Air Flow Measurement

Measure both pressure and air velocity Read the red figures directly in feet per minute of velocity from 400 to 10,000 fpm No conversion tables needed for air at standard conditions. Read the black figures in inches of water column air pressure from 0 to 10 w.c. Our most popular precision air velocity instrument, the No. 400 is used to balance air conditioning systems, measure pressure drop across filters, and test fan and blower discharge and inlet pressures, as well as air velocity in ducts. It offers the convenience of a dual purpose instrument plus high accuracy on easy-to-read scales. The Series 400 includes leveling adjustment and glass bubble level, which makes it a versatile, all around manometer for the air conditioning and balancing contractor or industrial plant. Kit includes No. 400 Air Meter and all accessories: Combination Inclined/Vertical Manometer. Dwyer® Durablock precision machined solid acrylic plastic construction is virtually indestructible. Has both inclined section for high accuracy and vertical section for extended range. Pressure marked in black, Velocity in red figures. Easy to read no reference tables needed. Has screw leveling adjustment and ground glass bubble level. 0-5 in H2O 400-9000 FPM velocity 18 Pitot tube

Measure both pressure and air velocity Read the red figures directly in feet per minute of velocity from 400 to 10,000 fpm No conversion tables needed for air at standard conditions. Read the black figures in inches of water column air pressure from 0 to 10 w.c. Our most popular precision air velocity instrument, the No. 400 is used to balance air conditioning systems, measure pressure drop across filters, and test fan and blower discharge and inlet pressures, as well as air velocity in ducts. It offers the convenience of a dual purpose instrument plus high accuracy on easy-to-read scales. The Series 400 includes leveling adjustment and glass bubble level, which makes it a versatile, all around manometer for the air conditioning and balancing contractor or industrial plant. Kit includes No. 400 Air Meter and all accessories: Combination Inclined/Vertical Manometer. Dwyer® Durablock precision machined solid acrylic plastic construction is virtually indestructible. Has both inclined section for high accuracy and vertical section for extended range. Pressure marked in black, Velocity in red figures. Easy to read no reference tables needed. Has screw leveling adjustment and ground glass bubble level. 0-5 in H2O 400-9000 FPM velocity 8 Pitot tube

The Capsuhelic gauge is designed to give fast, accurate indication of differential pressures. The gauge may be used as a readout device when measuring flowing fluids, pressure drop across filters, liquid levels in storage tanks and many other applications involving pressure, vacuum or differential pressure. Using the basic design of Dwyers time-proven Magnehelic gauge, the Capsuhelic gauge contains a simple, frictionless movement that permits full scale readings as low as 0.5 in H2O. The pressure being measured is held within a capsule which is an integral part of the gauge. This containment of the pressure permits the use of the gauge on system pressures of up to 500 psig, even when differentials to be read are less than 0.1 in H2O. The diaphragm-actuated Capsuhelic gauge requires no filling liquid which might limit its outdoor applications. Zero and range adjustments are made from outside the gauge, and there is no need to disassemble the gauge in normal service. Note: May be used with Hydrogen. Order a Buna-N diaphragm. Pressures must be less than 35 psi. Brass case 0-1 in H2O

The new Series 641 Air Velocity Transmitter is the ideal instrument for monitoring air flow. This transmitter uses a heated mass flow sensor which allows for precise velocity measurements at various flow rates and temperatures. The 641s 16 field selectable ranges provides it the versatility to be selected for several air flow applications. The optional LED produces a complete, low-cost solution for local indication of air flow. Ranges to 15,000 FPM or 75 MPS Optional Bright LED Display Easy Push Button Set-up Compact Housing 4-20 mA Output Digital Filter for Signal Damping 12 (304.8 mm) probe length with LED display

The new Series 641 Air Velocity Transmitter is the ideal instrument for monitoring air flow. This transmitter uses a heated mass flow sensor which allows for precise velocity measurements at various flow rates and temperatures. The 641s 16 field selectable ranges provides it the versatility to be selected for several air flow applications. The optional LED produces a complete, low-cost solution for local indication of air flow. Ranges to 15,000 FPM or 75 MPS Optional Bright LED Display Easy Push Button Set-up Compact Housing 4-20 mA Output Digital Filter for Signal Damping 18 (457.2 mm) probe length with LED display

The new Series 641 Air Velocity Transmitter is the ideal instrument for monitoring air flow. This transmitter uses a heated mass flow sensor which allows for precise velocity measurements at various flow rates and temperatures. The 641s 16 field selectable ranges provides it the versatility to be selected for several air flow applications. The optional LED produces a complete, low-cost solution for local indication of air flow. Ranges to 15,000 FPM or 75 MPS Optional Bright LED Display Easy Push Button Set-up Compact Housing 4-20 mA Output Digital Filter for Signal Damping 24 (609.6 mm) probe length with LED display

The new Series 641 Air Velocity Transmitter is the ideal instrument for monitoring air flow. This transmitter uses a heated mass flow sensor which allows for precise velocity measurements at various flow rates and temperatures. The 641s 16 field selectable ranges provides it the versatility to be selected for several air flow applications. The optional LED produces a complete, low-cost solution for local indication of air flow. Ranges to 15,000 FPM or 75 MPS Optional Bright LED Display Easy Push Button Set-up Compact Housing 4-20 mA Output Digital Filter for Signal Damping 30 (762 mm) probe length with LED display

The new Series 641 Air Velocity Transmitter is the ideal instrument for monitoring air flow. This transmitter uses a heated mass flow sensor which allows for precise velocity measurements at various flow rates and temperatures. The 641s 16 field selectable ranges provides it the versatility to be selected for several air flow applications. The optional LED produces a complete, low-cost solution for local indication of air flow. Ranges to 15,000 FPM or 75 MPS Optional Bright LED Display Easy Push Button Set-up Compact Housing 4-20 mA Output Digital Filter for Signal Damping 36 (914 mm) probe length with LED display