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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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