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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.
Dissolved oxygen refers to the concentration of molecular oxygen dissolved in water, generally expressed in mg/L (ppm) and saturation percentage (%), which is the percentage of dissolved oxygen in 1L of water. Dissolved oxygen meter can quickly and...
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.
Convenient Functions:Dissolved oxygen meter adopts the digital screen display with backlight, which is more clear and convenient to read data. Auto power-off in 8 minutes if not using it. Low battery indication. Our instruments have temperature...
Dissolved oxygen meter for Hydroponics: This oxygen meter is an essential tool for monitoring the oxygen content in various indoor gardening setup, such as DWC, hydroponic reservoir, aquaponics, hydroponic towers. Maintaining this level at a healthy...
Pond Water oxygen meter for Fish Tank: Monitors the aquatic environment for various fish species, including freshwater fish, koi ponds, aquariums, saltwater fish, and coral tanks; suitable for aquaculture; helps maintain the health of your...
3.6ft Probe & Backlight: EZTOCH DO meter is equipped with a 3.6-foot/1.1-meter electrode line. The long probe can reach deeper water, which is especially useful when testing deeper tanks (DWC tanks) or outdoor installations (tank/ponds); the backlit...
APP Connection: Connects to the YINMIK app to store data, up to 1000 values, eliminating the need for note-taking; maximum and minimum values can be set in the app; when measured values exceed these ranges, they will be displayed in red to remind you to...
Dissolved Oxygen Tester Range Unit: The Dissolved Oxygen Tester allows you to view dissolved oxygen measurements in % or mg/L. The meter accurately measures dissolved oxygen (DO) in the range of 0.0-300.0% or 0-40 mg/l. The DO probe has a built-in...
Accurate and Stable Dissolved Oxygen Test Kit: Digital Dissolved Oxygen (DO) Meter with built-in temperature sensor, automatic temperature compensation, measuring range 0-50℃. Uses the latest chips and algorithms for faster readings and more stable...
Wide Range of Applications: The Yewick Dissolved Oxygen Meter is good for measuring dissolved oxygen levels and temperatures in a variety of environments including aquariums, fish tanks, koi ponds, beer brewing, aquaculture, wastewater treatment plants...
Easy to Use Oxygen Water Meter: The Yewhick dissolved oxygen (DO) meter With two-point automatic calibration of 0% and 100%, it is easy to calibrate; With a large LCD screen and polarographic probe with 1.1m cable. With the automatic shutdown, its battery...
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.
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...
[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...
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...
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...
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
Last update on 2026-10-15 / 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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