Overview

The Mars Soiling Sensor provides simplified measurement of soiling losses for PV installations. 
Patented Mars technology detects accumulated soiling particles on a soil collection window 
using an internal camera. Mars units require no water, have no moving parts, are compact and 
easy to install, and do not require site-specific dust calibration or technician cleaning visits. They 
are suitable for a wide range of PV installations. 
This User Guide is for Mars model 810230-20, Hardware Revision 01 released August 2023 
(810230-20-01), shown in Figure 1-1. This model replaces all earlier versions and model 
numbers. For information on earlier versions and models, please visit support.atonometrics.com.  
The Mars unit has a single M12 user connection port. Use this M12 power and RS485 port to 
power your unit and record data via Modbus RTU over RS485. The Mars units aluminum 
enclosure provides for various mounting options.