Air & Velocity Sensors by Dwyer Instruments

Air & Velocity Sensors by Dwyer Instruments

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Dwyer extensive range is functional and specified to many industries. The range includes:

  • The Series AAFS Adjustable Air Flow Paddle Switch is capable of detecting a wide range
    of air velocities with minimal user calibration. Quality features include a
    stainless steel vane, galvanized steel base, and ABS enclosure.
  • The Series AVFS Adjustable Air Flow Switch is specifically designed to monitor
    air flow in ducts and provides a 3 A contact output to indicate a change or
    loss of flow. The AVFS provides a 5% set-point repeatability across a full
    scale range of 1-10 m/s (197-1969 fpm) and includes a mounting bracket for
    quick duct mounting.
  • The Series
    AVUL Air Velocity Transmitter
    quickly and accurately measures air
    velocity or volumetric flow in imperial or metric units. Simultaneous current
    and voltage outputs on all models provide universal inputs to monitoring
    equipment while the output range, units, and 0 to 5/10 VDC output can be
    configured via local DIP switches. The optional integral display, or the
    portable remote display tool, provide a convenient way to locally monitor
    process values and configure the unit. Models are available in 3% and 5% accuracy
    models to suit a variety of needs, and the optional BACnet MS/TP or Modbus
    RTU/ASCII communication protocol allows units to be daisy-chained while
    providing access to all of the velocity and flow data, as well as additional
    information such as air temperature.
  • The Series
    FLST Airflow Measurement Station
    is easy to install — simply connect
    the tubing to the station fittings, then to a differential pressure manometer,
    gage, transmitter or switch. Single or multiple airflow elements are factory
    mounted and pre-piped in a casing designed for flanged connection to the duct work.
    Standard materials consist of a G90 galvanized casing and 6063-T5 anodized
    aluminum flow sensors, suitable for most HVAC applications. The
    Series FLST utilizes an airflow averaging element in a head-type device,
    generating a differential (velocity) pressure signal similar to the orifice,
    venturi, and other had producing primary elements. Strategically located
    sensing ports continually sample the total and static pressures when inserted
    normal to flow.Total pressure sensed by the upstream ports are continually
    averaged within the airflow element in an isolated chamber. The static sensing
    ports are averaged in a second isolation chamber. Multiple elements are joined
    together for connection to a differential measurement device (gage,
    transmitter, etc.) for flow measurement and indication purposes.
  • The Series PAFS-1000 Averaging Flow Sensor is
    ideal for sensing differential pressure in the inlet section of variable air
    volume terminal units and fan terminal units. Units can also be used to sense
    differential pressure at other locations in the main or branch duct systems. The “H” port senses total pressure and the
    “L” port senses static pressure. The difference between these signals
    is the differential, or velocity pressure. For models PAFS-1002 to PAFS-1005,
    up to four sensing points and lengths of 3-5/32″ to 9-29/32″ (8.02 to
    25.26 cm) to accommodate box size diameters of 4″ to 16″ (10.16 to
    40.64 cm) are available. For models PAFS-1006 to PAFS -1011, up to 10 sensing
    points and lengths from 12-1/2″ to 23-29/32″ (31.75 to 60.72 cm) are
    available to accommodate appropriately sized duct dimensions.

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