Automatic temperature compensation: According to the Nernst equation, when the probe is inserted into the water from the air, there be errors in the measured data due to the temperature change, automatic temperature compensation automatically calibrates the errors and maintains the accuracy of the data. Automatic temperature compensation range: 0.1℃-60℃, 32℉-140℉. Multi-functional detachable probe: High- probe with high- algorithm chip ensures more accurate and faster response of the tester. The detachable probe design is convenient to carry and store, easy to replace. Multi-functional design: Combining PH/EC/TDS and temperature measurement functions. Immersed the electrode of the tester in water and waited for a few seconds to get the data on the LCD screen. One machine is multi-purpose, more economical and environmentally friendly. Lock button: After the value is stable, click the hold button to lock the current value. If you need to re-measure, please press the hold button again. Automatic power-off function & large screen display: PH tester has a backlight LCD that helps you clearly see the measurement in any case. The automatic power-off function turns off the power after 135 seconds without any operation to save power. Employs a fully transparent liquid crystal (LCD) to display 4-digit values and the corresponding physical quantity units., Weight: 0.33840957217 Pounds, Manufacturer: Aisuoka