Dwyer Instruments SERIES 475 Catalog Page
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[71.44]
[23.02]
5/8 [15.88]
®
SERIES 475
INTRINSICALLY SAFE HANDHELD DIGITAL MANOMETER
Ranges from 1 in w.c. to 150 psid, ±0.5% Accuracy
TEST & DATA
[149.23]
5-7/8
1-1/16
[26.98]
BARBED FOR 1/8 OR 3/16
I.D. TUBING 475-7 & 475-8 ONLY
1/8 I.D. X 3/16 O.D. TUBING
The Series 475 Intrinsically Safe Handheld Digital Manometer measures positive,
negative, or differential pressures of air and natural gases in ranges from 1 in w.c.
(0.249 kPa) to 150 psid (10.34 bar). The dual push pads on the front panel control the
on/off, auto zero, and pressure unit selection, allowing for simple operation with no set
up needed. When used with a Dwyer
as an air velocity gage.
FEATURES/BENEFITS
• Rugged aluminum case protects instrument from damage during transport/use
• Large, easy to read LCD and simple operation
• FM approved to be intrinsically safe in hazardous locations, Class 1, Div 2, Groups
A, B, C, D, T4 Ta = 70°C
APPLICATIONS
Portable
• Monitoring natural gas pressures on boilers and other combustion equipment
Manometers,
• Air velocity monitoring, when used with a Dwyer
• Field calibration of other instruments
• Monitoring or troubleshooting HVAC systems
MODEL CHART
Model English Range Metric Range Maximum Pressure
475-000-FM
475-00-FM
475-0-FM
475-1-FM
475-2-FM
475-3-FM
475-4-FM
475-5-FM
475-6-FM
475-7-FM
475-8-FM
0 to 1.000 in w.c.
0 to 4.000 in w.c.
0 to 10.00 in w.c.
0 to 20.00 in w.c.
0 to 40.00 in w.c.
0 to 200.0 in w.c.
0 to 10.00 psi
0 to 20.00 psi
0 to 30.00 psi
0 to 100.0 psi
0 to 150.0 psi
®
Pitot tube (u), the Series 475 can also be used
®
Pitot tube (u) and AV calculator
.2491 kPa
0.996 kPa
2.491 kPa
4.982 kPa
9.96 kPa
49.82 kPa
.6895 bar
1.379 bar
2.069 bar
6.895 bar
10.34 bar
5 psig
5 psig
5 psig
10 psig
10 psig
30 psig
30 psig
60 psig
60 psig
150 psig
200 psig
29/32
SPECIFICATIONS
Service: Air and compatible combustible gases.
Wetted Materials: Consult factory.
Accuracy: ±0.5% FS, 60 to 78°F (15.6 to 25.6°C); ±1.5% FS from 32 to 60°F and
78 to 104°F (0 to 15.6°C and 25.6 to 40°C).
Pressure Hysteresis: ±0.1% FS.
Pressure Limits: See chart.
Temperature Limits: 0 to 140°F (-17.8 to 60°C).
Compensated Temperature Limits: 32 to 104°F (0 to 40°C).
Storage Temperature Limits: -4 to 176°F (-20 to 80°C).
Display: 0.42˝ (10.6 mm) 4 digit LCD.
Resolution: See chart.
Power Requirements: 9 V alkaline battery, installed non-functional, user
replaceable.
Weight: 10.8 oz (306 g).
Process Connections: Two barbed connections for use with 1/8˝ (3.18 mm) or
3/16˝ (4.76 mm) ID tubing. Two compression ttings for use with 1/8˝ (3.18 mm) ID
x 1/4˝ (6.35 mm) OD tubing for 475-7 & 475-8 only.
Agency Approvals: CE, FM approved to Class I, Div 2, Groups A, B, C, D, T4 Ta
= 70°C.
ACCESSORIES
Model Description
A-402A
UHH-C1
A-47X-BOOT
Carrying case, tough gray nylon pouch protects any Series 475
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)
Soft carrying case
Protective magnetic rubber boot
2-13/16
OPTIONS
To order
add sufx: Description
-AV Air velocity kit, includes the Series 475 manometer, two A-303 static
Examples: 475-1-AV; 475-000-AV
-NIST NIST traceable calibration certicate
Example: 475-1-NIST
pressure tips two 9´ lengths 3/16˝ ID rubber tubing, no. 166-6-CF pitot
tube, A-397 step drill, A-532 air velocity slide chart and instruction
bulletin H-11, all packed in a tough, molded plastic carrying case with
die cut foam liner.
A-402A UHH-C1
Process Tubing Options: See page 455 (Gage Tubing Accessories)
-AV option
475-AV air velocity kit
uPitot tube: See pages 205-234 (Air Quality section)
A-47X-BOOT
(manometer
not included)
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