A dissolved oxygen meter is a tool that measures the level of gaseous oxygen dissolved in water. The uses of a dissolved oxygen meter are many. To maintain the perfect oxygen level in the aquarium, fish hatcheries, or groundwater remediation, or for many other purposes, people prefer having a dissolved oxygen meter in their collection.
You have clicked on this article means either you are looking for a dissolved oxygen meter or need some information regarding DO. If so, we have added the eight best DO meters that you can choose to alleviate your necessity, along with some information discussed in the later section of this article.
Among all of the items, Apera Instruments AI480 DO850 Optical Dissolved Oxygen Meter Kit will remain as our top pick for today.
Best Dissolved Oxygen Meter
1. Apera Instruments AI480 DO850 Optical Dissolved Oxygen Meter Kit
Our first suggestion for a DO meter is from Apera Instruments, LLC, and it is the AI480 DO850 Optical Dissolved Oxygen Meter Kit. The optical DO sensor equipped with this device is reliable enough to measure the dissolved oxygen level in the water sample accurately. If you are looking for an item that will keep you free from the hassle of maintenance, this one with the solution and membrane-free construction will enable you to do so. Saturated air and zero Oxygen will not be a matter of fact with the easy calibration feature added to this item.
This one is ideal to use in any harsh environment with the IP67 waterproof and dustproof construction. With this item purchase, you will geta complete meter kit, including the DO meter, 10 ft optical probe, calibration cap, and a rugged carrying case.
- Manufacturer: Apera Instruments, LLC.
- Optical DO sensor.
- Solution and membrane-free
- easy calibration.
- IP67 water and dustproof.
- Includes: DO meter, 10 ft optical probe, calibration cap, and a rugged carrying case.
2. Extech DO600 Waterproof ExStik II Dissolved Oxygen Meter
This DO600 Waterproof ExStik II Dissolved Oxygen Meter from Extech is our second recommendation for a DO meter. This one can withstand any temperature from 0 degrees to 50 degrees Celsius. The screw-on membrane cap with optional extension cable will make the replacement of the membrane much easier. The DO sensor attached to this item is convenient enough to provide you with an accurate DO perimeter. This one features adjustable Altitude Compensation and adjustable Salinity Compensation, allowing you to have more beneficial features in a DO meter.
This meter can store up to 25 data sets with DO and Temperature reading. This one can provide accurate measurement and has self-calibration on power-up and Data Hold, Auto power off, Low battery indicator functions to make it trustworthy.
- Manufacturer: Extech
- 0 degree to 50 degree Celsius.
- Easy membrane replacement with screw-on membrane cap and optional extension cable.
- Accurate DO sensor.
- Adjustable Altitude Compensation and adjustable Salinity Compensation.
- It can store up to 25 data sets with DO and Temperature reading.
- self-calibration on power-up, as well as Data Hold, Auto power off, Low battery indicator functions
3. Milwaukee MW600 LED Economy Portable Dissolved Oxygen Meter
In the third place, I have added this MW600 LED Economy Portable Dissolved Oxygen Meter from Milwaukee. This one will have an automatic temperature compensation from 0 degrees to 30 degrees Celsius. The two-way manual calibration makes this a worthy choice for anyone looking for a DO meter for educational, aquaculture, water analysis, and environmental analysis applications.
The LCD screen attached to this device is more than convenient. This one is a portable DO meter allowing everyone to carry it for different purposes. The polarographic probe with a 3m cable and screw-on cap membrane makes the membrane replacement process easy.
- Manufacturer: Milwaukee
- Automatic temperature compensation( 0-30 degrees)
- Two-way manual calibration.
- Suitable for educational, aquaculture, water analysis, and environmental analysis applications.
- LCD screen.
- Easy membrane replacement with the polarographic probe and a 3m cable and screw-on cap membrane
4. YSI 5563 Dissolved Oxygen/Temp/Conductivity Sensor Meter
This 5563 Dissolved Oxygen/Temp/Conductivity Sensor Meter cable from YSI is our fourth recommendation on this list. This one can be a worthy choice for all of those looking for a DO cable. This one is a handheld multi-parameter instrument that you can try out. This cable's whole length is 10 meters, making it suitable and convenient for a long-distance measurement. This item will provide a 1-year warranty so that you can remain sure about the quality of it.
- Manufacturer: YSI
- The perfect cable for Dissolved Oxygen/Temp/Conductivity Sensor Meter
- Handheld multi-parameter instrument.
- 10 meters long.
- 1-year warranty.
5. YSI Pro Series 4 Meter Cable Assembly for Dissolved Oxygen/Temp Meter
Another cable from YSI is our fifth recommendation that you can try out in case you need one. YSI's 4 Meter Cable Assembly is suitable for most of the DO or temperature meter. Like the previous one, this one is also a handheld multi-parameter instrument that will make your measurement easy by providing enough space and room. Many people prefer having a customized cable so that the measurement process gets more manageable; for all of them, this one should be a worthy choice to pick up.
- Manufacturer: YSI
- The perfect cable for Dissolved Oxygen/Temp Sensor Meter
- Handheld multi-parameter instrument.
- 4 meter long.
- 1-year warranty.
6. Orion 3-Star Plus Dissolved Oxygen Benchtop Meter
From Orion, this 3-Star Plus Dissolved Oxygen Benchtop Meter is our sixth recommendation for you to try. This one will have a measurement rate of up to 90 ppm, temperature compensation -5 to 105 degrees Celsius, and 600 percent saturation making it a flexible item for any purpose. In most cases, accuracy gets the highest priority while choosing a DO meter.
This one will not disappoint you with BOD, atmospheric pressure, and temperature parameters, providing you with the accurate and exact measurement of DO in the water sample. This one will allow multiple users to use this item with password-protected encryption. Another reason to choose this item is that this one will show the membrane and solution measurement printed on display.
- Manufacturer: Orion.
- Measurement rate: 90 ppm.
- Temperature compensation: -5 to 105 degrees Celsius.
- Saturation: 600 percent.
- 100 % accurate with the BOD, atmospheric pressure, and temperature parameter.
- Password-protected/ suitable for multiple users.
- Solution and membrane measurement printed on display.
7. Oakton WD-35643-13 Eutech DO 6+ Dissolved Oxygen Meter
This WD-35643-13 Eutech DO 6+ Dissolved Oxygen Meter from Oakton Instruments is our seventh recommendation for you to try as a DO meter. This 6+ DO meter will reduce your maintenance cost to a great extent so that you can enjoy accuracy with less expense. Unlike most other DO meter, this one will not require any warm up time. This machine will have a protective rubber boot that can also be used as a benchtop stand. The perfect LCD attached to this item will show the parameter in ppm or mg/l parameters.
This one will have six simple buttons that will allow you to measure freezing readings, toggle between display units and temperature results, setup, calibration, and automatic barometric and salinity compensation after manual parameter inputs. Electrode diagnostics will be easy with the view of electrode slope, zero offset, and millivolt values.
- Manufacturer: Oakton Instruments.
- Reduces maintenance cost.
- No warm-up requires.
- LCD shows readings in ppm or mg/l
- Six simple buttons for easy maneuvering.
- Easy electrode diagnostic.
8. Hach 8505100 HQ30d Portable Meter Package
I have brought an item from the Hach company as our final and last recommendation for a DO meter. If you are looking for a rugged DO meter suitable for field water testing, then this one should be the appropriate item to pick up. The intuitive user interface will be handy when providing simple operations, reliable and accurate results.
The Intellical smart probes will store all kinds of calibration in one probe making it more suitable and worthy. This one is portable, allowing you to carry it wherever you go. If you are looking for a reasonable DO meter filled with almost all facilities, this one should be the exact item to pick up.
- Manufacturer: Hach Company.
- Suitable for field water testing.
- Rugged DO meter.
- An intuitive user interface makes it easier to operate.
- Reliable and accurate results.
- Intellical™ smart probes stores all kind of calibrations.
- Portable to carry anywhere.
- Reasonable price.
This article is also not going to be an aberration. If you are thinking about choosing a new Dissolved Oxygen Meter, then here are some of the most important things that you should not miss while buying a DO meter.
The first thing that you need to ensure is the accuracy of the machine. One of the best ways to ensure accuracy without trying the item is to read reviews of people who are already using the item you are aiming to buy.
Some DO meters will require some warm-up before providing you the readings. You should pick up an item that will have a dynamic and instant response rate.
Calibration is another crucial aspect that you should pay an excellent concentration to have the best item possible.
Temperature compensation, solution compensation, and biometric pressure compensation systems of the machine should also be noticed.
The saturation rate of the machine plays a vital role while measuring the dissolved oxygen level. Make sure that you know everything about the saturation level.
Some of the other essential features that you might look at for having a better convenience are as follows- cable or probe, a good LCD, integral membrane cap, storage sleeve or chamber, data storage system, charging facility, and many more.
Types of Dissolved Oxygen Meter
There are three different types of Dissolve Oxygen meter that you will notice everywhere. Giving a thorough description will make this article longer. To provide you with some sudden insights about all three kinds of dissolved oxygen meters, here are the definitions of all three-
Polarographic or Clark sensor
Polarographic or the Clark sensor is the most common kind of DO meter that you will notice. This type of system uses gold or platinum as the cathode and silver as the anode to provide the exact and accurate measurement. If you are a student of science, you probably know how cathode or anode works. But, if you are not, to make it oversimplified, cathode and anode are like the plus and minus of a battery.
Another kind of DO meter that you will find in the market is the Galvanic sensor. Unlike all types of batteries, this kind of system uses Oxygen as its fuel. I would love to mention that these are quite expensive kinds of DO meter you will find in the market. This kind of system tends to produce is swept response rate.
Fiber optic Oxygen sensor
The last kind of DO meter you will find in the market is the Fiber Optic Oxygen sensor. This system will have an optical fiber with a sensor tip that contains a thin layer of Oxygen. If you are looking for a DO meter for using indoor, then this one might be the solution. However, they tend to have a lower response rate than the Galvanic sensor.
How to operate a DO meter?
Well, If you are asking this question, then I have t mention that there are thousands of different kinds of DO meters available in the market. Almost all of them tend to have some programs that are entirely different from others. To understand the user interface, it would be better if you look at the manual guide .pdf. Every DO meter will come with a manual guide inside the package. Read the whole manual guide at least once to have a better understanding of your DO meter user interface.
From fish culture to groundwater purification, a DO meter can produce great help. If you are working at the field level, it becomes essential to measure the oxygen level in the water sample. There are many kinds of DO meters available in the market. Before confirming the purchase, you need to decide whether you are purchasing this item for indoor or outdoor use. After determining, according to your preference, choose the appropriate item that can make your work easier.
Last Updated on June 16, 2022 by Tufail