Crop Circle - Model ACS-435 -Active Crop Canopy Sensor

The ACS-435 incorporates three optical measurement channels. The sensor simultaneously measures crop /soil reflectance at 670 nm, 730 nm and 780 nm. A unique feature of the ACS- 435 sensor, unlike any other active sensor on the market, is its ability to make height independent spectral reflectance measurements. Holland Scientific refers to these reflectance measurements as Pseudo Solar Reflectance (PSR). This means the spectral reflectance bands are scaled as percentages and will not vary with sensor height above a target. This opens the possibility of using literally dozens of vegetative indices that do not use ratio based calculations.

Using the Holland Scientific GeoSCOUT X datalogger, data can be easily and quickly recorded to a text file on an SD flash card. Additionally, by connecting a GPS receiver to the GeoSCOUT, data collected from the ACS-435 can be georeferenced and stored for later analysis in third party GIS software.

• 3 measurement channels: 670nm, 730nm and 780 nm
• Computes height independent absolute reflectances
• Make measurements day or night
• Measurements not influenced by fluorescent or other AC light sources
• Wide measurement range— 0.25 m to 2.0 m
• Rugged IP68 packaging— dust and water resistant
• Low noise performance
• Fast data output rate
• Light weight < 0.43kg