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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  • Robust, membrane-covered galvanic dissolved oxygen sensor for applications in flowing waters, fish hatcheries, aeration basins and more fields. With screw-on protection. The special membranes achieve stable measured values, especially in the aeration basin and similar applications with strongly…

  • 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)…

  • 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…

  • 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…

  • Affordable optical RDO technology reduces maintenance time and costs Eliminates costly, tiresome membranes and solutions Rugged, IP67-rated housing for plant and field applications USB and RS-232 output for up to 500 data sets 500 hours battery life, or optional universal power…

  • 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

  • Oakton

    Low-maintenance, galvanic probe requires no warm-up time Includes protective rubber boot which also functions as a benchtop stand These meters provide a great value. The ranges work to test water quality in wastewater, surface water, ground water, or drinking water. a clear LCD display…

  • 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 …

  • 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).

  • Thermo Scientific Orion

    Replacement probes for Thermo Orion DO meters Polarographic probes for use in the lab or the field Automatic temperature compensation Convenient, screw-on membrane caps Fast, reliable results

  • 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…

  • The Lovibond® overflow measuring flask is mainly used to conform to fixed or accurate volume instructions while conducting experiments. It is mainly used in research facilities and chemical laboratories. It is made of sturdy construction which endures heavy and rigorous usage.

  • The StirrOx® G not only ensures the necessary flow with its stirrer, but also the mandatory mixing of the samples. It fits perfectly into the funnel of the Karlsruhe bottles or with a funnel set also in Winkler bottles.

  • The ProOBOD® self-stirring optical BOD probes are designed to fit into standard 300 mL BOD bottles with an international version also available for use with other tapers. EPA approved for wastewater compliance reporting of BOD and CBOD. The ProOBOD is designed for use with the YSI ProODO…

  • 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…

  • 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 …

  • The YSI probe guard is compatible for use with 550A dissolved oxygen instrument. It is made of sturdy material which ensures durability and long lasting usage.

  • 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…

  • GLP functions QA functions Laboratory oxygen meters have a large multifunction display. The inoLab Oxi 7300® and Oxi 7400® meters offers a range of automated functions such as air pressure correction, temperature compensation and OxiCal rapid calibration. The inoLab740…

  • 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

  • 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…

  • 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…

  • YSI 5914 screw-on cap dissolved oxygen membranes for 2002 Galvanic sensors. Used with Galvanic probes.  Includes bottle of NaCl electrolyte, 1 sanding disc, and 6 screw-on cap membranes. 2.00 Mil PE, Polyethylene membranes (Blue cap). Convenient scew-on cap membranes make membrane changes…

  • 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 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…

  • 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.).

  • Thermo Scientific Orion Star A123 Dissolved Oxygen Portable Meters combine simplicity with accuracy. A large LCD displays dissolved oxygen readings along with temperature. Icons provide quick updates on battery life and completed calibration status. Simple button layout and onscreen messages help…

  • Easy user-replaceble sensor allows for quick sensor replacements if needed.  Quickly switch DO sensors without having to send in the instrument for repair or replacing the entire cable assembly.  Uses convenient screw-on cap membranes making membrane changes simple and easy Use…

  • 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  

  • The YSI ProDSS ODO/CT probe is the first expansion of the ProDSS system. The ODO/CT probe and cable assembly features integral (i.e. built-in) optical dissolved oxygen, conductivity, and temperature sensors and is available in lengths up to 100 meters. It’s perfect for measuring DO in the…

  • Easy to use, rugged and reliable, the YSI Pro1020 provides everything you need in a handheld instrument for the measurement of dissolved oxygen, temperature and either pH or ORP. User-replaceable sensors and cables, 50 data set memory, and convenient calibration routine makes it user friendly. A…

  • 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…

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