YINMIK Dissolved Oxygen Meter Digital Dissolved Oxygen Test kit for Aquarium Oxygen Tester for Koi Pond Do Meter for Wastewater Smart Dissolved Oxygen Meter with 9.84ft DO Probe Cable for Aquaculture
Original price was: $69.99.$54.99Current price is: $54.99.
Price: $69.99 - $54.99
(as of Oct 22, 2025 11:30:31 UTC – Details)
From the brand
Aquarium Test Kits
Aquarium pH Salt Test Kits
Package Dimensions : 9.72 x 8.15 x 2.24 inches; 1.41 Pounds
Item model number : YK-9100A
Date First Available : May 1, 2025
Manufacturer : JiNan Huiquan Electronic Co., Ltd
ASIN : B0F93KHLHT
Best Sellers Rank: #99,069 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #6 in Dissolved Oxygen Meters & Accessories
Customer Reviews: 3.7 3.7 out of 5 stars 37 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
[Professional Dissolved Oxygen Meter]: YINMIK dissolved oxygen tester test oxygen in water by two modes [mg/L mode (dissolved oxygen content in water, 1mg/L=1ppm) and % mode (saturation percentage)]. The DO meter also read temperature for fish tank.
[Test Accurate Dissolved Oxygen Content in Water]: With a resolution of 0.1mg/L, the digital dissolved oxygen meter provides accurate & consistent DO content readings to work with environmental monitoring and sewage treatment. The extended 9.84ft DO probe cable provides a more convenient test method for outdoor pond monitor.
[DO Test Kit for Hydroponics and Brewing]: YINMIK dissolved oxygen meter can help hydroponics practitioners accurately control DO, and improve their nutritional value. In addition, for beer & wine brewers, this YK-9100 dissolved oxygen meter can help them maintain the high quality and unique flavor of beer and wine.
[More DO Value with Salinity & Altitude Compensation]: By inputing altitude & salt compensation in YINMIK APP, YINMIK smart DO meter provides more accurate dissolved oxygen level. And the DO meter is designed with ATC function to prevent temp changes from affecting accuracy of DO test. Moreover, You can store 1,000 data through the APP; and set custom alarms for DO thresholds.
[Complete YINMIK Dissolved Oxygen Test Kit]: With zero oxygen water, electrolyte, replaceable oxygen permeable membrane & detailed instructions, YINMIK dissolved oxygen tester is suitable for any water, as hydroponics, fish tank, brewing, aquarium or aquaculture, environmental monitoring, educational experiments.
6 reviews for YINMIK Dissolved Oxygen Meter Digital Dissolved Oxygen Test kit for Aquarium Oxygen Tester for Koi Pond Do Meter for Wastewater Smart Dissolved Oxygen Meter with 9.84ft DO Probe Cable for Aquaculture
Add a review
Related Products
Original price was: $69.99.$54.99Current price is: $54.99.
Beau –
Worth It
GreatWay better than all the others
Loiz92 –
Muy bueno
Muy practico y preciso, su calibración es sumamente fácil y la conexión con un dispositivo Android en rápida y segura
DWilly –
Doesn’t work
I followed the directions that came with the meter and was unable to successfully calibrate it, which makes the meter useless.
Lou P. –
great choice for auto detailers
Small size, batteries already installed, cheap clip on the back is easily removed.  The probes are protected by a removable cap that just slips off. I kept the firm foam cutout packaging so as to preclude damaging the unit over time.Display is readable and the 3-button user interface is straightforward once you review the manual.  The manual is brief but complete and clear.  Reading it closely for comprehension is key to getting the most out of this tool.  Not that the subject is overly complicated – like anything else one needs to become familiar with a tool to use it well. My town water tested at134 TDS.  This is an electrical conductivity meter; dissolved minerals will increase the conductivity and therefore the reading value. For auto detailers this is an important thing. Dissolved minerals, if left to dry on the paint cause water spots. If not removed by actively drying the vehicle off, or using water spot remover, the result will look splotchy and the paintâs clear coat will eventually become permanently damaged. The easiest problem to fix is the one you avoid in the first place.It is not always practical for mobile detailer to tote a large tank of deionized water to their jobsites; many mobile detailers resort to using the clientsâ water when  possible. If the client has well water it may have a lot of dissolved minerals so having this little meter handy on-site allows the detailer to know beforehand to switch to a rinseless wash method, using the bit of water he should have brought along.  Saves a lot of headaches and yields a happy client.I like this meter it is small, does what it claims to do and for a mobile detailer this really helps avoid troublesome water spots and a dissatisfied client.  You often donât need a fancy calibrated instrument to make a good decision.  I do recommend this.
T-Sizzle –
Tricky calibration
I really wanted this to work. I have a koi pond and a smaller goldfish well on my property and wanted to know if I needed to add more aeration to either one of them.I’ve used digital pH and salinity testers before and pretty much have not had any problems calibrating those meters.This is a much more delicate and involved test apparatus that involves filling small tips with an electrolyte solution. The tips have a thin plastic membrane on the bottom that the tip stretches over a probe on the end of the tester.It requires a zero-oxygen calibration to be done before its first use and comes with a zero-oxygen solution to do this. I followed the directions closely, and the readings on the meter would just not get anywhere close to a value I could perform the zero calibration on.I communicated with the seller, and they sent me a new zero calibration kit. I also watched a few other YouTube videos about dissolved oxygen meter calibration and gave it another try. This time it got really close to the recommended value, so I think I got the calibration close.My koi pond’s water tested at over 100% dissolved oxygen. I’m not sure I believe that, but there is some pea soup algae in the water that could be adding additional oxygen…so it’s possible.The water from my much less aerated goldfish well came in at 80% dissolved oxygen and did go up to around 92% after running the well’s fountain for a few hours. From what I’ve googled, these are reasonable values.I feel like the calibration instructions could be a lot more detailed. I’m just filled with doubt over the accuracy of the readings after such an arduous and uncertain calibration process.
Robert G. –
Only good for limited applications.
I use a dissolved oxygen meter as part of my job troubleshooting municipal wastewater treatment facilities, so I understand these instruments and use them extensively. This DO meter was provided to me through the vine program, but this review is honest. I followed the instructions carefully for installing the membrane, zeroing the meter, and then “calibrating” it. After using it briefly, I realized that this meter does not have automatic temperature compensation and its calibration value is 100% of the DO in the atmosphere, no matter what altitude you are at. Most DO meters have ATC and when you calibrate them, you are either adjusting the saturated air calibration value to the altitude you are at or to a barometric pressure reading. This meter does neither…it simply sets the calibration value at 100% saturation. Without accurate calibration or ATC, there are very real limits to how you can use this meter. It does come with a chart that allows you to correct the measured DO reading for altitude, but this is a crude way of getting there. If you are measuring DO in a fish tank and the readings are near the saturation value, it will give you reasonable data, but if you need to read down near anoxic conditions (zero DO), I found this meter to be very inaccurate in this range. See the photos of my comparison against my professional DO meter (YSI model 55) in my koi pond, which is aerobic in the upper layers but anaerobic on the bottom. The offset of this meter from my YSI meter near saturation is around 1 mg/L (not great, but understandable given the calibration approach), but at low DO readings, this meter was off by 3 or 4 mg/L, which is completely unacceptable. If you need accurate DO measurements from a durable meter, this is not the right product. If you will be using a DO meter for wastewater treatment work, go find yourself a good used YSI or HACH unit.