EPA Recommends Approval of In-Situ^® RDO^® Optical DO Methods

The U.S. EPA has granted nationwide approval to three In-Situ RDO optical DO methods under the Alternate Test Procedure (ATP) process. Learn more ...

The TROLL^® 9500 water quality instrument accommodates the following sensors:

• Rugged Dissolved Oxygen (RDO) sensor
• Clark cell DO sensor

• Conductivity in both low and high ranges
• Ion-selective electrodes — Ammonia, chloride, and nitrate
• pH
• pH/ORP
• Pressure
• Turbidity, with or without a wiper
• Each instrument comes standard with barometric and temperature sensors.