Check the listing for details. HM Digital PH-80S PH/Temperature Meter. Condition: New. Listed at 46.95 USD. The PH-80 is an economically priced, reliable pH meter that is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more.FEATURESMeasures pH and temperatureOne-touch automatic digital calibrationWater resistantSimultaneous temperature displaySleek, lightweight designLarge LCD displayAutomatic Temperature Compensation (ATC)Auto-off function, data-hold function and low-battery indicatorIncludes storage solution in a sponge embedded in a translucent capFactory Calibrated: The PH-80 meter is factory calibration to pH 7.0. The meter can easily and quickly be recalibrated with digital calibration to pH 4.0, 7.0 or 10.0 using the meter's simple one-touch processIncludes a cap, batteries, storage solution and pH 7.0 buffer