Home / Products / Air Velocity / Air Velocity Transmitter Air Velocity Transmitter This category contains sensors with an electrical transmission output for remote indication of air flow rate. Some products have LEDs while others have applications in clean room systems. Series 641RM For Remotely Mounting Electronic EnclosureAir Velocity Transmitter with Remote Probe connects the sensing probe with the electronic enclosure allowing the enclosure to be mounted where it can be accessed. Model 641B Dirty Air Flow ApplicationsAir Velocity Transmitter is used for dirty air flow applications. Applications include clean room ventilation monitoring, fan supply, and exhaust tracking. Series AVU Ideal for Building Automation Systems, ±5% or ±8% Full Scale AccuracyAir Velocity Transmitter ideal for a wide range of HVAC measurement and control applications. Applications include zone control in HVAC systems and clean room systems. Series 641 High Accuracy, Field Selectable RangesAir Velocity Transmitter is ideal for monitoring air flow. Optional LED produces complete, low cost solutions for local indication of air flow. Series AVUL 3% and 5% ModelsAir Velocity Transmitter accurate and available for a variety of needs. Measures air velocity and volumetric flow. Applies to VAV systems and building ducts.