AV75 : High-Precision Air / Gas Velocity Transmitter for Industrial Applications

The AV 75 series air velocity transmitters were developed to obtain accurate measuring results over a wide range of velocities and temperatures.

Ahigh-quality hot film sensor element based on cutting-edge thin film technology ensures maximum sensitivity, even at lowest mass flows.

At the same time, the innovative probe design produces reliable measuring results at high flow velocities of up to 40m/s(8000ft/min).The integrated temperature compensation minimises the temperature cross-sensitivity of the Av75 series which, combined with the robust mechanical design, allows it to be used at process temperatures between -40 to +160°C (-40 to 320°F).

In addition to air velocity and temperature values, the transmitter calculates the volumetric flow rate in m³/min or ft³/min. The cross section of the duct needs to be determined for this purpose and the volumetric flow rate can be displayed and directed to one of the analogue outputs.

The configuration software included in the scope of supply allows to choose the appropriate output parameter and freely scale the display range and signal level of the two analogue outputs. In addition user-friendly calibration of the air velocity and temperature and the adjustment of key parameters (e.g. response time of the velocity measurement, low flow cut-off points, etc.) are supported as well.

An optional illuminated display with two control buttons integrated in the cover is available. In addition, this enables changes of the configuration to be made directly on the unit.

The AV 75 series has a robust metal housing to protect against possible damage in rough industrial environments. There are five different models, providing a comprehensive range of mounting options:

– Model A for wall mounting
– Model B for duct mounting
– Model C with remote probe
– Model E with remote probe, pressure-tight up to 10bar (145psi)

The AV 75 series can be used to measure the velocity of other gasses as well, although a correction has to be applied to the unit at the factory.