RDO^® Sensors for the TROLL 9500

Two styles of the RDO Sensor are available for use with the TROLL^® 9500 water quality instrument.

RDO Direct-Connect Sensor
This sensor is ideal for DO measurements on a sonde less than 2-in diameter. A TROLL 9500 fitted with the RDO Direct-Connect Sensor also can include:

• pH/ORP or ISE sensor
• Conductivity sensor
  
  

Cable-Connect RDO Sensor
This sensor is ideal for applications where turbidity and/or pressure sensors are required, resulting in a sonde less than 4-in diameter. A TROLL 9500 fitted with the RDO Cable-Connect Sensor can contain a full suite of sensors:

• pH, pH/ORP or ISE sensor
• ISE sensor
• Conductivity sensor
• Turbidity, pressure, or both
  
  

USGS Uses RDO Sensors

Learn how the USGS is monitoring dissolved oxygen trends in Albuquerque, NM with RDO^® Sensors. Four RDO sensors are deployed in a network of stormwater channels that flow into the Rio Grande. Read the Stormwater magazine article.

EPA Recommends Approval

The EPA has granted nationwide approval to three In-Situ RDO optical DO methods under the Alternate Test Procedure (ATP) process. These methods can be used in the measurement of BOD, CBOD, and DO under the Clean Water Act. Learn more ...