YINMIK pH Meter, Digital pH Tester for Hydroponics, pH Temp Meter with Horizontal Display for Pool, Spa, Hot Tub, Indoor Plants, Koi Ponds, Drinking Water, Wine Beer Making, Aquarium, Aquaculture

This digital pH meter is a must-have for anyone who needs precise pH readings. It’s easy to use, with a clear horizontal display and quick, accurate measurements. I’ve used it for my hydroponics setup, aquarium, and even my pool, and it works perfectly every time. The temperature reading feature is a great bonus. Highly recommended for both beginners and experts!

I needed a quick replacement when my other ph pen died. This pen filled the roll incredibly well. The included temperature gauge is an amazing value and seems relatively accurate. I have not tested the temperature against another meter. The other brilliant feature is the backlight display that auto shuts off after about 10 seconds. you can still see the reading, but the backlight turns off to save battery. accuracy - this pen, When tested against my Milwaukee ph pen shows a difference of only .1, this is without calibrating the YINMIK ph meter out of the box. reliability - used for only about a month so far without issue, will update if it fails. accidentally fully immersed the meter in water for 2-3 seconds. dried the exterior and it remains fully functional. support your local brands when you can, but this is a GREAT backup pen.

I'd buy ten of these before I'd buy another $100+ brand. My first one worked for about 3 months before it wouldn't calibrate properly and I notified the seller who immediately replaced it. Their service was timely and responsive. The device itself functions as intended with a clear LCD, auto off, etc. The inclusion of calibration packets is a huge plus.

Great little meter. The solution stays good well over 15 days. It will give super accurate results if you calibrate with all 3 solutions, but since I only need +/-.1 accuracy, a once or twice daily calibration (which takes 15 seconds) if sufficient for me.

Works as advertised. Use for testing ph of syrups I make for mixed drinks. Keeping ph below 3.7 helps with shelf stability. I have a grenadine syrup I made that I’ve been using for about 8 weeks now just sitting in a cupboard. Device was calibrated fine out of the box. Be sure to purchase KCL probe solution to keep the sponge that is in the cap damp. The sponge was damp when I received the probe. The probe should never be allowed to dry out. You will also need calibration solution or powders and distilled water to make your own.

I’ve not been this frustrated for a hot minute. I just spent the better part of two hours going back and forth calibrating and re calibrating this stupid pen trying to stabilize the readout and it just won’t work. It reads properly for the test liquids at first and then when I go to actually use it for something I NEED it for and what prompted the purchase to begin with- it DOES NOT WORK. The readouts are off by over 2 whole points nearly every time. Even just testing it to see if it was a fluke, I tried reading my distilled water and it’s telling me it’s at 4.9-5.8 when I know dang well it sits at a perfect 7.1 every time. This pen is utter garbage - unless I got a bad one? I dunno. This has been SO frustrating!

Love this lost cost meter for pH testing, but make sure it's calibrated and heed my WARNING: the glass probe breaks if it dries out (that's why they include a dropper and sponge inside the cap). Keep the sponge wet with 3-4 drops of pH 4 buffer and store in a Ziploc to save it (reapply every few days). Also DO NOT DROP IT. These warnings are NOT IN THE MANUAL so ensure you follow them or your meter will break quickly and need to be replaced.

Inexpensive little meter. Needs calibrating more often than I would like. For the price it’s acceptable.