| General Specifications |
| Sensors |
| Wind Speed |Air Speed |
Larger of 3% of reading, least significant digit or 20 ft/min |
0.1 m/s
1 ft/min
0.1 km/h
0.1 mph
0.1 knots
1 B*
0.1 F/S* |
0.6 to 40.0 m/s
118 to 7,874 ft/min
2.2 to 144.0 km/h
1.3 to 89.5 mph
1.2 to 77.8 knots
0 to 12 B*
2-131.2* |
| Ambient Temperature |
0.9 °F
0.5 °C |
0.1 °F
0.1 °C |
-20.0 to 158.0 °F
-29.0 to 70.0 °C |
| Relative Humidity |
2%RH |
0.1 %RH |
10 to 90% 25°C noncondensing |
| Pressure |
1.5 hPa|mbar
0.044 inHg
0.022 PSI |
0.1 hPa|mbar
0.01 inHg
0.01 PSI |
25°C/77°F
700-1100 hPa|mbar
20.67-32.48 inHg
10.15-15.95 PSI |
| Compass |
5° |
1°
1/16th Cardinal Scale |
0 to 360° |
| Calculated Measurement |
| Measurement |
Accuracy(+/-) |
Resolution |
Sensors Employed |
| Air Density |
0.0002 lb/ft3
0.0033 kg/m3 |
0.001 lbs/ft3
0.001 kg/m3 |
Temperature, Relative
Humidity Pressure |
| Air Flow |
6.71% |
1 cfm
1 m3/hr
1 m3/m
0.1m3/s
1 L/s |
Air Speed, User Input (Duct Shape & Size) |
| Altitude |
typical: 23.6 ft/7.2 m
from 750 to 1100 mBar
max: 48.2 ft/14.7 m
from 300 to 750 mBar |
1 ft
1 m |
Pressure, User Input
(Reference Pressure) |
| Barometric Pressure |
0.07 inHg
2.4 hPa|mbar
0.03 PSI |
0.01 inHg
0.1 hPa|mbar
0.01 PSI |
Pressure, User Input (Reference Altitude) |
| Crosswind & Headwind/ Tailwind |
7.1% |
1 mph
1 ft/min
0.1 km/h
0.1 m/s
0.1 knots |
Wind Speed, Compass |
| Delta T |
3.2 °F
1.8 °C |
0.1 °F
0.1 °C |
Temperature, Relative Humidity Pressure |
| Density Altitude |
226 ft 69 m |
1 ft 1 m |
Temperature, Relative Humidity, Pressure |
| Dew Point |
3.4 °F
1.9 °C
15-95% RH. Refer to
Range
for Temperature Sensor |
0.1 °F
0.1 °C |
Temperature, Relative Humidity |
| Evaporation Rate |
0.01 lb/ft2/hr
0.06 kg/m2/hr |
0.01 b/ft2/hr
0.01 kg/m2/hr |
Wind Speed, Temperature Relative Humidity Pressure, User Input (Concrete Temperature) |
| Heat Index |
7.1°F
4.0°C |
0.1 °F 0.1 °C |
Temperature, Relative Humidity |
| Moisture Content | Humidity Ratio ("Grains") |
.3gpp
.4g/kg |
0.1 gpp
0.01 g/kg |
.Temperature, Relative Humidity Pressure |
| Probability of Ignition (PIG) |
PIG Accuracy dependent on proximity of inputs to reference table steps. |
10% |
Temperature, Relative Humidity |
| THI (NRC) |
1.5 °F
0.8 °C |
0.1 °F
0.1 °C |
Temperature, Relative Humidity |
| THI (Yousef) |
2.3 °F
1.3 °C |
0.1 °F 0.1 °C |
Temperature, Relative Humidity |
| Relative Air Density |
0.3% |
0.1% |
Temperature, Relative Humidity Pressure |
| Wet Bulb Temperature - Psychrometric |
3.2 °F
1.8 °C |
0.1 °F
0.1 °C |
Temperature, Relative Humidity Pressure |
| Wet Bulb Temperature – Naturally Aspirated (NWB TEMP) |
1.4 °F
0.8 °C |
0.1 °F
0.1 °C |
Wind Speed, Temperature Globe Temperature, Relative Humidity, Pressure |
| Wind Chill |
1.6 °F
0.9 °C |
0.1 °F
0.1 °C |
Wind Speed, Temperature |