3141
Wind speed: 0.5 to 44.7 mph (0.8 to 72.0 km/h), Accuracy ±5%
Temperature: 32 to 122ºF (0 to 50ºC)
Accuracy: ± 1ºF (±0.6ºC)
Item 3145 Only - RH: 10 to 95% (Accuracy ±4%)
3145
Display Dual 3½ digit LCD with low battery and multifunction
Sensors Sapphire bearing, non-corrosive vane for air velocity;
Precision thermistor for temperature measurements
Average Mode Choice of 5 or 10 reading averaging (2 second factory
Max and Data Hold
Displays
Max recalls the highest reading; Data Hold freezes the
display
Sample time 1 reading per second for air velocity and temperature
(1 reading per 15 seconds for humidity with 2 second
updates)
Water-resistant To 3’ (1m)
Operating conditions 5 to 122oF (-15 to 50oC) / < 80% RH
Power supply Lithium battery (CR-2032 or equivalent) / 400 hour
Dimensions / Weight Instrument: 5.25 x 2.75 x 0.75” (133 x 70 x 19mm)
Measurement Units Range Resolution Accuracy
MPH 1.1 to 62.5 MPH 0.2 MPH ± (3% + 0.4 mph)
km/hr 1.8 to 100.6 km/h 0.7 km/h ± (3% + 1.4 km/hr)
Knots 1.0 to 54.3 knots 0.3 knots ± (3% + 0.6 knots)
m/sec 0.5 to 28 m/s 0.1 m/s ± (3% + 0.2 m/s)
ft/min 100 to 5500 ft/min 20ft/min ± (3% + 40 ft/min)
Beaufort force 1 to 17 BF 1 BF ± 1
Temperature 0 to 122oF 0.1oF/C ± 1.8oF (± 1oC)
Relative Humidity 10 to 95% 1% ± 5% RH
Dew Point 32 to 122 oF
(0 to 50oC)
0.1oF/C ± 3.6oF (2oC)