Highly-accuracy explosion-proof liquid-level meter. Developed for underground light-oil tanks

Hiroki Kuwano, Shigeki Ogawa

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


This meter was developed by NTT to help ensure efficient and reliable maintenance of underground fuel tanks for standby engines. At 20 °C, it has a maximum error of 5 mm when the meter is 2 m from the liquid surface. By connecting the meter to a telephone circuit, the liquid level in a remote location tank can be continuously monitored. This facilitates the detection of leaks, which helps prevent disasters and preserve the environment. Meters have been installed on a trial base in the underground light-oil tanks at the Watari and Tekura Radio Repeater Stations of NTT's Tohoku Network Center; they have operated successfully for over two years as a part of the remote monitoring equipment.

Original languageEnglish
Pages (from-to)63-66
Number of pages4
JournalNTT Review
Issue number1
Publication statusPublished - 1995 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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