The Extech PH60: Waterproof pH Pen with Temperature. This particular test instrument has a pH measuring range of 0 to 14, the entire pH scale. It also has a temperature measuring function.
The temperature range of this device is from 0 to 50 degrees C, which is 32 to 122 degrees F. The pH and temperature test results will then be shown to you at the same time on the dual LCD display. The data hold function freezes the current readings that are shown on the screen so that you have time to note them down elsewhere.
It also comes with an Automatic Temperature Compensation function and, because it can never hurt to have more accuracy when it comes to measuring pH and temperature levels, it also has a choice of a three-point calibration. And finally, there is also a single CAL key that is easy to calibrate with an included automatic pH buffer recognition that can be set by you to 4, 7 or 10 pH.
Other useful functions that have been included as part of this test instrument include a low battery indicator and an automatic power off function so your battery life is conserved even when you have forgotten to switch it off.
Completing this pH meter is a built in electrode that does the measuring, a sensor cap to make it stays protected, a protection cap for the inner pH electrode and 4 LR44 button batteries.