Kestrel 4300 Construction Weather & Environmental Meter

No more guessing or using inaccurate weather data from miles away plus no more struggling through ACI's complex evaporation rate calculations by hand.
This model is being discontinued and replaced with the Kestrel 5200 Professional Environmental Meter.

Availability: In stock


Kestrel 4300 Construction Weather & Environmental Meter Overview

For years construction professionals have been using Kestrel Weather & Environmental Meters to monitor the weather on the job site. Now NK has partnered with industry experts to develop a customized Kestrel instrument for construction professionals who place concrete. Using the Kestrel 4300 alerts you to conditions in real-time, using the actual environmental conditions on your job site during your pour. No more guessing or using inaccurate weather data from miles away PLUS no more struggling through ACI’s complex evaporation rate calculations by hand! The Kestrel 4300 Construction Weather & Environmental Meter measures and displays evaporation rate — a function of relative humidity, temperature and wind speed. Evaporation rate is a critical environmental indicator that concrete contractors use to ensure they avoid plastic shrinkage cracks in concrete installations especially concrete flatwork. Plastic shrinkage cracks occur when the surface of the concrete dries too quickly and shrinks before the bed has cured enough to resist cracking. This is especially relevant in specialty applications like decorative concrete, Ready Mix Concrete (RCM) and Tilt-up concrete. Plastic shrinkage cracks can be prevented by properly assessing the weather and the fresh concrete conditions. Previously, construction contractors used a Kestrel Meter to measure the relevant conditions, then referenced an American Concrete Institute chart to calculate the evaporation rate. The Kestrel 4300 Construction Weather & Environmental Meter does the work for them! The user simply enters the concrete temperature (obtained via an infrared thermometer or probe thermometer*) and the 4300 calculates the evaporation rate instantly. In addition to evaporation rate, the Kestrel 4300 remains the perfect rugged all-purpose construction weather tool, measuring and logging the following relevant weather conditions right where the workers and equipment are operating. For the best accuracy, use the Kestrel's convenient averaging mode to average the evaporation rate over the recommended 6-10 seconds. Many construction applications require documentation of conditions, which is quick and easy with the Kestrel PC Interface and accompanying software. Use the Kestrel 4300's 3600 data-point log to document that work was done during the appropriate conditions, then upload the data to a PC with the Kestrel PC Interface. The Kestrel Communicator software makes long-term storage, in-depth analysis and detailed charting of stored data a breeze.

Includes: Soft Carry Pouch, Neck Lanyard, 2 AAA Lithium Batteries (average life 400 hours) and Kestrel Certificate of Conformity.

Kestrel Weather & Environmental Meters are designed & manufactured in the U.S.A and are backed by our 5-year warranty. Innovatively designed for stability and accuracy in abrupt condition changes. Rugged and durable Kestrels are drop tested, waterproof and designed to float if dropped in water.

 NOTE: Currently our Bluetooth Classic units are not MAC/Apple compatible. 

Tips For Taking Accurate Measurements

 Models and SKUs:

  • Kestrel 4300 - Part # 0843 
    • NSN: 6660015193704
  • Kestrel 4300 with Bluetooth - Part # 0843B
**For Government Pricing, contact us at 800-784-4221**


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