Kestrel 3550AG Spraying Weather Meter

Avoid spray drift and maximise application results with this portable and connected handheld weather meter. Off-target pesticide drift can not only cause damage to nearby vulnerable crops but also pose a serious threat to people, livestock, wildlife, and the surrounding community.

Farmers put themselves and their operations at risk every time they spray a field without documenting the wind speed and environmental conditions. The 3550AG with Bluetooth Connectivity makes it easy to instantly capture and log accurate, field-level weather data with just one-click.

No matter the size of your operation – effective herbicide and pesticide application is critical to your success. Prevent drift, eliminate waste, ensure safety and effectiveness – it all starts with monitoring your conditions.

Impeller:

Every Kestrel Meter features a large, 1” impeller mounted on a sapphire jewel bearing, which means it starts rotating with the slightest puff of air – 0.48 km/h to be exact! This patented impeller is user-replaceable by simply pushing it out with your thumbs, which means it can easily be replaced if it is damaged or worn. The measurements from the wind impeller are taken magnetically. The impeller is not glued or attached to the unit. Because every new impeller is calibrated in the wind tunnel at the USA factory, if your application demands regular calibration, simply pop in a new impeller and the Kestrel Wind Meter is restored to like-new factory calibration standards. The Kestrel 3550FW can easily be switched between °F, °C, mph, km/h, ft/min, m/s, knots and Beaufort.

Features and Functions:

– Hard slip-on protective cover with sure-grip overmolding
– 3-Button Control
– Backlight blue white
– Data hold function
– Real-time clock
– Date & Time
– Large easy-to-read display – high contrast, sunlight readable monochrome LCD – with white backlight
– Quick-response, external thermistor
– Patented user-replaceable impeller
– Patented Quick-Response RH (Relative Humidity) Sensor
– Humidity sensor can be recalibrated in the field with our Relative Humidity Calibration Kit
– High precision pressure sensor
– Temperature Sensor (Patented External Isolated)
– Wide range of wind speeds and low startup speed
– Minimum/Maximum/Average Reading
– Reliable, portable, and easy to use
– Drop-Tested to MIL-STD-810G
– Waterproof to IP67 Standards (Can be submerged up to 3’/1M for up to 30 minutes)
– Innovative design for stability and accuracy in abrupt condition changes
– All instruments and accessories are completely assembled in the USA

Measurement	Accuracy	Resolution	Sensors Employed
Altitude	typical: 7.2 m from 750 to 1100 mBar max: 14.7 m from 300 to 750 mBar	1 m	Pressure, User Input (Reference Pressure)
Barometric Pressure	0.07 inHg 2.4 hPa\|mbar 0.03 PSI	0.01 inHg 0.1 hPa\|mbar 0.01 PSI	Pressure, User Input (Reference Altitude)
Delta T	1.8 °C	0.1 °C	Temperature, Relative Humidity, Pressure
Dew Point	1.9 °C 15-95% RH. Refer to Range for Temperature Sensor	0.1 °C	Temperature, Relative Humidity
Heat Index	4.0 °C	0.1 °C	Temperature, Relative Humidity
THI (NRC)*	0.8 °C	0.1 °C	Temperature, Relative Humidity
THI (Yousef)*	1.3 °C	0.1 °C	Temperature, Relative Humidity
Wet Bulb Temperature – Psychrometric	1.8 °C	0.1 °C	Temperature, Relative Humidity, Pressure
Wind Chill	0.9 °C	0.1 °C	Wind Speed, Temperature

Kestrel 3550FW Fire Weather Meter

Fighting wildfires and protecting lives, property, and communities demands accurate weather monitoring and the ability to quickly share data to maximize crew safety and deploy resources. The Kestrel 3550FW paired with the free Kestrel app puts powerful tools for monitoring, logging, and sending important weather information for making the most informed decisions for fire management strategy.

Pocket-sized, rugged, waterproof, affordable, easy to use, and equipped with data logging capabilities and wireless data retrieval for monitoring and reporting, the Kestrel 3550FW is your trusted weather guide for fire management and safety.

Impeller:

Kestrel 3550FW Features and Functions:

– Hard slip-on protective cover with sure-grip overmolding
– 3-Button Control
– Backlight blue white
– Data hold function
– Real-time clock
– Date & Time
– Digital Compass
– Large easy-to-read display – high contrast, sunlight readable monochrome LCD – with white backlight (or soft red backlight on the NV model)
– Quick-response, external thermistor
– Patented user-replaceable impeller
– Patented Quick-Response RH (Relative Humidity) Sensor
– Humidity sensor can be recalibrated in the field with our Relative Humidity Calibration Kit
– High precision pressure sensor
– Temperature Sensor (Patented External Isolated)
– FREE Kestrel LiNK Software for iOS and Android*
– Wide range of wind speeds and low startup speed
– Minimum/Maximum/Average Reading
– Reliable, portable, and easy to use
– Drop-Tested to MIL-STD-810G
– Waterproof to IP67 Standards (Can be submerged up to 3’/1M for up to 30 minutes)
– Innovative design for stability and accuracy in abrupt condition changes
– All instruments and accessories are completely assembled in the USA

Measurement	Accuracy	Resolution	Sensors Employed
Altitude	typical: 7.2 m from 750 to 1100 mBar max: 14.7 m from 300 to 750 mBar	1 m	Pressure, User Input (Reference Pressure)
Barometric Pressure	0.07 inHg 2.4 hPa\|mbar 0.03 PSI	0.01 inHg 0.1 hPa\|mbar 0.01 PSI	Pressure, User Input (Reference Altitude)
Delta T	1.8 °C	0.1 °C	Temperature, Relative Humidity, Pressure
Dew Point	1.9 °C 15-95% RH. Refer to Range for Temperature Sensor	0.1 °C	Temperature, Relative Humidity
Heat Index	4.0 °C	0.1 °C	Temperature, Relative Humidity
THI (NRC)*	0.8 °C	0.1 °C	Temperature, Relative Humidity
THI (Yousef)*	1.3 °C	0.1 °C	Temperature, Relative Humidity
Wet Bulb Temperature – Psychrometric	1.8 °C	0.1 °C	Temperature, Relative Humidity, Pressure
Wind Chill	0.9 °C	0.1 °C	Wind Speed, Temperature