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Download the Kestrel 4300 data sheet - available online soon
With the optional Computer Interface a Kestrel 4300 becomes a complete weather station and data logger.
Compare the Kestrel 4300 with the other members of the Kestrel range
The Kestrel 4300 Construction Weather Tracker has been developed in conjunction with construction industry experts to provide a specialised Kestrel instrument for construction professionals who lay concrete.
The new Kestrel 4300 measures and displays evaporation rate in addition to other environmental conditions. The user simply enters the concrete temperature (obtained via an IR or probe thermometer *) and the evaporation rate is instantly calculated and displayed.
The 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.
Ideal for construction workers and engineers, the Kestrel 4300 also offers a multitude of features to help you monitor your environment in one single instrument. At the touch of a button important weather information is clearly shown in digital or graphical form.
Individual functions can be displayed in 3 different formats: current, minimum/maximum/average and chart. There are also 3 user screens, which can be customised to simultaneously display the 3 most appropriate functions for the application.
The Kestrel 4300 can be set up to log data automatically (as well as manually) at programmable intervals, in order to display a history of weather information. Graphs display up to 1800 data points and the value, time and date of capture point can be shown. The stored data can also be uploaded to a PC, for analysis/storage with the optional Kestrel Interface and Communicator software.
High precision jewel bearings and a lightweight impeller provide accurate air flow measurements (+/-3% of reading) and the ability to operate at speeds as low as 0.3 metres a second. The impeller is user-replaceable in case of damage, also ensuring high accuracy levels are maintained for life. An integral hard cover protects the impeller when not in use.
A precision external thermistor sensor provides fast response temperature readings and accuracy of +/- 1°C. The 0.1 degree resolution of the display aids in determining when a consistent reading has been reached. A special housing protects the relative humidity sensor from contamination providing an accuracy of +/-3%. A monolithic silicon based pressure sensor enables barometric pressure and altitude to be calculated, with a resolution of 0.1mb and 1m respectively.
The combination of the Kestrel 4300 Construction Weather Tracker's multiple sensors result in the following derived functions: wind chill, heat index, dew point, wet bulb temperature, evaporation rate and density altitude. Wind chill is the combination of wind speed and air temperature, so the stronger the wind speed the colder it feels. Heat index is the combined effect of air temperature and relative humidity. Hot, humid air actually feels hotter than hot, dry air. Dew point is the temperature at which moisture forms on a surface. Density altitude is the density of the air expressed as an altitude.
The Kestrel 4300 is powered by two easily replaceable, AAA batteries and has two power saving modes to prolong battery life. All text can be displayed in one of several languages including: English, French, Italian, Spanish or German.
* IR or probe thermometer not included. For maximum accuracy when measuring the evaporation rate, measure the concrete temperature via an infrared or probe thermometer, enter the concrete temperature into the Kestrel, and position the unit facing into the wind, 50cm above the concrete. Shade the Kestrel's thermistor (temperature sensor) so it is not in direct sunlight. For the best accuracy, use the Kestrel's convenient averaging mode to average the evaporation rate over the recommended 6-10 seconds.
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