The Seametrics DO2 dissolved oxygen logger provides precision optical transmission and detection to measure oxygen concentration in the fluid outside of the sensor. It utilizes fluorescence of a stable, immobilized ruthenium-based film matrix, an industry-standard technology for reliable DO measurement.

This digital RS485 interface device records over 260,000 records of dissolved oxygen, temperature, and power supply voltage data in non-volatile memory, operating with low power consumption. The internal microprocessor runs on 12 VDC and automatically turns the sensing unit on and off as needed to conserve power.

The sensor does not require water movement, flow, or frequent cleaning and calibration. With no membranes, fill solutions, replacement caps, or cartridges required, maintenance is minimal. The 1.66-inch diameter fits easily in 2-inch wells for groundwater monitoring. Included Aqua4Plus software provides control for setting up flexible recording sequences, retrieving data, monitoring real-time data, and viewing collected data.