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SERIES 476A & 478A
SINGLE PRESSURE AND DIFFERENTIAL PRESSURE DIGITAL MANOMETERS
Electronic Zeroing, ±1.5% Accuracy
CALIBRATION SERVICES AVAILABLE
TEST, ADJUST, & BALANCE
The Series 476A Single Pressure Digital Manometer can be used to measure low
pressures from -20 to 20 in w.c. with ±1.5% full-scale accuracy.
The Series 478A Single Pressure Differential Pressure Digital Manometer can
be used to measure positive, negative, or differential pressures with ±1.5% full-scale
accuracy. Both units are constructed of an extruded aluminum case for exceptional
durability.
BENEFITS/FEATURES
• ±0.5% full-scale accuracy
• Rugged extruded aluminum housing
• One button auto-zero function
• Auto power off function to conserve battery life
• Instant selection of up to nine English/metric units
APPLICATIONS
• Verify eld instrumentation performance
• Adjust fuel mixture on combustion systems
MODEL CHART
Available Pressure Units
.0498
0.723
1.471
.1495
.1445
2.168
.294
4.41
4.98
0.996
14.95
20.00
4.00
60.0
37.4
7.47
112.1
49.8
9.96
149.5
508
101.6
1524
Model
476A-0
478A-0
478A-1
Range
in w.c.
-20.0 to 20.0
-4.00 to 4.00
-60.0 to 60.0
[71.58]
6-17/32
[165.82]
5-57/64
[149.68]
29/32
[22.99]
SPECIFICATIONS
Service: Air and compatible gases.
Wetted Materials: Consult factory.
Accuracy: ±1.5% FS at 72°F (22.2°C). Includes linearity and repeatability.
Pressure Hysteresis: ±0.1% FS.
Pressure Limits: 5 psig (.74 bar).
Temperature Limits: 0 to 140°F (-17.8 to 60°C).
Compensated Temperature Limits: 32 to 104°F (0 to 40°C).
Thermal Effect: 0.05% FS/°F.
Display: 4 digit LCD (.425˝H x .234˝W digits).
Power Requirements: 9 V alkaline battery, installed non-functional, user
replaceable.
Process Connections: For use with 3/16˝ or 1/4˝ ID tubing.
Weight: 10.8 oz (306 g).
Compliance: CE.
996
-
Resolution
in w.c.
0.02
0.01
0.1
Maximum
Pressurebar psi in Hg kPa in w.c. mm Hg mbar mm w.c. Pa
5 psig
5 psig
5 psig
[71.58]
5-57/64
[149.68]
6-17/32
[165.82]
Manometers,
Portable
OPTIONS
To order add sufx: Description
-NIST NIST traceable calibration certicate
Example: 478A-1-NIST
ACCESSORIES
Model Description
A-402A
A-47X-BOOT
Carrying case, tough gray nylon pouch protects any Series 476A/478A
manometer, double zippered for quick and easy access, belt loop that
snaps closed, 7-1/2˝H x 3˝W x 2-1/4˝D (191 x 76 x 57 mm)
Protective magnetic rubber boot
A-402A
A-47X-BOOT
(manometer not included)
Process Tubing Options: See page 453 (Gage Tubing Accessories)
DWYER INSTRUMENTS, LLC | dwyer-inst.com
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