Function und Flexibility

The 4-piston meters are the classical sensors for accurate volume measurement. The fuel flowing through the sensor sets the piston into motion. This results in the rotation of the crankshaft, which is a measure of the volume flowing through the sensor element.

The sensing element is very robust, insensitive to shock/vibration and thus, if properly used very long-lasting.

Another advantage is the independence of the position in space and thus of gravity influences. Any movement of the sensor (any rotation and angle change) has no effect on the quality and functionality.

Herewith the flowtronic sensor provides flexibility in a variety of applications and can be mounted - in contrast to other measurement techniques - completely independent of position.

This makes the flowtronic systems suitable not only for test bench applications, but also ideal for automotive use.

Measuring Range

The measuring range of the sensor plays an increasingly important role.

A minimum flow rate at engine idle rpm needs same precision in measurement as peak consumption at full engine load. The sensor must therefore have a measuring range of 0.1 to well over 100 l/h, and depending on engine size it needs even a significantly higher measuring range.

Additionally the direction of flow can be detected by the flowtronic sensor.

The measuring range of flowtronic sensors is +/- 0.1 ... 250l/h. This makes the sensor suitable for a variety of applications and covers engines of two-wheel vehicles up to very large commercial and specialized vehicles.


The sensor resolution is critical to quality and accuracy.

It represents the smallest volume that can be reliably detected by the sensor. Dynamic changes in fuel consumption are the better detected, the smaller the resolution of the sensor will be.

The resolution of the latest flowtronic sensors is at 0.004 ml (In comparison, the resolution of the former flowtronic sensors was approximately 0.333ml.)

The flowtronic sensor offers the perfection, namely 0.004ml resolution over a measuring range of 0.1 ... 250 l/h, while recognizing the direction of flow.