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Series-475
Handheld Digital Manometer for Air/Gas Pressure, 1 inH2O to 150 psid
Models In Stock
- 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
Series-475
From
$
283.60
Models In Stock
Can't find the right model?
Use our custom configurator to fine tune your product
Product Overview
- Accuracy ± 0.5 %
- Accuracy Detail ± 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)
- Battery Size and Type Alkaline 9V
- Compensated Temperature, Max 104 °F
- Compensated Temperature, Min 32 °F
- Compliance Note CE, FM approved to Class I, Div 2, Groups A, B, C, D, T4 Ta = 70°C
- Display Note 0.42˝ (10.6 mm) 4 digit LCD
- Display Type LCD
- Hysteresis ± 0.1%
- Materials, Wetted Consult Factory
- Measurement Type Pressure
- Media Compatibility Clean dry air / inert gas, Fuel gases, HVAC / room air, Inert / non-reactive gases, Compatible Gases, Methane, Nitrogen, Propane
- Number of Digits 4
- Operating Temperature, Max 140 °F
- Operating Temperature, Min 0 °F
- Measurement Pressure, Min 0 psi
- Storage Temperature, Max 176 °F
- Storage Temperature, Min -4 °F
- Supply Power Type Battery
- Weight 10.8 oz
The Series 475 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® Pitot tube, the Series 475 can also be used as an air velocity gage.
NIST CALIBRATION available in Product Configurator.
Product Applications
- Monitoring natural gas pressures on boilers and other combustion equipment
- Air velocity monitoring, when used with a Dwyer® Pitot tube and AV calculator
- Field calibration of other instruments
- Monitoring or troubleshooting HVAC systems
PDFs & Manuals
Accessories
accessories
Rubber latex tubing has less tendency to kink in storage and occupies less space, thus is best for portable work. 3/16" ID, 9' length.
$12.30 / each
2617 In Stock
Portable static pressure tip, for 3/16" ID rubber or plastic tubing with 4" insertion.
$16.05 / each
0 In Stock
Rugged step drill, quickly provides true round holes in thin materials, no center punch needed to start, automatically de-burrs drilled hole, high speed steel, drills 3/16" through 1/2" holes in 1/16" increments.
$87.85 / each
117 In Stock
Carrying case for most manometers; tough, gray nylon pouch, double zippered with belt loop
$67.05 / each
3208 In Stock
Plastic carrying case with foam liner for 475-1-AV air velocity kit - 13-1/2" x 10" x 2-3/8".
$117.30 / each
0 In Stock
installation hardware
sensors
Pocket size Pitot tube, 1/8" dia., 6" insertion length, 3" tip, with 1/8" male NPT compression fitting.
$190.80 / each
24 In Stock
Show Ratings & Reviews
Rated 4 out of
5
by
Ambriz 15 from
Great unit and easy to use . We use it every day
Great unit and easy to use, the only thing it takes forever to arrive
Date published: 2026-02-14
Rated 5 out of
5
by
Shubham from
DywerOmega Manometer - Great Product!
On point product - does offer everything as described. Works pretty accurate. Also came with add-on NIST calibration certificate. shipping was pretty quick.
Date published: 2025-11-10
Rated 2 out of
5
by
Triangle from
Disapointed
Ordered 20 units, 10 10" WC and 10 20" WC. 16 were found bad and returned for repair, still waiting.
Date published: 2025-07-22
Rated 4 out of
5
by
Big OG from
A Great product
A Great product that provides the correct readings
Date published: 2025-05-27
Does it measure vacuum pressure? (ie are the pressure ranges given in absolute pressure, or gauge pressure?)
Hello,
These measure positive differential pressure in gauge pressure. They can read vacuum if it is applied to the low port with the high port left open to atmosphere.
Date published: 2026-03-20
Can it be used in steam service? (I am interested in this product for steam ejector troubleshooting. The low pressure port would be connected to the jet mixing chamber, which is majority steam under vacuum.)
Hello,
These units are not compatible with steam.
Date published: 2026-03-23
What is the reference temperature of the inches of water units?
Hello,
Our calibration system that we use on the handheld manometers assumes a reference temperature of 20°C for inches of water column.
It is also assumed at standard sea level conditions.
Date published: 2025-12-30
RoHS 2015/863 - View Certificate
CE Approved
FM
