Digital Combo pH & Temperature Meter, Aquarium Thermometer pH Monitor with Automatic Calibration Function for Fish Tank Hydroponics Aquaculture Laboratory

I’m using this in a hydroponic setup. It works great. One difficult thing is measuring out the calibration solutions. I have access to a lab, with scales and distilled water, but I don’t know how others would do this easily.The unit performs very well. Initial calibration is important to get accurate pH readings. But once you set it up, you don’t need to recalibrate often. The only time I needed to recalibrate was when I forgot to store the probe in the solution. Important: you never want to store the pH probe dry. It will become Un-calibrated and lose proper function if done repeatedly.Overall, it’s a really nice pH probe at a reasonable cost.

The delivery was on time and the ph and temp are nice and big onn the screen and it is very easy to start. I do recommend watch a video to set it up.

The media could not be loaded. This device is easy to calibrate and mounts to a fish tank or wall adjacent to the fish tank nicely. This product is new to me so I’m still learning it however it seems to be pretty accurate or should I say very close to accurate my only issue with it is I believe if you have a device that’s made to be secured to a fish tank, and or a wall, there should be some kind of suction cup or bracket to secure the probe as well. This probe is an odd shape so it takes a little bit of customizing to make an average suction cup work. That’s really my only complaint at this point as far as the batteries go , this is been working with the set that came with it for just over three weeks now so it doesn’t appear to take or use up batteries very quickly. Hope this helps.

I have purchased many budget ph meters. By far the best. It has been on the same set of batteries it came with over a year ago. I have dropped, submerged, and just unintentionally abraded this thing along every bend and it's is just now starting to show signs of needing a replacement probe. Does have about a .2 variance depending on how well the probe is seated in its socket. Would highly recommend for those who cannot afford more expensive options.

Initially this unit worked great, but after a few months the ph was off. I recalibrated and it was fine, but again shortly it was off. I replaced the ph probe, and same result. Temperature readings are accurate .

Typically runs about 2 tenths off. I compare it to my Apera occasionally. I use this on my outdoor RDWC system and wanted something to monitor the temp and PH without having to take the good meter out with me every time. Then run the risk of forgetting it out there. But for the price it is exactly what I was looking for.

Because it's battery operated, the LED is not so bright. Most of all, it's very inaccurate after 3 weeks of use only. Reading was about 2+ higher than my other ph meters like average 9.5!

I've been using this meter for ~ 4 months now, and have checked it against my BlueLab PH meter whenever it had a suspicious reading. I'm happy to report that the readings always compared very closely. I HAVE noticed that it took about 10X longer to get a stable reading compared to the BlueLab which was instantaneous by comparison. Since I'm using it for long term readings in my nutrient reservoir, this is not a problem for me.