• Pocket Weather Meter Kestrel - 3500
NK3500-000

Pocket Weather Meter Kestrel - 3500

  • Wind speed, temperature, humidity, and pressure meter
  • Calculates relative humidity, altitude, barometric pressure, heat index
  • Data hold feature, clock and backlit display for night time use

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Measure environmental conditions quickly and accurately


Features

  • Real-time clock
  • Protective cover with sure-grip overmolding
  • Data hold function
  • Large easy-to-read display with backlight
  • Waterproof and floats
  • Lanyard and battery included
  • 5 year warranty


Know your condition

  • Measure environmental conditions quickly and accurately
  • Forecast weather with pressure trend indicator
  • Reliable, portable and easy to use

 

Quality by design

  • All instruments and accessories are completely assembled in the USA
  • Innovative humidity sensor designed for stability and accuracy in abrupt condition changes
  • Thermally adjusted humidity sensor
  • Patented user-replaceable impeller
  • Quick response, external thermistor
  • High precision pressure sensor
MeasurementUnitsAccuracyRange
Current, Max and Avg Wind Speedm/s, km/hr, mph, fpm, kts, Beaufort Force±3% of reading
or ±0.1 m/s
0.3 to 40 m/s
(0.7 to 89 mph)
Temperature, Wind Chill, Heat Stress, Dewpoint°C, °F±1°C (±2°F)-29 to 70°C
(-20 to 158°F)
Relative Humidity%± 3% or scale5 to 95%
PressurehPa, inHg± 3 hPa870.0 to 1080.0 hPa
(25.70 to 31.90 inHg)
Altitudefeet, meters± 30 meters (at standard
atmospheric conditions)
-500 to 9000 meters
(-1500 to 30000 feet)
 
Display Update1 second
Display SizeReflective 3 1/2 digit LCD, 9 mm (0.36 in.) digit height
Off-Axis Wind Speed Accuracy-1% @ 5º off-axis; -2% @ 10º; -3% @ 15º
Calibration Drift< 2% after 100 hours use at 7 M/S (~14 KT, 25 KM/H, 16 MPH or 1,400 FPM)
Environmental SealingElectronics enclosure IP67 - water resistant to 1 m. (3 ft.)
Shock ResistanceDrop tested to 2 m. (6 ft.)
Auto Shutdown45 minutes after last key press
BatteryUser-replaceable CR2032 coin cell; typical life, 400 hrs
Impeller25 mm (1 in.) diameter, sapphire bearings, light weight; user-replaceable without tools
Temperature SensorHermetically sealed precision thermistor
Pressure SensorMonolithic Silicon Piezoreisitive sensor
DimensionsUnit: 122 x 42 x 20 mm (4.8 x 1.7 x 0.8 in.)
Cover: 122 x 46 x 26 mm (4.6 x 1.8 x 1.1 in.)
WeightUnit: 2.3oz (65gr)
Cover: 1.3oz (37gr)
Operating TemperatureLCD readability is lost above 50ºC (122ºF) and below -15ºC (5ºF). Accurate readings may be taken beyond these temperature limits by exposing the unit for the minimum time necessary to take and record measurement.
Storage TemperatureRecommended -20ºC to 80ºC (-4ºF to 176ºF)
Temperature LimitationsThe Kestrel temperature sensor is able to measure temperatures as low as -30C (-22F) and as high as 70C (158F). The Kestrel is able to display wind chill measurements lower than -30C, depending on wind conditions. It is also able to display heat index measurements above 70C, depending on humidity conditions. The Kestrel display will not function if the display itself gets below -15C. However, if the unit is kept in a pack or pocket or other warm area, the display itself should not get this cold.
Patents5,783,753; 5,939,645; Other patents pending.
Certification
  • Wind speed and temperature measurements are tested at the factory before packaging. Factory certification is available for additional fee.
  • Product is CE certified.
WarrantyStandard 5 year warranty covers parts and labor.