DustIQ: Optical Soiling Measurement Technology

DustIQ from Kipp & Zonen monitors the loss of light transmission due to the occurrence of dust on PV panels. This is performed using the innovative Optical Soiling Measurement OSM) technology from the company. The instrument has no moving parts and avoids the need for sunlight to perform measurements.

DustIQ offers the data needed for solar energy plant management systems, thus enabling users to decide precisely when and where to clean. Users can set alarms in their system software to point out when a specific soiling ratio is reached and cleaning is required. The cost-effective pricing of the instrument enables users to install a network of DustIQ units to track the variation in soiling throughout the plant.


  • Maintenance-free
  • Users can know precisely when and where to clean
  • Can be combined with leading plant management software
  • Improves yield


Source: Kipp & Zonen

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Transmission Loss (TL) range Percentage of sunlight that is blocked or scattered in such a way that it does not reach the actual solar cells 0 to 50%
Soiling Ratio (SR) range 100 to 50% (SR = 100 –TL)
Transmission loss measurement accuracy ±0.1 of reading ±1% (after local dust calibration)
Ambient working temperature -20 to +60 °C
PV panel temperature sensor -20 to +100 °C, ±1 °C
Tilt X and Y -180 to 180 degrees ±1 degree
Communication Modbus® over 2-wire RS-485
Power 12-30 VDC, 200-70 mA at 24 V, 500 mA power supply is advised
Dimensions unpacked 990 x 160 x 35 mm
Weight unpacked DustIQ unit: 4 kg; Mounting clamps: 600 g

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