About the Kestrel 5100 Racing Weather Meter

Ensure critical dial-in or tuning decisions are accurate with Kestrel 5100 Racing Weather Meter.

The compact, portable design makes this unit easy to take right to the track

Kestrel 5100 Meter at the trackThe Kestrel 5100 is just as accurate, reliable and user-friendly as the original Kestrel 4250. The Kestrel 5100 measures moisture content in grains, air density, relative air density, humidity and other critical factors. Count on it for the information you need to make perfect ET predictions and performance-maximizing tuning and jetting decisions. The compact, portable design makes this unit easy to take right to the track – exactly where you need to get the most accurate and race-relevant measurements. Pair it with the optional Kestrel Vane Mount for hands-free measurements logged over the course of the day. For maximum functionality, choose a Kestrel 5100 with LiNK to transmit live measurements to the Kestrel LiNK app on your iOS or Android device up to 100’ away (line of sight).

Affordable, accurate, portable and reliable, Kestrel meters have been proven at race tracks everywhere. Put the weather on your side – put a Kestrel in your toolbox.

The 5100 with LiNK Bluetooth Connectivity, gives you the option to transfer data wirelessly to an iOS (iPhone, iPad) device or Android smartphone or tablet when within range using the appropriate app (See Below). Also with the 5100 with LiNK Meter, you can transfer data wirelessly to a Windows or Mac computer using the optional Kestrel Bluetooth USB Dongle.

Who's using the Kestrel 5100?
  • Bracket Racers
  • Drag Racers
  • Pit Crews
  • Professional Auto Racing Teams
      Features
      • Measures moisture content (grains), air density, relative air density (RAD), relative humidity, temperature, barometric pressure, wind speed and much more. 14 measurements in all.
      • Easy to read, high resolution screen (standard and NV backlit).
      • Time & date
      • Waterproof & floats
      • Exterior temperature, humidity & pressure sensors for fast & accurate readings
      • Humidity sensor can soon be calibrated in the field via cable or Dongle.
      • Min, Max & Average values
      • Automatically store measurements, when powered on or off
      • Manually store measurements with the press of a button
      • Customizable data storage - 10,000 data points
      • Graph & recall trends
      • Customize screens to display user-selected measurements
      • Data charting
      • Data upload to iOS & Android phones & tablets
      • Data upload to Windows or Mac computers with optional USB Data Cable
      • Data upload to Windows & Mac computers via wireless Bluetooth (LiNK Enabled Meters only with the optional Kestrel Dongle)
      • Languages: English, French, Spanish, German & Italian
      • User-replaceable impeller
      • impeller cover allows use of other functions & protecting the impeller
      • All instruments and accessories are completely assembled in the USA
      Measures
      • Wind Speed
      • Current Wind Speed
      • Average Wind Speed
      • Maximum Wind Gust
      • Temperature
      • Altitude (Barometric)
      • Barometric Pressure
      • Pressure Trend
      • Dew Point Temperature
      • Wet Bulb Temperature (Psychrometric)
      • Relative Humidity
      • Wind Chill
      • Density Altitude
      • Relative Air Density
      • Air Density
      • Moisture Content (Grains)
      • Heat Stress Index
      • Bluetooth (LiNK model)
      What else is included?
      • (1) AA Lithium Battery
      • Instructions
      • Protective Draw String Pouch
      • Lanyard
      • Certificate Of Conformity (Spec Sheet)
      Downloads | Manuals | Specifications

      Dimensions:

      • 5.0 x 1.8 x 1.1 in. / 12.7 x 4.5 x 2.8 cm
      Weight:
      • 3.6 Ounces / 102 Grams

      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.

      Didn’t find your answer?

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      • 5 stars: 6 (67%)
      • 4 stars: 2 (22%)
      • 3 stars: 1 (11%)
      • 2 stars: 0 (0%)
      • 1 star: 0 (0%)
      R
      Ronald Kuba (Slovakia)
      Standard Non-LiNK

      Everything went smoothly, great product.

      A
      Andreas S.

      Top Gerät und schnelle Lieferung.

      M
      Mike H.

      Ordered the wrong one (without link) seamless exchange and great customer service.

      Thank You,
      Mike

      T
      Thomas E.

      Product as expected, knew what I sas buying. Was plesantly surprised by the very short delivery and shipping time.

      Thank you for the review! We do our best to ship our customers orders out fast.

      A
      Alexander P.

      DISPATCHED VERY QUICKLY AND WELL PACKED- EXCELLENT COMPANY TO DO BUSINESS WITH!

      D
      Dennis C.

      I have to learn more on using this for a tool. I do think it will help on getting car to run in different weather settings. Probably should have paid extra for option letting me download and save info. Can it be added to my version?

      Hi, The standard (non-LiNk) models can download data to a PC or a Mac only with the Kestrel USB Data Transfer Cable which can be found in our Kestrel Accessories section. If you want the LiNK model, we can send you a pre-paid return label for the meter you have. You can purchase the LiNK version anytime. The LiNK model can transfer data via Bluetooth to a smartphone along with the Kestrel App. The LiNK model can use the Kestrel Data Transfer Cable as well. If you have any other questions please ask!
      Mitch

      T
      Tom B.

      Nice instrument. A little instruction on how to use all of the information in relation to racing would be great

      E
      Ellis Groo

      Great unit I am sure but no supporting software
      I was very excited to get this. That was until I found There was no software to use with it. Including Crew Chief Pro, "Who say they do not have any time for this project" Being the replacement for the 4250 I was let down to to find would not work with any thing the 4250 did. I have searched this site on and off this week and neither or Kestrel have any usable software. They do not even have any information on how to use the download software, I could easily give more stars if the racing meter could be used for racing

      B
      Brenda W.

      I bought my husband a Kestrel 5100 Racing Weather Meter for Christmas. I had a question about my order a few days after I ordered it. The customer service email was fantastic!!! I have never had such fast service. Also my husband loves the meter!!!! it is so accurate, he Is looking forward to the racing season.

      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.