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📊 Precision pH testing, anytime, anywhere—because your projects deserve the best.
The General Tools PH501 is a pocket-sized digital pH meter designed for professionals needing accurate, on-the-spot pH measurements. Featuring a clear digital display, automatic temperature compensation, and lightweight design, it runs on a 9V battery included for immediate use. Ideal for cooling towers and fieldwork, it combines portability with precision.




| ASIN | B001TOC3LK |
| Brand | General Tools |
| Customer Reviews | 3.2 3.2 out of 5 stars (13) |
| Global Trade Identification Number | 00681035413500 |
| Item Weight | 0.55 Pounds |
| Manufacturer | General Tools |
| Manufacturer Part Number | PH501 |
| Model Number | PH501 |
| Mounting Type | Freestanding |
| Operating Humidity | 20-80% |
| Temperature Accuracy | 0.1 degrees_celsius |
| UPC | 681035413500 |
| Upper Temperature Rating | 132 Degrees Fahrenheit |
| Voltage | 9 Volts |
M**L
muy mal hecho,
T**R
I have purchased othe Ph meters and Ph papers. This tester goes up, down, random numbers.
R**N
It continuously displayed random ph reading, non-stop. Turns out, it was broken to begin with. Returned immediately and received full refund. Decided on Phinex Diagnostic test strips, not very hi-tech but works perfectly.
T**A
We have had this meter for 5 years. It works great and we hardly ever have to re-calibrate it.
A**R
Since buying this item, and calibrating it with the solution provided, I have yet to recalibrate. Stays accurate and readings are precise....can't understand why some poor reviews were posted. I highly recommend this product!
Trustpilot
3 days ago
2 weeks ago