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Peer reviewed Peer reviewed
ERIC Number: EJ307430
Record Type: CIJE
Publication Date: 1984
Pages: N/A
Abstractor: N/A
Reference Count: 0
ISBN: N/A
ISSN: N/A
An Inexpensive, Very High Impedance Digital Voltmeter for Selective Electrodes.
Caceci, Marco S.
Journal of Chemical Education, v61 n10 p935 Oct 1984
Describes a compact, digital voltmeter which exceeds, both in accuracy and input impedance, most commercial pH meters and potentiometers. The instrument consists of two parts: a very high impedance hybrid operational amplifier used as a voltage follower (ICH8500/A, Intersil) and a four and one-half digits LED display panel meter (RP-4500, Texmate). (JN)
Descriptors: Chemistry, College Science, Electric Circuits, Higher Education, Measurement Equipment, pH, Science Education, Science Equipment
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: Teachers; Practitioners
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers: Voltmeters