It discussed the application for the magnetostrictive level meter about the tanks of the service station supervisory metering system.

This paper introduces an isolated measuring technique with the external level meter.

After analyzingof the traditional floater level meter,a newmethod to improve the traditional floater levˉel meter is introduced in this paper,a electrocircuit schematic is also given.

Application of radar level gauge in the monitoring of Huangdao underground oil tank;

Designation of the Standard Testing System for Automatic Level Gauge;

The using status of the γ-ray level gauge in urea synthetic tower are introduced.

Operation principle of GY-IB type fibre-optic liquid level gauge is explained, test results by workers and technicians of the Metrological Test Institute are introduced and some defects and applied prospects of the gauge are analyzed.

The principle of reflective moving grating optical-fiber displacement sensor and the method for eliminating signal drift of system by use of compensating circuit are deseribed,and on this basis,an optical-fiber liquid level gauge for C6H6 storage tank is designed.

A Floater Liquidometer Using Hall Effect;

The new-type 2023A liquidometer is put into operation in Binzhou pumping station.

A design approach of an ultrasonic liquidometer by DS18B20 temperature sensor is introduced.

Research on Liquid Level Detector with High Sensitivity and Precision for Oil Tank Level;

A new intelligent instrument of liquid level detector taking advantage of the lead screw compounded with micro differential pressure transformer, based on AT90S8535 can enhance the precision of the level detector.

The conventional level indicators used in oil storage tanks, indicating the level with the measurant (crude oil) directly flowing into the indicator, are unreliable or even inoperative because it is subject to the adhesion of the viscous oil.