Definitions for "PH METER"
a specialized voltmeter which has two fundamental requirements
a specially designed voltmeter, which can be used to measure the electrical potential difference between very high resistance voltaic cells, under conditions of essentially, zero current flow in the measuring circuit
a specific type of voltmeter which has a very high impedance of the input channels
a boxy-looking instrument attached to a glass or plastic tube called a probe
a common example of an ion-selective electrode
an electronic device that measures small voltages
Keywords:  thermometer, minimum, maximum
a must, and a minimum/maximum thermometer
a chemical sensor because it monitors changes in the acidity of a liquid, which is a chemical change
Keywords:  health, good, investment
a very good investment for health