Intuitive operation via rotary controls pH, temperature and mV mode for redox The 3505 is a simple to use laboratory pH, mV and temperature meter for use in general purpose and educational applications. It Calibration controls locked during utilises rotary controls for mode selection and pH calibration. A novel design feature ensures that inadvertent movement of the Manual or automatic temperature calibration controls has no effect during sample measurement. The large display ensures that during demonstrations and when Large display used by groups, all can easily see the clear LCD readout. Battery or mains operated Technical Specification pH Range Temperature Range or optional 9V power supply Ordering Information Part Code 3505 pH meter supplied with epoxy combination pH electrode (924 001), electrode stand and shorting plug, buffer sachets and battery Optional mains power supply