Voltcraft pht 02 atc ph meter voltcraft pht 02 atc the voltcraft pht 02 atc ph meter stick is intended for measurement of ph levels from 0 to 14ph of dead idle non flammable or non corrosive liquids with automatic temperature compensation atc the pht 02 atc is a handy measuring device for quick and simple testing of ph in aquariums swimming pools nurseries the device is water resistant to ip57 the product is powered by two cr2032 batteries voltcraft pht 02 atc ph meter