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Dwyer Slack-Tube® Manometers are
as accurate as the finest laboratory "U" gages - yet
they are made to roll up compactly for easy carrying
and to withstand rough usage.
Simply unroll the Dwyer Slack-Tube® Manometer
and set up to read static pressure, vacuum, or differential
pressure. Magnetic clips hold it firmly to any steel
surface or hang it on a nail. Turn connectors one revolution
to open. When the pressure is imposed, add the number
of inches one column travels up to the number of inches
the other column travels down. When reading is completed
turn connectors to seal columns, roll up manometer into
compact coil and tuck it away in its circular metal case
or a tool box. No fluid lost. No loose caps or inserts
to lose.
Dwyer Slack-Tube® Manometers cover
a wide range of pressure readings - from 4-0-4 inches
up to 60-0-60 inches. Use them in determining velocity
and static pressures, for leakage, fan and blower tests,
calibrating control devices, checking gas pressure and
many other applications. All models have flexible vinyl-plastic
columns and flexible spring steel scale calibrated in
inches of water using water; and inches of mercury using
mercury. Scale is center-mounted between columns to eliminate
parallax error and has a full 2" sliding zero adjustment.
All Dwyer Slack-Tube® Manometers
feature exclusive molded nylon tubing connector assemblies
with rapid shutoff design in an acrylic plastic top.
One turn counter clockwise and the instrument is ready
for use. Another turn seals the tubes completely. Molded
all-nylon construction makes this assembly corrosion-proof,
leakproof and practically unbreakable. Tubing connectors
extend horizontally allowing 360° freedom. Tubes
won't bend or pinch off.
All models have over pressure safety
traps in the top of both columns to prevent loss of fluid
due to over range pressures or surges in pressure.
Slack-Tube® Manometers are suitable
for intermittent total pressure to 50 psi and vacuum
not exceeding 20" Hg. Avoid temperatures above 130°F
and continuous high total pressure. Not for use with
red gage oil; use only water or mercury.
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