HM Digital Pen style pH/Temp meter

PH-80: pH HydroTester Series

The PH-80 pH meter has established itself as the most reliable option in its price category.It is currently widely used in many different kinds of applications, such hydroponics and gardening, pools and spas, aquarium and reef tanks, water ionizers, and drinking water.

Features 
Measures both temperature and pH levels.
Digital calibration with one-touch automation.
Water-resistant design.
Displays temperature readings simultaneously.
Large, easy-to-read LCD screen.
Features include automatic temperature correction (ATC), an auto-off function, data-hold functionality, and a dying battery indicator.
Pre-calibrated at the factory to 7.0 pH.
Comes with a translucent cover, batteries, storage solution, and pH 7.0 buffer powder.

Specifications
pH range: 0-14.
Temperature range from 1-55 °C (32-130 °F)
Resolution: 0.1 pH; temperature resolution: 0.1 °C/F.
precision: +/- 0.2 pH; temperature precision is +/-2%.
Calibration: Digital automated calibration (one point).
Minimum EC/TDS is 10 µS/5 ppm.
Glass sensor with reference tube electrodes.
Power supply: 3 x 1.5V buttons cell batteries (type LR44 or comparable, supplied).
Dimensions: 15.3 x 3.2 x 1.8 cm (6.0 x 1.3 x 0.7 in).
Weight: 53.9 grams (1.9 oz)