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Kestrel 3500NV Pocket Weather Meter with NV Backlight

Kestrel  |  SKU: 0835NV  |  Barcode: 730650035014

$209.00 USD $248.00 USD

Measures

  • Wind Speed
  • Current Wind Speed
  • Average Wind Speed
  • Maximum Wind Gust
  • Temperature
  • Barometric Pressure
  • Relative Humidity
  • Pressure Trend
  • Wind Chill
  • Heat Stress Index
  • Dew Point Temperature
  • Altitude (Barometric)
  • Wet Bulb Temperature (Psychrometric)

Shipping

  • Ships within 24 hours
  • Free Shipping in the USA
  • Discounted Global Shipping
  • 45 Day Easy Returns (Free in the USA)

Includes

  • (1) CR2032 Lithium Battery
  • Instructions
  • Lanyard
  • Certificate Of Conformity (Spec Sheet)
  • Protective Cover - Hard Slip-on

Warranty

5 year manufacturers warranty.

State Sales Tax Information

State sales tax not charged / collected on orders outside of Pennsylvania

Sensor Specifications

Sensor Specifications

Wind Speed

Units of Measure: mph | kt | B | m/s | ft/min / km/h 
Specification Range:
  • 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 F/S*
Operational Range:
  • 0.6 to 60.0 m/s
  • 118 to 11,811 ft/min
  • 2.2 to 216.0 km/h
  • 1.3 to 134.2 mph
  • 1.2 to 116.6 knots
  • 0 to 12 B*
  • 2-196.9 F/S*
Resolution:
  • 0.1 m/s
  • 1 ft/min
  • 0.1 km/h
  • 0.1 mph
  • 0.1 knots
  • 1 B
Accuracy (+/-): Larger of 3% of reading, least significant digit or 20 ft/min
Notes: 1 inch|25 mm diameter impeller with precision axle and low-friction Zytel® bearings. Startup speed stated as lower limit, readings may be taken down to 0.4 m/s | 79 ft/min | 1.5 km/h | .9 mph | .8 kt after impeller startup. Off-axis accuracy -1% @ 5º off-axis; -2% @ 10º; -3% @ 15º. Calibration drift < 1% after 100 hours use at 16 MPH | 7 m/s. Replacement impeller (PN-0801) field installs without tools (US Patent 5,783,753). Wind speed calibration and testing should be done with triangle on impeller located at the top front face of the Kestrel. *F/S only in Ballistics units. Beaufort not available in Ballistics units.

Ambient Temperature

Units of Measure: Fahrenheit, Celsius
Specification Range:
  • -20.0 to 158.0 °F
  • -29.0 to 70.0 °C
Operational Range:
  • 14.0.0 to 131.0 °F
  • -10.0 to 55.0 °C
Resolution:
  • 0.1 °F
  • 0.1 °C
Accuracy (+/-):
  • 0.9 °F
  • 0.5 °C
Notes: Hermetically sealed, precision thermistor mounted externally and thermally isolated (US Patent 5,939,645) for rapid response. Airflow of 2.2 mph|1 m/s or greater provides fastest response and reduction of insolation effect. Calibration drift negligible. Thermistor may also be used to measure temperature of water or snow by submerging thermistor portion into material -- remove impeller prior to taking submerged measurements and ensure humidity sensor membrane is free of liquid water prior to taking humidity-based measurements after submersion.

Pressure

Units of Measure: inHg, hPA, mb
Specification Range:
  • 25°C/ 77°F
  • 750-1100 hPa|mbar
  • 22.15-32.48 inHg
  • 10.88-15.95 PS
Operational Range:
  • 0.30 to 48.87 inHg
  • 10.0 to 1654.7 hPa|mbar
  • 0.14 to 24.00 PSI
  • 14.0 to 131.0 °F -10.0 to 55.0 °C
Resolution:
  • 0.1 hPa|mbar
  • 0.01 inHg
  • 0.01 PSI
Accuracy (+/-):
  • 1.5 hPa|mbar
  • 0.044 inHg
  • 0.022 PSI
Notes: Monolithic silicon piezo-resistive pressure sensor with second-order temperature correction. Between 1100–1600 mbar, unit will operate with reduced accuracy. Sensor may not operate above 1600 mbar and can be damaged above 6,000 mbar or below 10 mbar. Calibration drift is negligible for the life of the product.

Relative Humidity

Units of Measure: %
Specification Range: 5 to 95% 25°C non-condensing
Operational Range: 0 to 100% 
Resolution: 0.1 %RH
Accuracy (+/-): 3%RH
Notes: To achieve stated accuracy, unit must be permitted to equilibrate to external temperature when exposed to large, rapid temperature changes and be kept out of direct sunlight. Calibration drift is typically less than ±0.25% per year.

Calculated Measurements

 Wind Chill

Accuracy (+/-):
  • 1.6 °F
  • 0.9 °C
Resolution:
  • 0.1 °F
  • 0.1 °C
Sensors employed:
  • Wind Speed
  • Temperature

Barometric Pressure

Accuracy (+/-):
  • 0.07 inHg
  • 2.4 hPa|mbar
  • 0.03 PSI
Resolution:
  • 0.01 inHg
  • 0.1 hPa|mbar
  • 0.01 PSI
Sensors employed:
  • Pressure
  • User Input (Reference Altitude)

Altitude

Accuracy (+/-):
  • typical: 23.6 ft/7.2 m
  • from 750 to 1100 mBar
  • max: 48.2 ft/14.7 m
  • from 300 to 750 mBar
Resolution:
  • 1ft
  • 1m
Sensors employed:
  • Pressure
  • User Input (Reference Pressure)

Dew Point

Accuracy (+/-):
  • 3.4 °F
  • 1.9 °C
  • 15-95% RH.
  • Refer to Range
    for Temperature Sensor
Resolution:
  • 0.1 °F
  • 0.1 °C
Sensors employed:
  • Temperature
  • Relative Humidity

Wet Bulb Temperature - Psychrometric

Accuracy (+/-):
  • 3.2 °F
  • 1.8 °C
Resolution:
  • 0.1 °F
  • 0.1 °C
Sensors employed:
  • Wind Speed
  • Temperature

Heat Index

Accuracy (+/-):
  • 7.1°F
  • 4.0°C
Resolution:
  • 0.1 °F
  • 0.1 °C
Sensors employed:
  • Temperature
  • Relative Humidity

Downloads:

Government / Education Pricing Available

Description


Measuring conditions quickly and accurately is essential in the field, making reliable data vital.

Quickly changing weather conditions require constant, immediate updates. Measure wind speed, temperature, relative humidity, dew point and wet bulb temperature with the Kestrel 3500NV.

Many Kestrel users need to know everything that the weather is doing, but don’t need to log the data. At the press of a button, get all the relevant conditions you need to enable yourself to shift strategies, reduce risk and ensure safety.

While the weather can dictate the comfort level of individuals working or playing outside, it plays an even bigger part in many professionals’ jobs. Irrigation professionals use the Kestrel 3500 to ensure they are irrigating efficiently and the water they are dispersing is actually hitting their intended target, and not evaporating or blowing away. On construction sites Kestrel users are preventing plastic shrinkage cracks and curing concrete more effectively with their Kestrel 3500.

Night Vision Preserving Backlight:

The Kestrel 3500NV in Olive Drab with NV has a night-vision preserving backlight which helps users to sustain natural night vision. The NV's backlight incorporates an optical filter to reduce overall brightness and minimize blue and green spectrum light to preserve night vision. Additionally, NV backlights are also much dimmer than a standard backlight, making it more difficult to detect with the naked eye in night operations. This backlight appears soft greyish pink, not red, and is still in the visible spectrum, so is not compatible with night-vision equipment.

It takes 30 to 45 minutes for the average eye to adapt to darkness and maximize night vision. Even a short burst of white, yellow, green or blue light “bleaches out” the rod cell photoreceptors in the eye and causes night blindness until the entire adaptation process can take place again. Light in the red spectrum does not cause this “bleaching out”, preventing night blindness and night vision fatigue.

Features:
  • Simple 3-Button Control
  • High Contrast, Sunlight Readable Monochrome LCD Display
  • Backlight (Night Vision Preserving)
  • Temperature Sensor (Patented External Isolated)
  • CR2032 Coin Cell Battery (Average Life 300 Hours)
  • Data Hold Function
  • Drop-Tested to MIL-STD-810G
  • Waterproof to IP67 (3'/1M for 30 minutes)
  • Kestrel Certificate of Conformity
  • Neck Lanyard
  • Patented Impeller and Sensor Technology
  • Slip-On Protective Cover
  • Time of Day
  • User-Replaceable Battery
  • User-Replaceable Impeller
  • Waterproof and Floats
  • Designed and built in the USA
  • NSN# 6660016540064

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Kestrel 5500 Weather Meter - ExtremeMeters.com

Kestrel Instruments

Quality designed and durably built in the U.S.A. Every Kestrel found in our store is tested for accuracy, includes a full 5 year global factory warranty and comes with a certificate of conformity.

Customer Reviews

Based on 2 reviews
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blaine j.

simple, easy to use,has all the features I need

A
Andrew B.

works well on the water where i work . makes my life easy

Kestrel 3500NV Pocket Weather Meter with NV Backlight - ExtremeMeters.com
Kestrel

Kestrel 3500NV Pocket Weather Meter with NV Backlight

$209.00 USD $248.00 USD
Measuring conditions quickly and accurately is essential in the field, making reliable data vital. Quickly changing weather conditions require constant,...

Measures

Wind Speed, Current Wind Speed, Average Wind Speed, Maximum Wind Gust, Temperature, Barometric Pressure, Relative Humidity, Pressure Trend, Wind Chill, Heat Stress Index, Dew Point Temperature, Altitude (Barometric), Wet Bulb Temperature (Psychrometric)
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