Fuji Electric - Model FWD -Ultrasonic Flowmeters for Air

• Abundant applicable pipe diameters: From Ø25 to Ø200 mm
• No energy loss: Non-intrusive ultrasonic sensor causes no pressure loss
• Tolerant to Oil Mist: With no moving parts, FWD is robust, and requires no filters.
• Battery powered version: The version equipped with a lithium-ion battery (10-year life) greatly lightens the installation work.
• Flow rate conversion: Measured flow rate can be converted into a flow rate under normal conditions of a temperature of 0 degree C (273.15 K) and an absolute pressure of 1 atm or user-defined conditions.)
• Bi-directional flow measurement: FWD can measure the air transfered between facilities, and the air flow in loop piping system.

Two ultrasonic sensors are installed on each side of the flowmeter input and output When liquid flows (in the direction of the arrow shown on the diagram), difference of transit time by flow velocity occurs between sound waves generated from flow entrance and exit. This time lag is used for detecting the flow velocity of the fluid and calculating the volumetric flow according to cross-section area of the flow meter and flow velocity.Furthermore, this flowmeter is capable of converting into NORMAL flow rate by means of build-in pressure sensor in the flowmeter.

• Pipe diameter (mm) : 25, 32, 40, 50, 65, 80, 100, 150, 200
• Power supply : 24 V DC ±10% or Built-in battery type (battery life : approx.10years at 20˚C)
• Power consumption : 24 V DC, 1.5 W or less
• Applicable fluids : Air (mainly air factory) or Nitrogen (25-80 mm diameter)
• Teperature and humidity of fluid : 10°C to 60°C, RH 90% or less
• Working pressure : 0 to 1 MPa (gauge pressure)