Kestrel 3500 Pocket Weather Meter

Split-second decisions require no guesswork; get conditions quickly.

₱19.99

Ships in 1 business day
Free Shipping in the USA
Returnable until Jan 31, 2025

Measures

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

Includes

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

Warranty

5 year manufacturers warranty.

US Manufacturing

The entire Kestrel line is designed and built in the USA. No other handheld weather meter is. Some electronic components have to be sourced overseas these days, but Kestrel buys American wherever possible. Kestrel believes US manufacturing is the only way to ensure that every Kestrel will do its job right. Kestrel believes it’s important to do its part to keep manufacturing alive and well in the US.

Government / Education Pricing Available

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:

Kestrel 3500 Manual and Complete Sensor Specifications

Description

Split second decisions in the field leave no time for guesswork.

Quickly changing weather conditions require constant, immediate updates. Measure wind speed, temperature, relative humidity, dew point and wet bulb temperature with the Kestrel 3500. 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.Kestrel 3500 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 (Blue white)
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 Batteries
User-Replaceable Impeller
Waterproof & Floats
Designed and built in the USA

Payment & Security

Payment methods

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Kestrel 3500

The Kestrel 3500 I ordered from Extreme Meters arrived quickly. It is very intuitive and user friendly. Different data fields are easy to navigate. I also really like the protective hard case and lanyard that it comes with, it is durable, while being compact and easy to carry.

I had been wanting this Kestrel 3500 for a while. Extreme Meters’ price was as good as I’ve found so I ordered from them. It shipped immediately and was in my hands in just a couple of days. As an amateur naturalist it’s important for me to document accurate weather conditions when recording species that I find in the field. The 3500 gives me all the pertinent data that I need.

Best portable weather instrument I have owned and I’ve tried a few.

Unit is easy to carry, easy to view and easy to operate. The short description that precedes each measurement display is very handy.

Love carrying it on my daily dog walks.

Of course who doesn’t like Kestrel meters?! Extreme Meters shipped it right out, it was the correct meter and of course works flawlessly! Thank you so much for getting my meter out so quickly.

Carson