Electronic hydrometer

• US 4,129,824 A
• Filed: 11/22/1976
• Issued: 12/12/1978
• Est. Priority Date: 11/22/1976
• Status: Expired due to Term

• Current Assignee: Edward P. Howes
• Original Assignee: Edward P. Howes
• Inventors: Howes, Edward P.
• Primary Examiner(s): Tokar, M.
• Application Number:
  US05/743,861
• Time in Patent Office: 750 Days
• Field of Search: 73/32 R, 324/61 R, 324/30 B, 324/29.5, 324/29, 324/30 R, 320/48
• US Class Current: 324/432
• CPC Class Codes: G01N 27/06 of a liquid involving electrolysis G01N27/26
• CPC Class Codes: G01R 27/02 Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant by measuring phase angle only G01R25/00
• CPC Class Codes: H01M 10/484 for measuring electrolyte level, electrolyte density or electrolyte conductivity
• CPC Class Codes: H01M 50/569 Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals battery terminal connectors with integrated measuring arrangements G01R31/364
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

An electronic hydrometer for monitoring the specific gravity of a solution containing ions includes a probe having spaced apart electrodes adapted to be inserted into the solution to be monitored and is provided with an A.C. resistance electrically connected in series with an electrode of the probe to form, with the probe, a voltage divider network. Means for applying an A.C. voltage across the network and means for generating a reference voltage are provided. The voltage across one element of the voltage divider network is compared with the reference voltage, the difference in voltages being an indication of solution specific gravity. Suitable means, such as a meter, is provided for comparing the voltages and indicating the voltage difference.

Claims