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0 reviews | UPC: 793950401194 | Model: Extech 407119
Heavy Duty Hot Wire CFM Thermo-Anemometer
List Price: $559.00
Your Price: $497.51
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The 407119 Heavy Duty CFM Hot Wire Thermo--Anemometer uses a telescoping probe (extends up to 3 ft) which is ideal for use in ducts and ventilating systems. It can accurately measure Air Flow (CFM/CMM), Air Velocity and Temperature. Air Flow can be displayed as an instantaneous value or up to a 20 point average. Additional functions include Data Hold, Min/Max, and Auto power off. Comes complete with the telescoping probe with 5.5ft cable, and 4 x AA batteries.
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Hot-Wire Anemometers offer a slim sensor (0.5" diameter), well suited for accessing small openings and crevices (engine compartments and small ventilating systems). Hot-Wire Anemometers don’t have vulnerable, movable mechanical parts that can wear or become damaged over time. Vane Anemometers are lower cost and allow easy visual inspection of the moving vane (great for air duct and fume hood applications).
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Answered by Anonymous
Vane Anemometers use a remote fan (vane) that freely rotates in response to air flow. The vane movement equates to air velocity readings that can be displayed on a meter. The Hot Wire Anemometer sensor is a special wire whose resistance fluctuations are translated into air velocity readings that can be displayed on a meter.
Cubic Feet per Minute (CFM) or Cubic Meters per Minute (CMM) are units of measure for air volume measurements. This is a measurement of the quantity of moving air through an air duct, passageway, or enclosure. In order to determine this, the area of the duct must be measured. The area value (in ft2 or m2) is entered by the user, by pushbutton or keypad into the meter and an air velocity is determined.
Anemometers measure moving air with a rotary sensor that acts very much like a weathervane and can be likened to the blades of a fan. The vane freely rotates in response to airflow, and as the air moves through the vane the blades turn in proportion to the speed of the air.
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