About the Kestrel 3550AG Pocket Delta T Crop Spraying Weather Meter

Kestrel 3550AG Spraying Weather Meter – Designed for Accurate Crop Spraying Conditions – USA-Made, Waterproof, Floating, Bluetooth-Enabled with Delta-T, Wind Speed, Temperature & More

The Kestrel 3550AG Spraying Weather Meter is a top-tier, USA-made weather meter designed specifically for the agricultural industry, enabling farmers and applicators to accurately assess crop spraying conditions and ensure effective, safe applications. Whether you're measuring wind speed, temperature, humidity, wind chill, or Delta-T, this meter helps you make informed decisions for optimal spraying. The Kestrel 3550AG also provides Bluetooth connectivity, allowing for seamless data logging, record-keeping, and drift management in real-time.

Perfect for Agricultural Spraying and Drift Management

The Kestrel 3550AG Spraying Weather Meter is designed to meet the specific needs of agricultural professionals. By providing critical data on wind speed, temperature, humidity, and Delta-T, it helps you ensure safe and effective crop spraying. With features like Bluetooth connectivity, waterproof construction, and drift management tools, the Kestrel 3550AG is a reliable companion for managing spraying conditions, tracking weather data, and optimizing your spraying operations.

Features

Comprehensive Weather Measurements: The Kestrel 3550AG provides critical weather data including wind speedcurrent wind speedaverage wind speedmaximum wind guststemperaturebarometric pressurerelative humiditywind chillheat stress indexdew point temperaturewet bulb temperature (psychrometric)altitude (barometric), and temperature-humidity index (THI). This information is essential for assessing spraying conditions and ensuring safety during pesticide, herbicide, or fungicide applications.

Delta-T for Crop Spraying: Delta-Tis a vital factor for determining optimal crop spraying conditions. This feature helps applicators assess whether the environmental conditions are suitable for effective spraying and minimizing the risk of drift. By factoring in temperatureand humidity, the Kestrel 3550AGensures you stay within safe spraying guidelines and select the best nozzle for the job.

Bluetooth Connectivity: The Kestrel 3550AG comes with Bluetooth technology, enabling you to sync data with your mobile device or other compatible apps. This makes it easy to record and timestamp weather data, keeping track of environmental conditions throughout your spraying activities and simplifying your record-keeping process for compliance and reporting.

Drift Management: With real-time data on wind speed and Delta-T, the Kestrel 3550AG helps you manage drift during crop spraying. By understanding wind conditionsand humidity, you can adjust your spraying technique to reduce off-target drift, protecting nearby crops, waterways, and sensitive areas.

Waterproof & Floats: Designed to withstand tough outdoor conditions, the Kestrel 3550AG is waterproof and floats if dropped in water, making it an ideal tool for spraying in variable weather conditions, on boats, or in wet environments.

Built to Last – Made in the USA: The Kestrel 3550AG is designed and built in the USA to provide durability, accuracy, and reliability. It’s the trusted choice for professionals in agriculture, including those working in the field or handling crop spraying operations.

Customer Satisfaction: Rated 5.00 out of 5 stars from 4 reviews, the Kestrel 3550AG is highly regarded for its accuracy, ease of use, and reliability in field conditions. Customers appreciate how the meter aids in crop spraying and drift management, with one customer stating it’s helped keep their sprays on target and another praising its Bluetooth features for record-keeping.

5-Year Manufacturer's Warranty: The Kestrel 3550AG comes with a 5-year manufacturer’s warranty, ensuring you receive a long-lasting, high-quality product you can rely on for years to come.

Easy to Use: With a user-friendly interface and three-button operation, the Kestrel 3550AGmakes it easy to gather the weather data you need, whether you're working on a farm, ranch, or in the field.

Certificate of Conformity: Each Kestrel 3500 includes a certificate of conformity, confirming that it meets high standards of quality and provides precise, accurate measurements.

Data Hold Mode: The Hold Mode is helpful for capturing measurements when you're unable to view the display in real-time.

High-contrast monochrome LCD display: Easily readable in direct sunlight.

User-Replaceable Impeller: Every Kestrel Impeller is tested at high and low speeds. The impeller is easily replaced if needed.

Slip-On Protective Cover: Keep your Kestrel protected when not in use with a hard cover that simply slides up the lanyard and over the Kestrel.

Measures
  • Wind Speed
  • Current Wind Speed
  • Average Wind Speed
  • Maximum Wind Gust
  • Temperature
  • Barometric Pressure
  • Relative Humidity
  • Wind Chill
  • Heat Stress Index
  • Dew Point Temperature
  • Wet Bulb Temperature (Psychrometric)
  • Temperature-Humidity Index (THI)
  • Altitude (Barometric)
  • Delta-T
  • Wind Direction
  • Bluetooth
What else is included?
  • (1) CR2032 Lithium Battery
  • Instructions
  • Lanyard
  • Certificate Of Conformity (Spec Sheet)
  • Protective Cover - Hard Slip-on
Downloads

Kestrel Instruments

Designed and Built in the USA. Kestrel Instruments are known for their accuracy, toughness, and reliability in the field. Trusted by professionals worldwide for precision weather measurement and environmental data logging.

FAQs

What makes Kestrel meters different from other weather instruments?

Kestrel meters combine rugged durability, precision engineering, and field-proven reliability in a compact design. Built for professional use in harsh environments, they deliver accurate real-time data for weather monitoring, environmental research, and outdoor operations. Unlike consumer-grade instruments, Kestrel meters are engineered to withstand extreme conditions while maintaining measurement accuracy that professionals depend on. Kestrel instruments are trusted by meteorologists, researchers, outdoor enthusiasts, and industrial teams worldwide for their consistent performance and dependable results in the field.

What warranty coverage do your Kestrel Instruments include, and what is not covered?

Kestrel Instruments include a full 5-year limited lifetime warranty against defects in materials and workmanship under normal use. Coverage includes the meter body, display, and internal components. The warranty does not cover damage from misuse, neglect, unauthorized repair, water immersion beyond rated specifications, battery leakage, or wear from normal operation. Accidental drops, extreme temperature exposure, and chemical exposure are also excluded. For specific coverage details and warranty registration, please contact our support team or consult your product documentation.

What makes Kestrel meters suitable for professional field work?

Kestrel meters are engineered for demanding field conditions with rugged construction, precision sensors, and reliable performance in extreme environments. Built to withstand harsh weather, dust, and impact, they deliver accurate environmental data in real-time—whether you're monitoring livestock conditions, conducting agricultural research, or managing outdoor operations. Their compact design, intuitive interface, and long battery life make them practical tools for professionals who need dependable measurements without compromise.

What is your shipping policy?

We offer worldwide shipping with competitive rates calculated at checkout. Orders typically ship within 1-2 business days. Domestic US orders arrive in 3-7 business days via standard carriers; international delivery times vary by destination, typically 7-21 business days. All orders include tracking information. We partner with UPS, FedEx, and USPS to ensure reliable delivery of your precision instruments. For expedited options or specific shipping questions, contact our support team see our estimated delivery dates offered at checkout for each shipping selection.

Who manufactures Kestrel Instruments products and what is your company background?

Kestrel Instruments are manufactured by Nielsen-Kellerman, a leader in precision environmental measurement based in Pennsylvania, USA. Our partnership combines Nielsen-Kellerman's 40+ years of engineering expertise with Extreme Meters' commitment to delivering rugged, field-tested instruments to professionals worldwide. Together, we ensure every meter meets the highest standards for accuracy and durability.

What is your return policy?

We offer a 45-day return window from the date of purchase. Items must be unused, in original packaging, and in resalable condition. Return shipping is the customer's responsibility unless the item arrived damaged or defective. Once we receive and inspect your return, refunds are processed within 5-7 business days. For international orders, please contact our support team to discuss return options, as duties and shipping costs may apply. Damaged or defective items are eligible for replacement or full refund at no cost.

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