Innovations in Water Monitoring Optical RDO® Titan Dissolved Oxygen Probe Environmental professionals, aquaculturists, and NPDES permit holders use In-Situ® Inc.’s Rugged Dissolved Oxygen (RDO) Titan Probe for longterm monitoring and process control. The RDO Titan Probe uses optical technology for measuring DO in demanding process environments. The U.S. Environmental Protection Agency (EPA) has approved In-Situ Inc.’s RDO methods for use in Clean Water Act programs. Visit the In-Situ website to learn more about using breakthrough optical technology at your facility. Simple Design • • • Automates setup and reduces user error—Calibration coefficients and expiration clock are loaded into sensor cap. Eliminates membranes and filling solutions Flexible communications—Standard Modbus/RS485 output Cost Effective • • • Integrates into control and alarm systems with open communications protocols and flexible power options Eliminates the need for a costly transmitter or controller Includes probe with detachable cable. Cable is available in custom lengths. Robust Construction • • • Resists abrasion and photobleaching effects Withstands high salinity environments—Corrosion-resistant materials used to construct probe body and sensor Insensitive to interferences that plague membrane-based sensors (hydrogen sulfide, chloride, ammonium, and others) Requires infrequent calibration Includes diagnostic tools to help you evaluate sensor health Operates with very low drift for long periods of time Responds quickly to oxygen and temperature changes Delivers consistent, reproducible results (<0.05 mg/L) Municipal/industrial water and wastewater treatment Food/beverage process control Aquaculture settings

Optical RDO® Titan Dissolved Oxygen Probe RDO Titan Oxygen Probe Sensor type Optical DO probe uses Classic Sensor Cap Range, DO 0 to 50 mg/L Accuracy, DO ±0.1 mg/L, 0 to 8 mg/L; ±0.2 mg/L, 8 to 20 mg/L; ±10% of reading, 20 to 50 mg/L Resolution, DO 0.01 mg/L Response time, cap T90: <45 sec. T95: <60 sec. @ 25° C Range, temp. 0° to 50° C (32° to 122° F) Accuracy, temp. ±0.1° C typical Resolution, temp. 0.01° C Salinity comp. Fixed or real-time capable Barometric comp. Fixed or real-time capable Methods EPA-approved In-Situ® RDO methods 1002-8-2009, 1003-8-2009, 1004-8-2009 Standard Methods 4500-O...