Kestrel® 4300 Construction Weather Tracker
Ensure worker and equipment safety by knowing accurate local weather conditions.
The 4300 features a 1800-point data logger and measures:
- Evaporation rate
- Relative humidity
- Wind speed - current/max/average
- Temperature
- Dewpoint
- Barometric Pressure
- Heat Stress Index
- Wet Bulb temperature
- Wind Chill
- Altitude
- Density Altitude
Advanced 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
- User-replaceable impeller
- Flip-top impeller cover
Kestrel 4300 Kit Includes:
- Soft carry pouch
- Neck lanyard
- Batteries – 2 AAA
Measuring the relative humidity, ambient temperature and wind velocity right where the concrete is being placed can help prevent plastic shrinkage from occurring, and a Kestrel 4300 is the perfect solution. In addition to the current environmental conditions, the 4300 automatically calculates the evaporation rate, eliminating the need to refer to ACI charts.
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.
Manufacturer:
Nielsen - Kellerman
