharma Industry

The implementation of quality system guidelines according to Good Manufacturing Practice (GMP) ensures that safety, quality and effectiveness in all stages of production are guaranteed. Höntzsch sensors make a considerable contribution: be it in research, production, packaging or application testing of pharmaceutical products.

airflow in sterilising tunnels

Chemical Industry

Höntzsch instruments with ATEX and SIL certification guarantee plant safety, product quality and efficient energy use. They have proved successful in both fixed and portable applications in aggressive and explosive process gases, flare and waste gases.

Thermal post-combustion after chemical installations

Gas displacement / recovery gas / gasoline recovery

Cleanroom Technology

To ensure air quality in clean rooms, a laminar flow must be generated. This can only succeed, if the flow velocity is constantly controlled in a very small range. Thermal sensors TA10 with integrated shaft transducer are predestined for this type of application.  Vane wheel sensors ZS30 are the optimal solution for laminar flow in temperatures up to 350 °C.

Measuring laminar flow

Engine Test Bench Technology

Ever decreasing emission limit values and pressure to realise fuel saving potential, make accurate detection of all relevant parameters in test bench measuring necessary at all times. Höntzsch sensors deliver precise values with long-term stability when measuring the mass flow of engine intake air or exhaust gas.

Air mass flow measurement on engine test benches

Gas Utilities

Compressed air, natural gas and other gas mediums are expensive sources of energy. Considerable cost savings can be achieved by detecting and eliminating pipe leakages and performance control of compressors. Thermal flow sensors TA have no moving parts, are accurate, robust and maintenance-free. With their turndown ratio of 1 : 1000 flow rates from leakage flows to maximal withdrawal of gas can be measured reliably.

Gas ejection blowers in natural gas pipelines

measurement of compressed air consumption

Monitoring flow rate towards gas lights

Leakage measurement at large ball valves in gas pipelines

Water Management

Air supply in aeration basins is extremely cost-intensive. By optimising the compressor control, which relies on accurate flow rate measuring with Höntzsch TA or VA sensors, ample savings potential can be freed-up. For monitoring the amount of gas produced in the digestion tower, maintenance-free, explosion-proof vortex sensors VA are strongly recommended.

Sewage / biogas quantity measurement in wastewater treatment

Sludge aeration air in sewage plants

Landfill Technology

Explosion-proof thermal flow sensors TA have proved their worth in fixed and portable measuring of landfill gas amounts. These also reliably measure the ever-decreasing gas flow rate on completed landfill sites.

Measuring landfill gas

Nuclear Power Plants

Safety requirements in nuclear power plants have top priority. Höntzsch sensors in various measuring methods are used in monitoring numerous process controls. Measuring signals are indispensable for the evaluation assessment of operating conditions.

Biogas Generation

Höntzsch vortex sensors for explosive atmospheres (ATEX), which generate just a marginal pressure drop, are recommended for measuring the flow rate of biogas. The results are reliable, even if the flow rate is low, if the gas composition changes or if the gas is wet or charged with particles.


Vane wheel flow sensors TS are still able to deliver precise values under difficult oncoming flow conditions, even if the alignment to flow is not optimal. In wind tunnel or road tests the flow field can be determined extremely quickly even around complex structures. Through the ability to sense the +/- flow direction, reliable values are still possible even in backflow on motorcar radiators.

Traffic Tunnels, Mining Galleries, Waste Disposal Sites

Höntzsch TwinPipe vortex flow sensors with +/-directional sensing are highly suitable for measuring the flow velocity in traffic tunnels, mining galleries and waste disposal sites as well as for measuring in ventilation control.

Thanks to their high fatigue strength and long-term stability, these sensors are reliable and precise, even in emergency applications.


By way of example, when measuring the airflow around actuators in the wings of commercial aircraft, cabin flow or weight-optimised flow rate measurement of life support systems in crewed spaceflight: Höntzsch has the customised solution!