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Accurate dissolved oxygen (DO) measurement is crucial for a variety of applications, from environmental monitoring to aquaculture and industrial processes. Selecting the right dissolved oxygen meter ensures reliable data, preventing costly mistakes and ensuring optimal conditions for aquatic life or industrial operations. This guide will help you navigate the key considerations for making an informed purchase.
Digital Dissolved Oxygen Meter: Has two measurement units: mg/L (dissolved oxygen content per liter of water) and % (percentage of saturated dissolved oxygen). Test Range is 0.0-40.0 mg/L and 0.0-300.0%. Do Meter comes with a 3.6-ft (1.1-meter) electrode...
Digital Dissolved Oxygen Meter for Pond: For most aquatic life, oxygen levels must be at least 6 mg/L. Use a pond oxygen meter to monitor oxygen levels in aquariums, ponds, fish tank, koi pond, and goldfish ponds to ensure your ponds has enough dissolved...
Portable Do Meter for Hydroponic: In hydroponic systems, especially deep water hydroponic systems such as NFT, RDWC, drip irrigation system, and aquaponics, it is very important to use the dissolved oxygen meter to monitor the dissolved oxygen content in...
Widely Used Dissolved Oxygen Test Kit: Use EZTOCH Oxygen Analyzer can easily Measure the oxygen in water, homemade Meads, Beers, Ciders and Wine beering, water treatment, environmental monitoring, lake, rivers, aquaculture, hydroponics, and aquariums etc...
Simple Pond Oxygen Tester: 2-point calibration (0% and 100%) ensures high accuracy; backlit display allows for readings even in dimly lit environments; 5-minute auto shutoff extends battery life
[Portable DO Meter with mg/L and % Modes]: The dissolved oxygen test kit with two modes: mg/L mode (dissolved oxygen content in water, 1mg/L=1ppm) and % mode (saturation percentage). Easily obtain accurate oxygen content in the solution. Professional...
[Automatic Temperature Compensation and Manual Salinity and Altitude Compensation]: The GIDIGI dissolved oxygen test kit with ATC function, the test values are more stable. By connecting to the phone APP via Bluetooth, you can also set salinity...
[Digital Dissolved Oxygen Meter Kit with 3m Electrode Cable]: GIDIGI dissolved oxygen tester with a 3m electrode cable. With this dissolved oxygen test kit, you can test the oxygen content in deeper water and avoid the problem that the electrode cannot...
[GIDIGI Service for Every Customer]: GIDIGI dissolved oxygen meter with digital backlight LCD display, which can easily obtain readings in dim environments, and has data lock function and temperature switching function (℉/℃). GIDIGI support 365-day...
[Easy to Use and Calibrate]: GIDIGI dissolved oxygen tester comes with detailed instructions and complete accessories (replaceable membrane cap, electrolyte and zero oxygen water). No need to buy calibration solution, easily calibrate the tester. Simple...
Package: Includes 9 replacement membrane cap and 3 bottles of electrolyte solutoin, meeting the consumable needs of customers who frequently use the dissolved oxygen meter
How to replace the electrolyte: Pour out the old electrolyte from the membrane cap add new electrolyte, clean the membrane cap, then pour out the old electrolyte again, and finally fill the membrane cap with new electrolyte
How to replace a membrane cap: Tighten the membrane cap thread to the left, discard the old membrane cap, and then tighten the membrane cap thread to the right to install the new membrane cap. When replacing or removing a membrane cap, do not touch the...
Replacement frequency for the following parts: Modules: Replace when damaged or inaccurate; Electrolyte: Replace with new electrolyte before each use
Electrolyte precautions: Store away from light and at a low temperature; keep out of reach of children.
🌊 Extended Probe Cable for Deep Water Testing:Equipped with a 1.5-meter (4.92-foot) electrode cable, this dissolved oxygen meter allows easy testing in deep water environments such as lakes, large ponds, and rivers, eliminating the issue of limited...
🧪 Dual Measurement Modes for Versatile Use:Features mg/L (0.0-40.0 mg/L) and % saturation (0.0-300.0%) modes, with simultaneous temperature display (℃/℉ switchable). Ideal for aquaculture, wastewater treatment, brewing, labs, and educational...
🌡️ Automatic Temperature Compensation (ATC) for Accuracy:Built-in ATC ensures stable and reliable readings by compensating for temperature variations, making it suitable for professional applications like environmental monitoring and industrial...
🔧 Easy Calibration & Complete Accessories Included:Comes with 6 replaceable membrane caps, 2 electrolytes, and 1 zero-oxygen water solution for quick calibration. No need to purchase additional materials—user-friendly maintenance reduces long-term...
📟 Backlit LCD Display for Low-Light Environments:The digital backlit screen ensures clear visibility in dim conditions, while data hold and temperature unit switching functions enhance usability during field tests or indoor experiments.
Professional Dissolved Oxygen Meter: LOHAND DO meter LH-D701 features a 0.00-20.00mg/L full dissolved oxygen measurement range with 0.01mg/L high resolution and ≤±0.3mg/L accuracy for ultra-reliable readings. It simultaneously tests dissolved oxygen...
Triple Compensation Technology: Equipped with manual atmospheric pressure compensation (60.0-110.0KPa) and manual salinity compensation (0.0-50.0g/L), paired with automatic temperature compensation (32-104℉). Effectively offsets environmental...
Ideal Design: Boasts a wide LCD screen with clear data display and intuitive operation prompts, plus high-brightness backlight for easy reading in dim light. Advanced 32-bit microprocessor technology enables one-click operation for data switching and...
Wide-Range Applications: High-Performance Portable Dissolved Oxygen Meter is an essential professional water quality testing tool for aquaculture, environmental monitoring, water supply & sewage treatment. Precisely tests tap water, swimming pool water...
What You Gain: 1*Instrument, 9.84ft SD02 dissolved oxygen electrode, 30mL electrolyte, spare membrane head + rubber ring, sandpaper, USB charging cable and user manual.
🌊 Extended Probe Cable for Deep Water Testing:Equipped with a 1.2-meter (3.94-foot) electrode cable, this dissolved oxygen meter allows easy testing in deep water environments such as lakes, large ponds, and rivers, eliminating the issue of limited...
🧪 Dual Measurement Modes for Versatile Use:Features mg/L (0.0-40.0 mg/L) and % saturation (0.0-300.0%) modes, with simultaneous temperature display (℃/℉ switchable). Ideal for aquaculture, wastewater treatment, brewing, labs, and educational...
🌡️ Automatic Temperature Compensation (ATC) for Accuracy:Built-in ATC ensures stable and reliable readings by compensating for temperature variations, making it suitable for professional applications like environmental monitoring and industrial...
🔧 Easy Calibration & Complete Accessories Included:Comes with 6 replaceable membrane caps, 2 electrolytes, and 1 zero-oxygen water solution for quick calibration. No need to purchase additional materials—user-friendly maintenance reduces long-term...
📟 Backlit LCD Display for Low-Light Environments:The digital backlit screen ensures clear visibility in dim conditions, while data hold and temperature unit switching functions enhance usability during field tests or indoor experiments.
Extended Range: Our Dissolved Oxygen Meter features an expanded range of 0.0-40.0 mg/L, surpassing the standard 0.0-20.0 mg/L range. This broader range supports a wide variety of applications, from aquariums to industrial uses.
User-Friendly Design: Measure and calibrate effortlessly without needing to remove the electrode’s protective cover. Simply immerse the electrode for quick, hassle-free usage. The Automatic Temperature Compensation (ATC) function ensures precise results...
Clear Digital Display: The easy-to-read LCD screen provides clear readings at a glance. Plus, the device features auto power-off after 8 minutes of inactivity and a low battery indicator to ensure uninterrupted usage.
Complete Package: The kit includes 6 probe protective covers and anaerobic water calibration powder for your convenience and reliability. If you experience inaccurate readings and calibration over time, consider replacing the membrane sleeve. The...
Wide Range of Applications: Our Dissolved Oxygen Meter is well-suited for measuring dissolved oxygen levels and temperature in various settings, including aquariums, swimming pools, ponds, aquaculture, research, and more. It consistently delivers precise...
【Smart 6-in-1 Multi-Parameter Display】 The GIDIGI Dissolved Oxygen Meter for water testing by displaying real-time measurements for DO,pH,salinity,TDS,EC and temp on a clear LCD screen. Built-in bluetooth, enabling instant data logging,print and...
【Lab-Grade Accuracy Meets Hassle-Free Calibration & Complete Accessories】 Say goodbye to complex setups—the GIDIGI dissolved oxygen test kit arrives fully equipped with solutions, 6 replacement membranes, 8 AAA batteries, and tools for easy use. Its...
【Pro Tool for Ponds, Aquariums & Hydroponics with Smart Compensation】 Engineered for demanding environments, the GIDIGI water quality tester adapts to salinity shifts (0–50 g/L), altitude changes, and temperature swings with manual compensation via...
【Future-Proof Durability & Outdoor-Ready Portability】 Built for rugged adventures, the GIDIGI Portable Dissolved Oxygen Meter features a shockproof case, longtime battery life, and an anti-fade LCD readable under sunlight. Test mountain stream DO for...
【Versatile Measuring Range and Wide Application】: The Digital DO meter accurately measures dissolved oxygen (DO) in the range of 0-200.0% or 0-20mg/l, pH range 0.00-14.00,Salt range 0-2000ppm,2.0-100.0ppt, EC range 0.0-1999μS cm,2.0-200.0mS cm,and...
Accurate Dissolved Oxygen Meter for Ponds: YINMIK dissolved oxygen meter offers two modes for measuring dissolved oxygen levels in water: mg/L mode (1 mg/L = 1 ppm) and % mode. It is a precise DO meter with a resolution of 0.01 mg/L and 1%, and a range of...
Portable Dissolved Oxygen Test Kit for Environmental Monitoring: YINMIK Dissolved Oxygen Reader features a portable packaging design (durable plastic shell, shock-resistant foam insert, and handle-style carrying design) for easy carrying and convenient...
Smart Dissolved Oxygen Meter: Connecting to the YINMIK APP via Bluetooth, the Bluetooth Dissolved Oxygen Meter can store 1000 dissolved oxygen readings and display changes in DO content via Excel. With ATC function, and salinity and altitude compensation...
Easy Calibration - Zero Oxygen Water: More convenient calibration mode requiring only 100% point calibration! ① For solution >2 mg/L, only 100% point calibration is needed.Testing the dissolved oxygen level of beer wort, 100% point calibration will...
YINMIK Dissolved Oxygen Meter Kits & Accessories: ① Complete kit: dissolved oxygen meter, 3.6ft electrode cable, dissolved oxygen cap, zero-oxygen water, electrolyte, white cap (for storage, to protect the probe), black cap (for testing, to protect the...
Dissolved Oxygen Meter Electrolyte Solution:Regular replacement of the new electrolyte can help the dissolved oxygen meter probe to stay in the best condition at all times, extending the service life of the tester.
GIDIGI provides detailed replacement instructions, with clear text and pictures, so that even beginners can quickly complete the replacement.
Please store in a ventilated and cool place,please tighten the bottle cap after use.
This electrolyte is suitable for GIDIGI dissolved oxygen meter and other similar products.
Last update on 2026-08-31 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Dissolved Oxygen Meters & Accessories
Accuracy and Resolution
The primary function of a dissolved oxygen meter is to provide precise readings. Look for meters with high accuracy specifications (e.g., ±0.1 mg/L) and good resolution (e.g., 0.01 mg/L). Consider the intended application; scientific research often requires higher precision than general environmental monitoring.
Probe Type and Maintenance
Dissolved oxygen probes come in two main types: polarographic and optical (luminescence-based). Polarographic probes are generally more affordable but require regular electrolyte replenishment and calibration. Optical probes are typically more expensive but offer faster response times, less maintenance, and greater stability. Ensure the probe is suitable for your sample type (e.g., water, wastewater, soil) and consider the ease of cleaning and replacement.
Features and Portability
Depending on your needs, consider additional features such as data logging capabilities, temperature compensation (essential for accurate DO readings), salinity compensation, and built-in calibration functions. For field use, portability is key. Look for rugged, waterproof designs with long battery life and clear, easy-to-read displays.
Frequently Asked Questions
What is dissolved oxygen (DO)?
Dissolved oxygen refers to the amount of free oxygen gas dissolved in water. It is vital for the survival of aquatic organisms and plays a role in various chemical and biological processes in water bodies.
How often should a DO meter be calibrated?
Calibration frequency depends on the meter type, probe, and usage conditions. Generally, it's recommended to calibrate daily before use, especially for polarographic probes. Optical probes may require less frequent calibration, but always follow the manufacturer's guidelines.
What is the difference between polarographic and optical DO probes?
Polarographic probes use an electrochemical reaction to measure DO and require oxygen to reach the sensor membrane. Optical probes use a luminescent dye that is excited by light, and the quenching of this luminescence by oxygen is measured. Optical probes are generally faster and require less maintenance.
Why is temperature compensation important for DO meters?
The solubility of oxygen in water is highly dependent on temperature. A good DO meter will include a temperature sensor and automatically compensate for temperature variations, ensuring accurate DO readings regardless of the water temperature.
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