Heat flux plate or heat flux sensor which measures the heat that flows through a material in which it is installed. Often used in soils for monitoring heat flows through root zones, and in buildings for insulation and climate control.
Made by Delta T Devices. The BF5 Sunshine Sensor is a versatile, multi-purpose solar radiation sensor which uses an array of photodiodes with a unique shading pattern to measure global and diffuse radiation and calculate direct radiation.
Made by Gill Instruments, this ultrasonic wind instrument records wind speed and direction. The no maintenance operation makes this suitable for use in demanding environments. The very low starting threshold makes it the appropriate sensor when EPA requirements must be met.