A new radiofrequency titrimeter

Abstract

A radiofrequency titrimeter operating on the beat-frequency principle has been designed and constructed. The meter is of the pulse-counter type and is supplemented in its rôle of beat-frequency detector by two other facilities: an audio amplifier with loudspeaker and a miniature cathode-ray indicator. These devices assist the operator in adjustment of beat frequency and act as a check on stability when preparing to commence a titration.

The operational frequency is variable and has a span of 0·5 to 30 MHz, covered continuously in six overlapping ranges. Beat frequencies up to 1 MHz can be measured on nine sensitivity scales, the lowest of which measures 100 Hz.

Design includes provision for the implementation of automatic recording.

Examples are given of the use of the instrument as a monitor for acid-base, precipitation and complexometric titrations.