The Kestrel 3500 Pocket Weather Meter is the required model for anyone wanting accurate supportive weather data and barometric readings. It is a pocket-sized electronic rotating vane type of anemometer (wind meter) with built-in temperature, humidity and barometric pressure sensors. It uses high precision Zytel® bearings and a light weight impeller to provide accurate air flow measurements even at low speeds. The impeller assembly is replaceable by the user in the case of damage.

A trend arrow displays whether the pressure is rising, stable or falling, this trend is calculated over a 3-hour period. The pressure is monitored even when the Kestrel 3500 is switched off.

Wind chill and heat index are equivalent temperatures that show the user how their environment really feels. Wind chill is the combination of wind speed and temperature, while heat index is the combined effect of air temperature and relative humidity. The humidity sensor compensates for temperature changes and is designed for stability and accuracy.

The liquid crystal display has large 9mm high digits and is backlit for a clear readout in low light conditions. For users with after dark requirements, the Kestrel 3500NV, with an olive drab case, has a lower intensity red backlight to preserve night vision.

Power is from an easily replaceable standard lithium coin type cell, which will typically give up to 300 hours of operation. The instrument automatically switches off if no keys are pressed for 45 minutes.

The Kestrel 3500 Pocket Weather Meter is made from high impact injection moulded plastic and corrosion resistant materials with the electronics fully sealed. It will float if accidentally dropped into water. There is a hard cover for protection when not in use and a lanyard is provided for added security.

Kestrel 3500 measures

• Current wind speed
• Average wind speed
• Maximum wind speed
• Temperature
• Wind Chill
• Relative Humidity
• Heat Index
• Dew Point
• Wet Bulb temperature
• Barometric pressure
• Altitude

Units of measure

• kt, m/s, km/h, mph, ft/min, Beaufort
• ºC, ºF
• %
• inHg, hPa
• m, ft

Accuracy

• Speed ±3% of reading or ±0.1 m/s
• Temperature ±1ºC
• Relative humidity ±3% or scale
• Barometric pressure ±1.5hPa

Operational Range

• Speed 0.6 to 60 m/s
• Temperature -45 to +125ºC
• Relative humidity 0 to 100%
• Barometric pressure 10 to 1100hPa at 25ºC

Specification Range

• Speed 0.6 to 40 m/s
• Temperature -29 to +70ºC
• Relative humidity 5 to 95%
• Barometric pressure 750 to 1100hPa at 25ºC

Kestrel 3500 benefits: What makes a Kestrel Unique?

• Small, robust design
• 3 hour pressure trend
• Data hold function
• Real-time clock
• Large easy to read display with backlight
• Navigation made easy with prompts
• Waterproof and floats
• High precision axle and low-friction Zytel® bearings
• Replaceable impeller
• Fast response temperature sensor
• Long life lithium battery
• Includes protective cover, lanyard and battery
• 5 year warranty
• Choice of measurement units
• Yellow option: standard green backlight
• Olive drab option: low intensity red backlight for preserving night vision

Typical applications

• Agriculture – checking conditions prior to crop spraying or burning
• Aviation – gliders, para-gliders, micro-lights, parachutists and ballooning
• Construction – site safety, working conditions, working at height in cranes or access vehicles
• Education – air flow experiments, environmental studies, outdoor sports
• Heating and ventilation – air flow through fans, checking condition of filters
• Industry – air flow measurements, pollution control
• Science – aerodynamics, environmental science and meteorology
• Fire fighters – checking fire spreading hazard
• Outdoor activities – sailors, walkers, model boats/air craft, kite flyers, archery, shooting, fishing, golf & athletics

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