Dwyer Series 471
Digital Thermo Anemometers are versatile dual function
hot-wire instruments that quickly and easily measure air velocity
in four field selectable ranges, in either feet per minute or
meters per second, plus air temperature in °F or °C. The high
contrast LCD display shows both range selected and present
velocity. Convenient backlight provides perfect visibility in low
light conditions. Light automatically shuts off after 2-1/2
minutes to prolong battery life. Low -battery warning is
included.
The rugged, stainless steel probe
with comfortable hand grip is etched with insertion depth marks
from 0-8 inches and 0-20 cm on the Model 471-1. When fully
extended, the probe length on models 471-2 and 471-3 reach 33
inches (83 cm). Model 471-3 features a telescoping bendable probe
for easy access in hard-to-reach locations.
The extruded aluminum meter body
fully protects electronics, yet is lightweight and comfortable to
hold even when taking multiple readings as part of duct traverses.
An integral sliding cover protects sensors when not in use.
Standard accessories are 9 volt alkaline battery, wrist strap,
custom fitted carrying case and step drill for making duct holes
from 3/16˝ to 1/2˝.
DWYER 471 THERMO-ANEMOMETER
SPECIFICATIONS
AIR VELOCITY:
Service: Air.
Range: Field selectable 0-500, 0-1500, 0-5000, 0-15000
FPM (see chart below for metric conversions).
Accuracy: Depending on range (See chart below) @ 59 to
86°F (15 to 30°C). Outside this range add 0.11% per °F (0.2%
per °C).
Temperature Limits: Probe: 0 to 200°F (-18 to
100°C).
Ambient: 32 to 104°F (0 to 40°C).
Display: 4-1/2 Digit 0.4˝ High.
Resolution: 1 FPM / 0.1 MPS.
Response Time: 15 seconds.
Power Requirements: 9 volt alkaline battery,
included.
Probe: 5/16˝ (8.13 mm) diameter probe with integral
hand grip and 6 ft. (15.2 cm) coiled cord. Length of probe:
Model 471-1 = 10˝ (25.4 cm); Models 471-2 and 471-3 = 33˝ (83 cm)
extended.
Weight/Dimensions: 12 oz (340 g) /
6-/16"x2-13/16"x29/32" (166x71x23 mm)
TEMPERATURE:
Range: 0 to 200°F (-18 to 100°C).
Accuracy: ±2°F (1°C).
Temperature Limits:
Probe: 0 to 200°F (-18 to 100°C);
Ambient: 32 to 104°F (0 to 40°C).
Display: 4-1/2 Digit 0.4˝ high.
Resolution: 0.1°.
Response Time: 30 seconds.
Range Number
|
Velocity FPM
|
Velocity MPS
|
Accuracy |
|
1
|
0-500 |
0-3.0 |
±3% F.S. |
|
2
|
0-1500 |
0-7.0 |
±3% F.S. |
|
3
|
0-5000 |
0-30 |
±3% F.S. |
|
4
|
0-15000 |
0-75 |
±5% F.S.
|
 |
 |
 |
|
Model 471-1, Thermo Anemometer
includes battery, wrist strap, 6-step drill,
carrying case and instructions.
|
Model 471-2, Thermo
Anemometer
with telescoping probe includes battery,
wrist strap, 6-step drill, carrying case
and instructions. |
Model 471-3, Thermo Anemometer
with telescoping bendable tip includes
battery, wrist strap, 6-step drill,
carrying
case and instructions. |
