Dissolved Oxygen Probes

Dissolved oxygen probes are designed to measure dissolved oxygen concentration within liquid samples, making them essential lab accessories. The probes are suitable for environmental monitoring, assessments of water quality, and fermentation processes.
At Thomas Scientific, we have a great range of optical do probes, DO membranes, and Multiparameter Meters to accommodate a range of laboratory requirements. Some even offer suitability within the field environment.
Dissolved oxygen sensors are manufactured robustly and carry extensive memory functions. The helpful features of a three-color backlight (waterproof and floating in the water) can provide extra time and ensure ultimate efficiency when dealing with complex systems and measurement setups to achieve clear, accurate readings.

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Dissolved Oxygen Meters

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  • Self-stirring laboratory BOD probe for use with the EcoSense DO200 or DO200A. Includes external power adapter and 5908 Cap Membrane Kit (1.25 Mil PE membranes).

  • Includes bottle of electrolyte, 1 sanding disc, and 6 screw-on cap membranes. 1.25 mL PE membranes.  Yellow cap. Response Time (T95 - from 0 to 100%) = 8 seconds Flow Dependence After 4 Minutes = 25% Required Flow Rate = 6 inches/second

  • The Thermo Scientific Orion Star A326 pH/RDO/ Dissolved Oxygen Portable Meter is the top choice for advanced measurements on location. Get the information you need quickly and easily from the large, backlit graphic LCD display. Informative display shows individual pH/mV/ RmV or dissolved oxygen in…

  • The Pro DIGITAL ODO/T probe and cable assembly features integral optical dissolved oxygen and temperature sensors. Cable lengths are available up to 100 meters. The ODO/T probe assembly pairs with the ProSolo Handheld to form a complete sampling system. Please visit the ProSolo ODO/T Kits …

  • A number of accessories are available for use with the 970 dissolved oxygen meter.

  • Convenient, compact design with large display Digital filter improves measurement speed and accuracy Clear large-screen LCD with white backlight Stable reading and automatic lock-up modes available IP57 waterproof and dust-resistant rated – great for use under harsh environments …

  • The portable WTW ProfiLine meter series is available in three (3) series versions, the 3110/3205-Basic series, 3210-Professional series and 3310-Advanced series, each with a distinct level of sophistication for the independent measurement of pH, conductivity, or dissolved oxygen. All versions have…

  • Oakton® probes use galvanic technology to provide rapid results, without any warm-up requirements for field use or economical polarographic technology for BOD use. Includes 50mL of electrolyte solution and one replacement membrane cap. Probe dimensions: 5"L x 0.5" dia (11.5 cm L…

  • Easy user-replaceable sensor allows for quick sensor replacements, if needed. No tools necessary. One-year sensor warranty. Uses convenient screw-on cap membranes making membrane changes simple and easy. Use with the Pro20, Pro20i, Pro1020, Pro2030, and Pro Plus instruments. Cables…

  • Thermo Scientific Orion

    The Orion ROSS® pH electrode, which is recognized as the best pH electrode in the world for difficult samples, is now even better. The Orion ROSS® Ultra has twice the warranty and greater stability than its predecessor. It uses a unique reference system developed by Thermo Scientific that…

  • Sper Scientific

    Measures dissolved oxygen to determine water quality in environmental testing, labs, industrial and municipal waste water, aquariums and fish hatcheries. Designed for simple one-hand operation with automatic temperature compensation and calibration to air. The polarographic probe has a built in…

  • The S600 SevenExcellence™ DO meter allows users to determine dissolved oxygen content in samples polarographically using any of METTLER TOLEDO's state-of-the art InLab® 605 polarographic dissolved oxygen sensors. The S900 SevenExcellence DO meter allows users to determine…

  • Thermo Scientific Orion

    The DO Auto-Stir™ probe is designed for fast and easy BOD analysis with the Thermo Orion 862A DO/BOD/Temperature Meter. The built-in stirrer provides vigorous sample agitation, preventing oxygen stratification and can easily be disassembled for cleaning. The probe stand, which is free…

  • Jenway (Cole-Parmer)

    Results as % air saturation, % oxygen or mg/l Automatic zeroing and calibration Atmospheric pressure and salinity correction BOD5 measurement and calculation RS232 for connection to printer or PC and IrDA for cableless printing option The 9500 is a research meter designed for…

  • Convenient Portable Dissolved Oxygen Meter for Wherever Your Work Takes You. After more than a century of perfecting the art of measurement through our durable weighing products, OHAUS precision is now available in the form of

  • Resipher 96x Starter Kit for use with 96-well plates Includes: (1) Resipher Data Hub, (1) Resipher 96x Reader, (3) sterile sensing lids, all cables Turns a 96-well plate into a precise dynamic oxygen consumption reader, measures 96 wells Utilizes Lucid Lab Cloud software for connection to any…

  • Usable with all classic grey box and lab meters Measures dissolved oxygen and temperature in B.O.D. bottles Designed to fit into neck of any bottle with a 0.675 inch opening Probe requires manual stirring or use of magnetic stirrer With Membrane and KCl kit. Lead, 1.5 meter (5 ft.).

  • The Thermo Scientific Orion Star A216 pH/ RDO/Dissolved Oxygen Benchtop Meter is the ideal choice for any lab. Get the information you need quickly and easily from the large, backlit graphic LCD display. Informative display shows individual pH/mV/RmV result, dissolved oxygen in percent…

  • The MW600 is a Portable Dissolved Oxygen meter ideal for use in education, labs, aquaculture, environmental, wastewater treatment or pond and stream management. Anywhere accurate Dissolved Oxygen measurements are important and where Oxygen levels are continuously monitored to obtain optimal…

  • HI6421 includes Hanna's HI7641133 optical dissolved oxygen probe (opdo®) that is based on the principle of fluorescence quenching. An immobilized Pt-based luminophore is excited by the light of a blue LED and emits a red light. As oxygen interacts with the luminophore it reduces the…

  • Compact size is ideal for laboratory dissolved oxygen measurement applications Large brightly-lit LCD shows allows for easy viewing of measured values Low-maintenance galvanic probe requires no warm-up time Built-in memory stores up to 100 data points DO 700 meter…

  • SevenGo™ instruments – robust meters for professional measurements The dual-channel instrument SevenGo Duo pro SG98 and the single-channel instrument SevenGo pro SG9 offer: Waterproof and dustproof in accordance with IP67 User-friendly display with background…

  • The 626250 can be ordered in lengths of 1, 4, 10, 20, 30, 50, or 100 m. ODO probe and cable assemblies come with an ODO sensor cap. Cables over 1 m also come with a cable management kit. The 626250 optical DO probe and cable assemblies are for the ProODO. Although the 626250 assembly will also work…

  • Save money by replacing sensor, not the tester Large easy-to-read LCD features three-color backlight Simple to calibrate with automatic standard recognition Rugged IP67-rated housing is waterproof, dustproof, and floats in water with sensor cap on Leakproof cap with fill line…

  • Easy user-replaceble sensor allows for quick sensor replacements if needed.  No tools necessary. Uses convenient screw-on cap membranes making membrane changes simple and easy Use with the Professional Plus and Pro20 instruments Cables must be ordered separately One-year…

  • Replaceable cap membrane Removable stirring mechanism Interchangeable design Simplifies measurement operations Use with standard 300 mL BOD bottles; no need for external stirring devices. Improved membrane life assures measurement consistency and speeds maintenance. Probe accuracy…

  • The DO210 is a Dissolved Oxygen Meter which measures DO from 0 to 20.0mg/L, Oxygen Percent from 0 to 100.0% and Temperature with ATC. This meter features Adjustable Altitude and Salinity Compensation as well as min, max and data hold functions. Complete with DO probe with membrane and 39" (1m)…

  • The Quatro is a 4-port cable for use with the Professional Plus instrument. The Quatro is a true field cable with MS (military spec) connectors, two year warranty, and rugged, weighted probe guard. Create a powerful multiparameter sampling instrument. Measure conductivity/temperature,…

  • Includes bottle of NaCl electrolyte, 1 sanding disc, and 6 screw-on cap membranes. 1.25 Mil PE, Polyethylene membranes. Yellow cap. Response Time (T95 - from 0 to 100%) = 8 seconds Flow Dependence After 4 Minutes = 25% Required Flow Rate = 6 inches/ second

  • Includes bottle of electrolyte, 1 sanding disc, and 6 screw-on cap membranes. 2.00 mL PE membranes, Blue cap Response Time (T95 - from 0 to 100%) = 17 seconds Flow Dependence After 4 Minutes = 18% Required Flow Rate = 3 inches/second  

  • Galvanic DO Sensor for use with Professional Plus and Pro20 instruments. Easy user-replaceble sensor allows for quick sensor replacements if needed Comes with six membrane caps and bottle of solution

  • Pro20i Parameters Dissolved Oxygen (DO%, DO Local, mg/L, ppm) Temperature (°C, °F) Barometric Pressure (mmHg, inHg, mbar, psi, kPa) The YSI Pro20i provides everything you need in a handheld dissolved oxygen meter. Ruggedness, simplicity and reliability are the…

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