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Availability:
In Stock.
Arrives
Wednesday, Oct 14
Color: Black
Features
- [Great Digital pH Tester] A great tool to monitor pH level regularly, as the pH of nutrient solution being such an important factor in hydroponic systems. For the majority of plants, a pH range of 5.3-6.5 is considered appropriate for hydroponic.
- [PPM EC Meter for Hydroponics] Check what the TDS and EC level is in a hydroponic system, and helps you balance water to keep proper water condition. It is vital to have the correct EC and PPM level.
- [4 in 1 pH Meter] With pH TDS EC TEMP functions; General uses include hydroponics, greenhouse reservoir, DWC setup, hot tub, spa, drinking water, home tap water, well water, RO system, aquarium, and home brewing.
- [Easy to Calibration and Storage] Simple 3-point pH calibration process (pH4.0/ 7.0/10.01), comes with 2 sets of pH calibration powders. EC/TDS is pre-calibrated, right out of the box.
- [Product Design Features] Automatic temperature compensation (32-122 F), provides consistent reading regardless of any fluctuations in temperature. With LCD backlit, the backlight shuts off in 30 seconds, press any key to reopen backlight.
Description
UIUZMAR is a brand focused on water quality measurement and analysis, with a brand philosophy of providing trusted products that make testing water safety easier and more accurate. The combination of stability and technology creates UIUZMAR's innovative series of products. It has great potential and unlimited possibilities in the field of water testing. pH EC TDS Temp pH Salt TDS EC Temp pH Salt Free Chlorine ORP EC TDS Temp Multiparameter Meter can test pH, EC, TDS levels and temperature of pH up and down in hydroponics to know your water is in the perfect range. Different plants need to grow in nutrient solutions with different EC and pH values; Use UIUZMAR pH EC Meter to check EC of water, ensure pH balance. The EC range of the tester is 0-9999μS/cm, 10.1-19.99mS/cm, large range to meet your EC test needs. With ATC (32-122 ℉), it provides consistent readings regardless of any temperature fluctuations. Accurately check the EC level to help balance water. UIUZMAR digital ppm meter can accurately test the ppm level of hydroponic based water, including filtered bottled water, RO water, well water, tap water, etc. EC meter Hydroponic monitor 4 in 1 pH meter 6 in 1 pH meter
Product Dimensions: 8.66 x 3.54 x 1.97 inches
Item Weight: 7.7 ounces
Manufacturer: Jinan Runjie Electronic Technology co., Ltd.
Item model number: UMR-PH08
Batteries: 4 LR44 batteries required. (included)
Date First Available: November 14, 2023
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Oct 14
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: Black
So I’ve owned tons of pH meters over the last 15-20 years and they for the most part they have all used the same glass bulb technology, the only difference is the processor chips have gotten better on some if not most of todays pH meters. With that being said even with some of todays pH meters some have better and faster chips compared to others, ive owned tons of blue lab meters especially the meters with long cords with replaceable pH and ec/tds-ppm probes after long use they all start to wander or they bounce back and forth at some point they just stop working break and that can be an expensive especially if you rely on the your pH meters to make money. I ended up buying an OHAUS pH meter with double digit resolution and ive had nothing but problems with it especially when i spent alot of money for an inaccurate meter that takes forever to reach a stable reading time is money and wasting time waiting for a reading when you could be moving onto the next project or job can wind up costing you Quite a bit since the tine starts to add. Well thats where the UIUZMAR 4-1 meter comes into play handy, i normally take my time after receiving a product and have learned everything about a product and have used a product enough to the point where i feel confident and comfortable in leaving a detailed review that i would be willing to share with family and friends. The UIUZMAR 4 in 1 pH/EC/PPM/TEMP meter really shines in all aspects of build quality, ease of use and calibration, fast and stable readings with a clear and crisp back lit screen and the battery life last quite a while after long term use. I like that the box in comes in can be used for long term storage and keeping the meter clean and away from falling or breaking. The meter comes with its own pH calibration powders that dont require special or expensive lab grade deionized water like the old days, the newer formula works perfectly fine with everyday easy to find at any grocery store distilled water and as long as you use 250ml of distilled water you will get exact readings just make sure you either take a picture, write down or at the very least save the sachets that the powder comes in to keep the temperature to pH list available because pH can be different depending on the temperature of the liquid you are measuring and you do not want to get a false or misleading reading because of temperature. All pH does this its not the meter and for the most part you just have to be ready for it there are some super expensive lab grade pH meters that will calculate the temp to pH difference but if you’re not willing to shell out hundreds of dollars then just keep an eye out and be prepared for most of what we plan on using this meter like growing, pool or beer the temp change wont be that huge and it wont be a detrimental issue. This reader has a blue probe that reads and stabilizes so fast to the point that i have never had a pH meter so accurate and so fast that it blows my mind you do have to calibrate the pH meter after receiving it and you should by storage solution as well as ppm calibration solution(the calibration solution wont be needed for a very longtime but you should have it incase you feel its off its normal value) the ec/tds-ppm is also fast and very accurate out of the box. Keeping the probe wet with storage solution after receiving it will rehydrate and keep your meter accurate for a long time to come and you wont have to replace the probe as fast, you should not own a pH meter without having storage solution on hand, alot of issues i see ppl having with accuracy or wandering or inaccurate readings all stem from not using storage solution a very small amount goes a very long way and its very inexpensive and will save you tons of headaches and misleading readings that can cost you lots of money. This UIUZMAR pH meter comes with a manual that is very simple to read and straight to the point, it tells you how to calibrate the meter and if for some reason you have an issue comprehending the Chinese to English translation which is done pretty well for what it is they also included pictures to show you exactly how to calibrate it. Its a must that you calibrate the pH meter right after receiving it using the supplied powder starting with the pH7.00 then pH4.00 and if you plan on pH very basic solution or if you’re like me a perfectionist last but not least pH10.01 its very simple the meter will do most of the work unlike old pH meters that you have to turn screws to set the ph to the correct value although they work they are old and slow and break easy and the probes cant be replaced… yes they are inexpensive and they are very usable most ppl dont prepare the probe and meter after receiving them so most ppl have a horrible time using them just like this pH meter and any other meter you buy it has to be placed in storage solution for an hour minimum the second you receive and after the hour is up you calibrate the pH meter in the sequence stated above you must do this with any pH you purchase or use. Some companies send the probe dry and some send it in storage solution and sometimes the storage solution leaks and you then have to use the storage solution like stated earlier. The UIUZMAR 4 in 1 meter beats my most expensive meter in price to performance, speed, stability and accuracy no other meter I’ve purchased or used has worked this good and this quick and thats a testament to how far we have come in making high quality inexpensive chips and processors, companies can now offer a high quality inexpensive pH meter that rivals very expensive ones at the price of a throw away meter and still preform or outperform expensive meters… it blows my mind how far technology has Come and how anything we need is just a click away. I wasnt sure at first that this meter was going to be any good but i went with my guy and the fact that it would arrive the same day as well as had good ratings from other ppl who know how to properly use a pH meter and im glad decided to pull the trigger on this purchase, i now recommend this to all my buddies who grow and all who have bought or used my meter have been astonished when i tell them i paid $23 for this meter you really cant beat this meter and if you have used expensive meters and are tired of spending so much money on replacement probes or replacing whole meters then look no further i give you my word that if you follow the directions and maintenance of this meter you will not be disappointed. If you receive a pH meter that has white crystalline powder in a new device i promise that you did not receive a used or returned device, that is just the storage solution that ended up leaking during warehouse storage or shipping and handling, all you have to do wash it off used distilled water to clean it off you can use tap water to rinse the unit in between uses but clean distilled water is much better. follow brand new pH meter procedure for an hour calibrate pH only and then use.
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Reviewed in the United States on July 14, 2025 by Eric S
Color: Green
This is a very nice beater. The probes are protected in the screen is bright. It also comes with calibration kit. So far it looks like a very solid piece of equipment. PH comes up right away and does not fluctuate.
Reviewed in the United States on August 31, 2026 by Eric
Color: Red
Very accurate and easy to use
Reviewed in the United States on September 29, 2026 by bretsmyth
Color: Black
Works well and keeps its calibration. It reads a little high, but it works great. I use it for my spa, and it reads about .2 high on pH, but it's cheap enough to leave outside, so I'm happy.
Reviewed in the United States on February 10, 2026 by Erik
Color: Green
Used it for a few days. I felt the Ph measure was off, so I did a calibration. After that I used it once with reasonable measure. However, the next day it was off again. This time the Ph was stuck at 14.1 for a plain water. I cannot calibrate any more. Tried to turn it off and on. Nothing worked. I just returned it. Please be warned. Amazon recommendation, even with 4.4 review does not change the fact that this product is a trash.
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Reviewed in the United States on August 31, 2026 by frank
Color: Black
Had a good run with this thing had it for couple yrs now and the bulb popped this morning on me other then that it work perfectly fine never had to calibrate it
Reviewed in the United States on July 4, 2026 by rachel
Color: Black
I'll keep it short, (yeah right)! but as far as these pens go I am a hardcore stickler when it comes to these pens and use several different types and brands that I have meticulously calibrated. When I ph my water I use two or three different pens and compare them for consistency and accuracy. After passing my rigorous calibration process I make my decision to keep or return it if it doesn't work perfectly. This pen has a large backlit display and is accurate to .01. Pens accurate to .1 are worthless because of the broad range in the reading. You can't determine it's accuracy. I first dipped this pen in a ph solution of 7.00 and it read 6.89. Not bad for right out of the box. I then calibrated using my very meticulous 3 part solution process of 7.00, 4.00, and 10.01. The pen now reads the solutions to a T. Calibration successful. I use this with other pen when checking p.h. and this pen reads within .01 which is almost perfect. So if said other pen reads 6.27, this pen will read 6.26 to 6.28 which is as close as your ever going to get! I've lost several plants due to stunting and nutrient deficiency because my ph was way off. I can't stress enough how important this is to the health of your plants. I have four other $25-$30 pens and this is my favorite along with one other that is similar. Make sure it has a large backlit display, and is accurate to .01 or in my opinion is a waste of time and money. Use a 3 part solution for calibration. Some pens use different values. All my pens calibrate to 7,4, and 10.01. I only buy ones with these values. Try to use solution not the powder you mix with water, if you can. Keep the pen cap in electrode storage solution even if your pen doesn't have any included. Just cut a small piece of sponge and put it in the bottom of the cap and wet it with solution. You can used distilled water if you don't have any. Buy a 12 dollar calibration solution kit with storage solution. Practice calibrating Al least every two weeks to keep your instruments in check.
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Reviewed in the United States on February 13, 2025 by Jesse Pierson
Color: Red
Growing buds and want to take it to the next level? This TDS/PH meter is exactly what you need! I went through 3 other models trying to find a good one, and before I got a BlueLabs this was my last attempt at a cheap one - and so glad I did! It’s packed with the same features as the $100 testers at a 1/4th of the price. It has the blue glass diode, which reads SUPER fast and settles on a PH in 1-2 seconds compared to the cheap ones that fluctuate and take ages to settle on a value. Calibration was simple and straightforward, but did only come with one packet of buffer so you may want to get some more if your super concerned with accuracy. For me - I don’t care if it’s 6.12 or 6.15 when it should be 6.10… as long as the ball park is right I’m happy. My plants like 5.5-6.5 so for what I need it was perfect! The TDS is both in PPM and EC which is really nice, and having everything on one meter is a breeze to check my feed water and run-off. I found I was getting salt build up in my soil, so now I test runoff every day and rotate between nutrient solution and plain PH water to flush it out when the PPM gets too high in runoff. Overall I’m extremely happy with my purchase and found it was an amazing value for what I paid. I would highly recommend it to anyone looking for a higher quality hobby grade meter where it’s not life or death if your 1/100th off on PH or TDS. Despite that, I’ve compared with the $100 Apera and $90 BlueLabs at my buddies house and found all three match in readings and speed of sample analysis, so don’t think I’ll be spending any more money and just keeping this as my go-to. Hope it help!!
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Reviewed in the United States on October 3, 2025 by Trikie_Dik