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Kestrel 843 4300 Construction Weather Tracker - Safety Green Kestrel Pocket Weather Meter
Authorized Dealer
The new Kestrel 4300 Construction Weather Tracker 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. more ...
Health Products > Wind and Weather Meters > Air Flow/Weather Trackers
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Kestrel 843 4300 Construction Weather Tracker - Safety Green
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Price: $259.00


In Stock - Ships within 24 hours

Optional Accessories

View Features

SKU: 843

Features

Calculates Evaporation Rate

The new Kestrel 4300 Construction Weather Tracker 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.

Helps Prevent Plastic Shrinkage Cracks

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 new Kestrel 4300 Construction Weather Tracker 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 maximum accuracy when measuring the evaporation rate:
  1. Measure the concrete temperature via an infrared or probe thermometer
  2. Enter the concrete temperature into the Kestrel
  3. Position the unit facing into the wind, 20 inches above the concrete
  4. Shade the Kestrel's thermistor (temperature sensor) so it is not in direct sunlight
  5. For the best accuracy, use the Kestrel's convenient averaging mode to average the evaporation rate over the recommended 6-10 seconds.
Documents Work Conditions

Many construction applications require documentation of conditions, which is quick and easy with the Kestrel PC Interface and accompanying software. Use the 4300's 1800 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.

Kestrel's Mini Tripod is a great companion for the 4300—it measures 15 inches tall, positioning the Kestrel 4300 20 inches above the concrete, which is ideal for measuring the conditions that contribute to plastic shrinkage cracks.

Every Kestrel is individually calibrated to NIST-traceable standards and comes with a free Certificate of Conformity. Individual NIST certificates and recalibration are also available.

Kestrel 4300 Measures
  • Evaporation rate
  • Relative humidity in %
  • Wind speed (current, average, and maximum)
  • Temperature in °F or °C
  • Dewpoint
  • Barometric pressure
  • Heat stress index
  • Wet bulb temperature
  • Windchill
  • Altitude
  • Density altitude
Kestrel 4300 Features
  • Waterproof and floats
  • Backlight for low light conditions
  • Data logger (automatic and manual)
  • Customizable data storage – 1800 data points
  • Multi-Function 3-line display
  • Convenient averaging mode
  • Data charting
  • Humidity sensor can be recalibrated in the field with our Relative Humidity Calibration Kit.
  • User-replaceable impeller
  • Flip-top impeller cover
  • Upload to a computer (with optional interface)
  • Five languages (English, French, Spanish, German, and Italian)
  • US Patent Nos. 5,783,753 and 5,939,645 and 6,257,074
  • 5-year warranty
  • Assembled in the USA
Kestrel 4300 Includes
  • Soft carry pouch
  • Neck lanyard
  • Batteries – 2 AAA
  • Kestrel Certificate of Conformity

Weight: 0.50 lb

* within the 48 continental US States



Optional Accessories
Kestrel 801 Replacement Impeller

$19.00



Replacement impeller for all Kestrel models.

Kestrel 802 RH Calibration Kit

$99.00



The RH calibration kit includes the following items:

  • three clear, sealable containers
  • one container with magnesium chloride solution
  • one container with sodium chloride solution
  • two wooden scrapers
  • an insulated carrying case to hold all of the above and maintain a stable environment while performing calibration

The large container is used to create a stable environment. The small containers are used to hold the saturated salt solution. The saturated salt solutions generate well-defined humidities when they are confined to a contained environment.

Kestrel 792 Collapsible Tripod - Black

$89.00



A tripod fitted with the same Kestrel friendly clamp as on our mini tripod. Will accommodate any Kestrel model. Or remove the clamp to attach the Vane Mount. The 5 section twist and pull assembly extends to 51" and collapses to a mere 14". Weighing only 1.7 pounds, this tripod is the perfect companion on any trip!

Kestrel 807 Mini Tripod w/ Carrybag - Black

$25.00



Clamp any Kestrel into this sturdy but lightweight tripod to take readings in the field. The tripod’s legs extend to permit a maximum height of 10", and a minimum of 6". Ultra-compact and portable, it folds to just 7.5” and weighs 4.8 oz. For further options, the top clamp detaches and is compatible with any tripod with a standard tripod mount (1/4" 20 thread fitting). Comes with a padded carry pouch.

Kestrel 793 Tripod Clamp - Black

$25.00



Kestrel Tripod Clamp. Holds any model Kestrel. Attaches to any standard tripod

 
For Phone Orders, call toll-free 888-337-4684 (Monday - Friday 9 am - 6 pm E.S.T)
All other inquiries, please phone 718-339-6212
FAX 718-336-5570

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