Wind Speed Meter
HHF20 Series
With Optional
Temperature
Measurement
MADE IN
USA
Model HHF21
$
89
Basic Unit
Max and Average
Windspeed in KT, M/S,
KM/H, MPH, FPM or
Beaufort
Patented Field Replaceable
Impeller, Can Be Installed
Without Loss of Calibration
HHF22 Also Indicates
°C/°F and Windchill
The HHF20 Series can track maximum
and average wind speeds along with
current readings, and can display wind
speed in your choice of knots, meters per
second, kilometers per hour, miles per
hour, feet per minute or using the
Beaufort scale. For the HHF22,
temperature and wind chill can be
displayed in °C or °F.
The HHF20 Series relies upon a precision
ultralight impeller mounted on sapphire
bearings to measure wind speed. It
provides excellent accuracy (± 3%) and
the ability to measure the slightest breeze
(0.3 M/S). For temperature readings, the
HHF22 utilizes a fast-responding
thermistor accurate to ±1°C. Windchill is
calculated from wind and temperature data
using the U.S. National Weather Service's
official tables supplied with the HHF22.
The HHF20 Series is waterproof, buoyant
and comes with a convenient neck
lanyard. The battery is easy to replace and
provides 400 hours of use. The protective
slip-on case prevents damage to the unit.
Specifications
Performance
Operating Modes: Moving 3-second
average, maximum 3-second gust since
power on (MAX) or average since power
on (AVG).
On-Axis Accuracy: greater of ± 3% of
reading or ± least significant digit.
Off-Axis Response: -1% @ 5°, -2% @
10°, -3% @ 15°.
Calibration Drift: <2% after 100 hours
use at 7 M/S (~14 KT, 25 KM/H,
16 MPH or 1,400 FPM).
Minimum Speed: 0.3 M/S (~0.6 KT,
1 KM/H, 0.7 MPH, 60 FPM).
Maximum Speed: 40 M/S, ~78 KT,
144 KM/H, 89 MPH, 1,990 FPM
(HHF21), 7,830 FPM (HHF22)
Additional Information
on Anemometers
shown in the
Flow Section of this
Handbook
HHF21 Wind Speed Meter
U.S. Patented
Display Type: Reflective 21⁄2 digit
(HHF21) or 31⁄2 digit (HHF22) LCD, 0.4"
(HHF21) or 0.36" (HHF22) digit height.
HHF21 Resolution and Range:
KT, M/S, KM/H or MPH: resolution 0.1
up to 19.9, 1.0 above 20; max display
range 199. FPM: resolution 10, max
display range 1,990
HHF22 Resolution:
0.1 KT, MS, KM/H, and MPH;
1FPM below 1,999 FPM, 10 FPM
above 2,000 EPM (auto-ranging)
Update: 1 second.
Temperature and Windchill
Functions
Operating Modes: Temperature, wind
chill, (equivalent temperature as felt by
a person walking 4 MPH in calm
conditions)
Display Upgrade: 1 second
Accuracy: ± 1°C
Resolution: 0.1°C
Temperature Sensor: Thermistor
Temperature Measurement Range:
-15 to 50˚C (5 to 122˚F)
Other Functions
Auto Shutdown: after 30 minutes
Battery: User-replaceable CR2032 coin
cell. Typical life, 400 hrs
Environmental
Sealing: Electronics enclosure IP67water resistant to 1 m (3 ft); Buoyant
Shock: Drop tested to 2 m (6 ft)
Operating Temperature:
LCD operational temperature range
-15 to 50°C (5 to 122°F)
Storage Temperature:
Safe storage temperature range
-20 to 80°C (-4 to 176°F)
Physical
Impeller: Diameter 25 mm dia (1").
Jewel bearings. User-replaceable
assembly
Display: Reflective 31⁄2 digit LCD, 9 mm
(0.36") digit height (HH22); 21⁄2 digits
& 10 mm (4") digits Height (HH21)
Dimensions: 122 x 42 x 14 mm (4.8 x
1.7 x 0.6"); case 117 x 46 x 19 mm (4.6
X 1.8 X 0.7"); Lanyard 0.5 m (10")
Weight: Unit, 43 g (1.5 oz)
Case, 23 g (0.8 oz)
To Order (Specify Model Number)
Model No.
HHF21
HHF22
Accessory
Model No.
HHF2R
Price
$89
119
Price
15
Description
21⁄2 Digit Anemometer with Rigid Slip-On Cover
31⁄2 Digit Anemometer/Thermometer with Rigid Slip-On Cover
Description
Replacement Impeller
Ordering Example: HHF22, 31⁄2 digit anemometer/thermometer with rigid slip-on cover, $119.
L-18
L
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