Dissolved Oxygen Probes

Polarographic Dissolved Oxygen Probes
A complete line of polarographic dissolved oxygen probes are available for BOD (Biochemical Oxygen Demand) analysis, beer and wine testing, rugged field applications, and water and wastewater analysis. All DO probes feature automatic temperature compensation and convenient screw on membrane caps that reduce probe servicing time and eliminate assembly problems. The AUTO-STIR probe fits directly into a standard BOD bottle and has a built-in stirrer. This probe offers convenience, quick response, and long life between servicing

RDO - Measuring Dissolved Oxygen with a Luminescence-Based Sensor
The Orion RDO probe provides reliable measurements, no warm up time, no stirring, no maintenance (membranes or solution), no thermal shock and less interferences. The sensor cap requires easy annual replacement. The optical sensor cap is durable, able to withstand harsh environments without degradation or effect on performance. The cap has minimal hydration effects and is not prone to photo bleaching. Calibration information is stored in the sensor cap enhancing the ease of use. All RDO probes come with a stainless steel guard and calibration sleeve and are intended for field use.

Differences Between Polarographic DO and Optical DO

  Polarographic Probe Optical Probe
Maintenance Replace electrolyte and polish cathode about every 2 months. Clean probe as needed Clean, probe, cap and optical window as needed
Storage In moist calibration sleeve, long term, remove membrane cap and store dry In moist calibration sleeve
Membrane Change as needed, about every 2 months Must be replaced every 365 days, do not use with solutions that contain organic solvents
Electrolyte Change as needed, about every 2 months None required
Warm-Time Required Required if just connected to meter (30-60 minutes) None required
Stirring Required None required
Interferences Ozone, sulfides, sulfur dioxide, nitrous oxide and carbon monoxide Alcohols greater than 5 %, hydrogen peroxide greater than 3 %, sodium hypochlorite greater than 3 %, gaseous sulfur dioxide and gaseous chlorine
083005MD, 083010MD, 083025MD and 083060MD Durable and Accurate DO Probes

For lab and field applications, cable lengths from 1.5 to 20 meters.

Connector Type MiniDIN
086030MD and 086020A AUTO-STIR Probe for BOD Applications
For lab applications, self-stirring with one-touch control.  
086030MD MiniDIN / Phono Tip Stirrer Jack connector
081010MD Reliable DO Probe
For lab and field applications. Rugged epoxy body.  
Connector Type MiniDIN
970899WP Converts Any pH Meter into a DO Meter
For lab applications, works on pH meters with BNC.  
Connector Type BNC Waterproof
RDO Optical Dissolved Oxygen Probes
Rugged, low maintenance field probe. No membranes to change. Sensor cap replaced annually.
Accuracy ±0.1 mg/L from 0 to 8 mg/mL & ±0.2 mg/L from 8 to 20 mg/mL
Response Time T90, 30 seconds and T95, 60 seconds
Operating Range 0 to 20 mg/L and 0 to 200 %
Temperature Range 0 to 50 °C
087010MD 3 meter cable
087020MD 6 meter cable
087030MD 10 meter cable
087050MD 15 meter cable
087100MD 30 meter cable