Overview of Fuel Flow Meter and related instruments

Configuration of CE-Conforming models


FZ series Mass Flow Detectors

The FZ series flow detectors use the principle of the Coriolis force. They are capable of high-accuracy, continuous measurement of mass flow. The FZ-2000 series Mass Flow Detectors are used in combination with the FM series Flow Meters.

FZ-2000 series Mass Flow Detectors


FZ-2100 Standard flow rate type


FZ-2200 High flow rate type


Mass Flow Rate Detection System


LPG Mass Flow Rate Detection System


FZ-2000 series Mass Flow Detectors


FM-2500A Flow Meter


FM-1500 Flow Meter


System Configurations

Flow Meter Peripheral Devices


MF-113 Pressure Increase & Reduction Unit


MF-015 Automatic Air Purging Tank


The FZ series use the measurement principle of Coriolis force which is generated when the movement of a mass and rotation occur simultaneously.



The fluid that entered from the inlet passes through the tube and goes out through the outlet. With this flow meter the application of its inherent vibration to the tube causes a movement equivalent to the angular velocity, thereby generating a Coriolis force. As shown in the figures above, since the tube for which the Coriolis force is being generated generates a twist proportional tothe mass flow rate, the mass flow rate is calculated from the amount of this twist.


FP series Volumetric Flow Detector

FP series Volumetric Flow Detectors can measure volumetric flow rate of gasoline, light oil, kerosene, standard petroleum oils, methanol, ethanol or gasohol in combination with the digital flow meter.




Four pistons are arranged radially in the flow detection unit, and move back and forth repeatedly according to the flow of fluid from the inlet to the outlet. The pistons are rotated by the crankshaft, and their movement is transmitted to the magnetic-coupled rotation detection unit. The rotary encoder mounted on the rotation detection unit generates pulse signals in accordance with the amount of piston movement, and they are calculated and displayed to obtain instantaneous flow rate/total flow rate in calculation/display section. The pulse signals generated by two pair of light-projecting/receiving elements with 90-degree phase difference are judged its rotating direction to perform accurate flow rate measurement without being affected by back-flow or pulsation.


MF series On-Board Flow Detector

The MF series are on-board flow detectors incorporated the FP-2140H at detecting section. They can measure fuel flow rate in combination with the FM series or the DF series. The MF-2200 is for gasoline engines, the MF-3200 is for diesel engines.

FX series Gravity Flow Detector

High-accurate and high-functional gravity flow detector with no need to consider the density variations caused by temperature. Liquid flow rate can be obtained of gasoline, light oil, kerosene, methanol*, ethanol* or gasohol* in combination with the digital display units. (*: option)



If the fluid level falls below L3, the pressure signal generated by the detector causes the solenoid valve V1 to open and more fluid to flow in. When the fluid level reaches L2, valve V1 closes. Measurement of the flow rate starts after the specified time for the surface of the fluid to reach the fixed level has elapsed. As the fluid level falls from L2 as it is being consumed the output from the differential pressure transducer changes in accordance with the gravity of the consumed fluid, and the gravity flow rate is obtained from this change amount.

--Flow rate measurement --

  1. Total flow rate from start time to stop time in manual measurement mode.

  2. Up to the specified total flow rate from start time.

  3. Total flow rate from start time to specified time.

 Alarms are generated if the fluid reaches the L1 overflow level or falls to the L4 insufficient fluid level.




Copyright © ONO SOKKI CO.,LTD All Rights Reserved. | Terms of use