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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  • 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…

  • The AQ600 is a Portable Dissolved Oxygen meter ideal for use in school laboratories. Dissolved Oxygen measurements are also very important in fish farms and ponds, where Oxygen levels are continuously monitored to obtain optimal reproduction. The AQ600 calibrates easily in 2 points (at 100%…

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    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…

  • Robust polarographic dissolved oxygen determination outdoors Robust in design, optimized for one-handed use, and comprising an intuitive menu structure, the new Seven2Go portables offer quality dissolved measurement for laboratory, at-line, and outdoor environments. Simple Menu -…

  • Get the readings that you need where you need them with the Thermo Scientific Orion Star A223 RDO/Dissolved Oxygen Portable Meter. The large, backlit graphic LCD display shows dissolved oxygen in percent saturation or concentration with temperature and electrode status, time, date and…

  • 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.

  • 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…

  • Oxygen level displayed as % Saturation or Concentration (mg/L [ppm]) Adjustable Altitude Compensation (0-20,000ft in 1,000ft increments) Adjustable Salinity Compensation from 0 to 50ppt Analog bargraph indicates trrends Memory stores up to 25 data sets with DO and Temperature reading …

  • Stores up to 25 data sets Waterproof to IP67 Adjustable salinity compensation The PockeTester dissolved oxygen tracer offers oxygen level displayed as % saturation from 0 to 200.0% or concentration from 0 to 20.00 ppm (mg/L). Unit features adjustable salinity compensation from 0 to 50 ppt and…

  • 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 …

  • 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 …

  • Handheld dissolved oxygen instrument for the lab or field! 3-year instrument; 2-year cable warranty User-replaceable cables and sensors. Choose polarographic or galvanic for the field or a self-stirring BOD probe for the lab One Touch Cal allows easy DO calibrations within 3 seconds…

  • 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…

  • 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.

  • Model 5739 (7230R35) Screw-apart construction lets you quickly change from one cable length to another Ability to replace either probe or cable without replacing the entire assembly Pressure compensation, temperature compensation, built-in weight, long-life, polarographic…

  • 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…

  • Sper Scientific

    Measures dissolved oxygen to determine water quality in environmental testing, labs, industrial and municipal waste water, aquariums and fish hatcheries Automatic temperature compensation as well as compensation for salinity and altitude (all factors directly effecting DO readings) …

  • 1213U81 (WD-35640-80): Includes two complete membrane cap assemblies and 50mL of electrolyte solution. 1213U80 (WD-35640-72): Replacement membrane assembly consists of a preassembled membrane, membrane lock, O-ring, and cap. Simply screw replacement membrane assembly onto your probe. …

  • 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…

  • 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…

  • Accessory for Orion Dual Star, Star A and Versa Star Pro Meters: (2115000, 2115001, 2115101, 2115102, 2115201, 2115202, 2115203, 2115204, 2115205, STARA2110, STARA2114, STARA2115, STARA2116, STARA2117, STARA2118, STARA2119, STARA2120, STARA2125, STARA2126, STARA2130, STARA2135, STARA2136,…

  • 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

  • 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…

  • The DO200M dissolved oxygen instrument offers fast dissolved oxygen response times in wastewater, surface water, and aquaculture applications. Available sensors are EPA approved for wastewater compliance reporting of BOD, CBOD, and DO. Compared to the EcoSense® DO200A, the DO200M features…

  • 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…

  • The well-priced pH/mV, conductivity and dissolved oxygen FiveGo portable meters are the perfect choice for a wide range of applications wherever you are. Time is an ever more valuable asset. Thanks to the FiveGo™'s intuitive operation, robust design and extensive memory functions,…

  • Fast and precise optical dissolved oxygen determination in the lab or outdoors Optimized for dissolved oxygen in the laboratory, at-line, or outdoors, the new Seven2Go Pro S9 portable is designed to provide users with fast quality data, one-handed operation and durability. Robust in…

  • 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…

  • Thermo Scientific Orion

    This versatile meter has a large, color graphic LCD display. The informative display shows readings, connections, time, date, sample ID, user ID and calibration information. Select from five modules to customize the four channels as you need it – it's versatile for you…

  • 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 200-BOD is a self-stirring BOD probe designed to fit into standard 300 mL BOD bottles and used with the DO200 handheld DO instrument. Uses wall power - power supply included Modular design allows for serviceability Uses convenient screw-on PE cap membranes for the fastest repsonse times

  • 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

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