Kestrel Specialty Meters are engineered to meet the needs of a variety of different professionals. The Kestrel 4300 Construction Weather Tracker measures the evaporation rate of concrete and concrete moisture. The Kestrel 4200 for HVAC pros calculates airflow CFM and dehumidification. The Kestrel 3500 Delta T is designed specifically for the agricultural industry. For jobs that rely on instant, accurate environmental information and calculations, Kestrel Specialty instruments are essential.