Series 475-FM Mark III Handheld Digital Manometer
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| Ranges from 1 in. w.c. to 150 psid, ±0.5%
Accuracy. |
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| Features |
| New LOW Range Option 0-1.00 in. w.c. |
| Measures Positive, Negative and Differential Pressures |
| Rugged, Extruded Aluminum Case |
| Lightweight, Fast and Easy to Use |
| Dual Calibration with English and Metric Units |
| FM Approved |
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| Applications |
|
 The
Dwyer Series 475 Mark III Handheld Digital Manometer is ideal
for field calibration, monitoring or trouble shooting HVAC
systems, clean rooms or a wide range of other low pressure
pneumatic systems. This handy instrument 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 Series 475-FM is approved and is intrinsically safe for
hazardous locations, Class 1, Div.1, Group A, B,C, D, T4.
Its simple operation and easy to read digital display make
it an indispensable test instrument for the plant engineer,
industrial hygienist and HVAC technician. When used with a
Dwyer Pitot tube (see Air Velocity), the Series 475 Mark III
can also be used as an air velocity gage. See the complete
475-1-FM-AV kit described below.
The Series 475-FM Mark III is housed in a durable extruded
aluminum case with its solid state circuitry mounted on a
tough fiberglass epoxy circuit board. A standard 9 volt battery
provides up to 100 hours of operation. Dual push pads on the
front panel control on-off operation and English or metric
pressure unit selection. No setup or leveling. Zero adjust
knob is conveniently located on top. The large 1/2" LCD
display is easy to read, minimizing data collection errors.
Units include a "low battery" indicator. The pressure
sensor used is a highly stable silicon piezoresistive device.
Standard connections are dual sized for 1/8" or 3/16"
I.D. vinyl or rubber tubing. Complete instructions are conveniently
printed on rear of housing.
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| SPECIFICATIONS |
Service: Air and combustible, compatible gases.
Wetted Materials: Consult Factory.
Accuracy: ±0.5% F.S., 60 to 78°F (15.6 to 25.6°C);
±1.5% F.S. 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% of full scale.
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: 0.5" liquid crystal. 3-1/2 digits.
Resolution: See chart.
Power Requirements: 9 volt alkaline battery. Battery not connected.
Weight: 10.8 oz. (306 g).
Connections: Two barbed connections for use with 1/8" (3.18
mm) or 3/16" (4.76 mm) I.D. tubing. Two compression fittings
for use with 1/8" (3.18 mm) I.D. x 3/16" (4.76 mm)
O.D. tubing for 475-7-FM & 475-8-FM only.
Agency Approvals: FM, CE. |
| |
 475-AV
AIR VELOCITY KIT - Includes your choice of Series 475-FM
Manometer, two A-303 static pressure tips, two 9 ft. lengths
3/16" I.D. 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. To order, add AV suffix to any standard
475 model number. |
| ACCESSORIES |
|
A-402 CARRYING POUCH
— Tough gray nylon pouch protects any Series 477
Manometer. Double zippered for quick and easy access.
With belt loop that snaps closed. 72"H x 3"W
x 24"D (191 x 76 x 57 mm)
Request Model A-402A
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| Popular Standard Models |
| Model
Number |
English
Range |
Metric
Range |
Max.
Pressure |
| 475-000-FM |
0
- 1.00 in. w.c |
0
- .249 kPa |
10
in. w.c./2.5 kPa |
| 475-00-FM |
0
- 4.00 in w.c. |
0
to .995 kPa |
5
psig/35 kPa |
| 475-0-FM |
0
- 10.00 in. w.c. |
0
- 2.49 kPa |
5
psig/35 kPa |
| 475-1-FM |
0
- 19.99 in. w.c. |
0
- 4.97 kPa |
10
psig/68.9 kPa |
| 475-2-FM |
0
- 40.0 in. w.c. |
0
- 9.95 kPa |
10
psig/68.9 kPa |
| 475-3-FM |
0
- 199.9 in. w.c. |
0
- 49.7 kPa |
30
psig/207 kPa |
| 475-4-FM |
0
- 10.00 psid |
0
- .689 bar |
30
psig/207 bar |
| 475-5-FM |
0
- 19.99 psid |
0
- 1.378 bar |
60
psig/4 bar |
| 475-6-FM |
0
- 30.0 psid |
0
- 2.07 bar |
60
psig/4 bar |
| 475-7-FM |
0
- 100 psid |
0
- 6.89 bar |
150
psig/10 bar |
| 475-8-FM |
0
- 150 psid |
0
- 10.34 bar |
150
psig/10 bar |
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| Popular Air Velocity Kit Models |
| Model
Number |
Description |
| 475-000-FM-AV |
Air
Velocity Kit |
| 475-00-FM-AV |
Air
Velocity Kit |
| 475-0-FM-AV |
Air
Velocity Kit |
| 475-1-FM-AV |
Air
Velocity Kit |
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