Review on High-Quality Replacement BNC Electrode Probe Connector Cable Sensor for pH Controller Monitor Tester Meter Kit Set - Ideal for Seawater, Saltwater, Hydroponics, Aquarium, Plant, Pool, and Spa with 0-14 pH Range by Tyler Cooley

So far this product does exactly what it says on the tin. I just received it yesterday and am currently using it. It says it works for long-term use and all you need to change after long-term use is the probe, so we'll see. Calibration was easy. It even had a conversion chart on the back of the solution if your distilled water wasn't 25 degrees so you didn't have to play games to get it to the right temperature, you can calibrate it at any temperature of your water. while the tempo was on an even number, like 10 20 30, not 26 18 or something like that. It was delivered ahead of schedule and so far the packaging and production has been great! If I wake up tomorrow and this thing dies, I'll be pissed. Also, I plan on buying a $100-200 system because I know you get what you paid for. So I will be using Blue-Lab equipment because I don't just grow once and after 4 grows I can buy Blue-Lab as many times as I need to buy or replace this probe. I'm hoping I can get a four plant veg out of this for $40. If I get it I'll give it five stars, but if he reads some stupid testimonial in two weeks I'll demand my money. The upside is that it comes with a one year guarantee so I might get two crops from this bad boy, only time will tell but as with this review I'm pretty happy with it for now, well worth a try. Your first growth! Separate counters that don't take Remo into account is a waste of time, so this works and you can leave it in the solution.