VIVOSUN 4-in-1 Digital pH Meter with pH/TDS/EC/Temp Function, 0-14.0 pH Measurement Range, ±0.1 pH Accuracy Water Quality Tester for Hydroponics, Household Drinking, and Aquarium

I usually use a different meter...but that one was not working (I had let it sit too long and I could not calibrate it) so I went looking for a good meter. I landed on this one as it was highly recommended, so I figured why not. So I began my grow Back in Sept with this dual pen and as you can see, it's been amazing throughout the entire grow. I am about a week out from harvest. When I say she works really well, I mean she works really well! You do kind of have to get used to calibrating it but after that it's a breeze. If you need a good pH pen and a TDS meter, I highly recommend you grab yourself one of these.

Great meter for the price. Would definitely recommend this meter.

UPDATE vivosun once again goes above and beyond. They appreciate there customer and they will make sure your happy on way or anotherIt bounces around and isn't accurate I calibrated three day in a row. I store in kci storage solution. Kinda disappointed cause I rep vivosun all day. They make great products just unlucky on this one I guess

Just another piece of underbuilt plastic crap like everything else in this whorish industry. This thing seemed to be pretty good for about a year and a half, but at this point it's just constantly failing. The measurements shift every day, sometimes by more than a full point.(Not .01 or .1, A WHOLE POINT!!!) Every single freaking day I have to correct the calibration not only before I use it, but generally I'm correcting the calibrations 2 or 3 times before I have my solution mixed. It is INFURIATING!!! With increasing frequency, when I calibrate, it sets the calibration to 9.12, then it starts cycling through random nonsense on the screen and refusing to take any measurements. Sometimes when I pop the batteries out and give this godawful piece of junk a minute to pull itself together, it will start working again. Sometimes it doesn't and I have to wing it. My plants are on the home stretch of their 3 month process and I swear... if they get messed up because I can't pH my solutions at the final hour I am going to go INSANE on these mugs. I've tried new batteries, that's not the problem. While I'm on the subject though, the battery charge indicator on this absolute failure piece of junk doesn't even work anymore. It either shows completely full or fully depleted, nothing in between. My neighbor has got to hate me by now based on how often I find myself screaming profanities at this awful device. And look, if this were one of those very cheaply built $10 meters, I'd understand that one gets what they pay for. But this thing cost real money. It's NOT a cheap piece of junk, it' an overpriced piece of junk masquerading as a well built device being sold by a company that claims to build quality products. (Hint, they don't) Looks like the only way to get a reliable pH meter is to spend nearly 100 bucks, so I guess that's what I'm going to do. Bye-bye Vivosun, it was nice knowing you. Never again. Pull your heads out of your rear end and build us reliable products for once. ** Edit: I just spent $170 on an Apera. When I saw it was on the truck I took this PIECE OF CRAP and smashed it into 100 pieces. Let me tell you, it felt pretty good to do that. I'm done with Vivosun, fake-ass junk. All these other rip-off knock-off sellers, too. Buy once, cry once. Lesson learned.

As far as mid-range ph meters this is a decent meter. I had decided to upgrade from the black and yellow ph meter to this one and when compared its night and day. This meter has a backlight which I love it came pre-calibrated off by maybe .1 or .2 nothing that would really effect anything when re-calibrating was super easy with RO water. I tested this side by side my cheap black and yellow (11 dollar) ph meter and could deffinatly tell i needed a upgrade the black and yellow would be completly off even after re-calibration this one held calibration through and through even after doing several ph readings with diffrent liquids and water no issue. the PPM I couldn't really tell as I compared it with the blue reader ( cheap one) and came out basically the same so I can assume its accurate out of the box.

Product broken only few months in. I use it evwry othwr day for qatering but for 40$ id expect a little longer use. Ive gone through 2 pens already this red one and a grey one. Recalibration does not work. Pen is 100% broken i went to website for troubleshooting and on youtube. I always buy vivosun for all my garden needs. But might not ever buy a pen from them again...picture is the same solution. Couldnt get video it spazzes out from 2.00 to 5.00 ph goes everywhere

I just bought this pen. It came with three packages of powder for me to do pH calibration, but no powder for EC calibration where do I get to buy it says sold separately I need to know where I think an instrument like this should come with everything needed

Easy to use and read. Works very nicely. Even those it doesn't read all the other options for the fish aquarium like the EasyStrips. Only read PH and PPM. All good.

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I got it yes it was very good

apresentou problema com menos de dois meses. nao esta preciso e sem confiança

Fonctionnes très bien très satisfait

Amazing value and came with warranty for peace of mind