DO Meters

DO Meters


Environmental Express Oakton Benchtop Meters

Item No. Description
EE3541500 Oakton DO 700 Benchtop Dissolved Oxygen Meter
EE3541501 Oakton DO700 Benchtop DO Meter w/ NIST-Traceable Cal
EE3541600 Oakton DO2700 Benchtop Meter
EE3541601 Oakton DO2700 BT DO Meter, w/ NIST calibration

Environmental Express Oakton DO Probes

Item No. Description
EE3542082 Oakton DO2700 Replacement Self-stirring Probe
EE3564053 Oakton RDO 450 Replacement RDO Probe, EA
EE3564055 Oakton RDO 450 Probe with 25 ft Cable, EA
EE3564057 Oakton RDO 450 Probe with 50 ft Cable, EA
EE3564250 Oakton Replacement DO meter probe with 3-ft cable

Environmental Express Oakton Parts/Accessories

Item No. Description
EE3564051 Oakton RDO 450 Replacement Sensor Cap, EA
EE3564058 Oakton RDO Calibration Chamber/Sleeve
EE3564059 Oakton RDO 450 Probe Guard/Weight
EE5310955 Membrane Assembly for Oakton DO2700 meter

Environmental Express Oakton Portable Meters

Item No. Description
EE3564032 Oakton Waterproof DO 450 Portable Meter Only
EE3564090 Oakton Waterproof DO 450 Portable Meter Kit

Misc DO Meter and Probe Supplies

Item No. Description
EE0065300 Zero Oxygen Calibration Solution, 500mL

Optical Meters and Probes

Item No. Description
TORVSTAR30 WetChem - Orion VersaStar BT Meter w/RDO/DO Module
TORVSTAR90 WetChem -Orion VersaStar pH/ISE BT w/ RDO/DO Modules

YSI DO Probes

Item No. Description
EE0551060 YSI Model 5010: Self-Stirring BOD Probe
EE0551942 YSI Model 5905: Self-Stirring BOD Probe


Can this probe connect to YSI 5000 meter. thank you

This probe is not designed for use with the 5000 series meters. It must be used with the ProODO or ProSolo meters.

Can this probe connect direct to YSI 5000 meter? thank you

This probe is not designed for use with the 5000 series meters. It must be used with the ProODO or ProSolo meters.

Is it EPA approved? What are the annual maintenance costs? New probe? sensor cap? Does it require moving water, ie stir bar?

The EPA does not approve technology or equipment any longer, they approve methods and require that any technology follows the chemistry of that method. This DO meter/probe is one of the optical varieties. There are approved methods for DO/BOD that do have the optical probes as the required equipment. You can use this probe/meter with any of the approved optical DO methods. The maintenance on this probe consists of replacing the sensor cap every 365 days. There is a countdown timer in the microchip on the cap that starts from the first day of use. The replacement cap part number is EE3564051. This probe does not require a stirrer of any sort to obtain an accurate reading. Stirring the sample will speed up the reading time by a small amount.

Is this probe EPA approved or PA DEP approved?

EPA does not approve or endorse specific instruments. However, EPA does not restrict the use of instruments or equipment that employ technology which is different from the EPA approved methods as long as the user follows the procedures required in the EPA methods, as well as the manufacturer’s operating instructions for proper use. Standard Methods 5210 B is the most commonly used method for BOD analysis. It calls for the DO content to be measured using either the azide modification of iodometric method or a membrane electrode. Footnote 63 in the table of approved test procedures from 40 CFR part 136 carries the following instructions “Hach Method 10360, Luminescence Measurement of Dissolved Oxygen in Water and Wastewater and for Use in the Determination of BOD5 and cBOD5. Revision 1.2, October 2011. Hach Company. This method may be used to measure dissolved oxygen when performing the methods approved in Table IB for measurement of biochemical oxygen demand (BOD) and carbonaceous biochemical oxygen demand (CBOD).”

The method asks that you adjust pH while performing BOD analysis. Do you have a probe/meter that does DO and pH?

There are meters available that will do both DO and pH. You will have to have a separate probe for each parameter. Item TORSTARA2160 has two ports available, one for a pH probe and one for a DO or RDO probe. There is also a meter that is customizable for the parameters that it can read. TORVSTAR00 has 4 module slots available. You can order any combination of pH/ISE, DO/RDO, or conductivity modules to customize your setup. The setup can be modified at any time as your needs change.

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