Ecaree PT00000200 Gardening Set: 1 Digital PH Meter & 1 TDS Water Temperature Purity Salinity PPM Pen, Home Improvement

The PH pen provides more reliable accuracy and durability for testing the acidity or alkalinity of liquids. It is very easy to use - just immerse the electrode and the readings are automatically displayed.
With an error resolution of 0.01 PH to 0.05 PH range, you may get higher accuracy than other PH meters. The electrode is designed with more durability in order to offer a longer product lifetime even for frequent use.
With a standard measuring range of 0 -14 PH, it is an affordable equipment to test your swimming pool, aquarium, tap water, and appliance water source, and you can finally know whether the water you are drinking or using is acceptable for the application.
It is also an excellent choice for basic measurements in a laboratory setting, making it an ideal choice for students to take chemistry or biology classes.

The TDS meter (aka ppm pen, nutrient tester, tds stick) is an inexpensive and convenient digital tool and you can check your overall water quality instantly with it. TDS (Total Dissolved Solids) means any salt, metal or mineral in the water.
With the push of a button, the TDS-EZ can tell you overall water purity level, which will be displayed on the screen in ppm (parts per million). The lower the TDS level, the purer the water, and 0 ppm is pure H2O.
The TDS-EZ is great for checking your tap water quality, or knowing when to change a filter. (The meter does not test for biological contaminants.)
The TDS-EZ is a great tool to test drinking water, water filtration and purification, hydroponics (test your nutrients), aquariums, RO/DI systems, pools and spas, and more.

Specifications:
Measuring range: 0.00-14.00 PH
Resolution: 0.01 PH
Accuracy: ± 0.05 PH
Display: LCD Backlight
Batteries: 3x 1.5 V LR44 button cells
Automatic temperature compensation: 0 - 50°C (32 - 122°F)
Dimensions: 5.95x1.30x0.8 inch