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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. 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.
ACCESSORIES
Stainless Steel Calibrated Pitot Tube - (18" Model
160-18 standard, other lengths available - see "Ordering" page).
Graduated both sides in inches to show insertion depth for easy
accurate duct traverse.
Clean, burr-tree static holes. Suitable for temperatures up to
1500°F.
Rubber Tubing with Connectors - Two coils of 3/16" with metal
terminal tubes.
Magneclip side mountings. Attach meter instantly to steel duct
or surface.
Red Gage Oil - Spare bottle. For occasional refilling. Supply
sufficient for several years of normal use. (Blue Gage Oil furnished
with Model 400-23).
Instruction Card - Easy to read and understand. Plastic laminated,
wipes clean.
Dwyer® Air Velocity Calculator - Slide rule eliminates tedious
calculations - easily compensates for temperature, humidity and
barometric pressure variations.
Steel Carrying Case - Professional quality. Welded seams, enamel
finish. Hinged top locks with hasps. Foam plastic lined and fitted
to protect meter and accessories. Size* 11-1/2" H x 20-1/4" W x
1-1/2" D. Only 13-1/2 lbs. with equipment.
*No. 400-5-S is 11" x 11-1/2" x 2-1/2". Contact
factory for extra long steel cases for use with longer Pitot
tubes.
Air Velocity Meter Series 400 Manual
Air Velocity Meter Series 400
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