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HFT 250 / HFT 2500
Edition: 2020-11-03
HYDAC ELECTRONIC GMBH
Part No.: 669886
E
1 General
The HFT 250 and 2500 flow rate transmitter series is characterised for its reliability in
function and for its easy handling. In order to benefit fully from all the features of this
equipment, please observe the following:
Any person involved in the installation, commissioning or operation of this equipment
must have read and understood the user manual and in particular the safety
instructions.
The HFT 250 and 2500 series of HYDAC flow transmitters is based on the variable area float
principle and is position-independent.
Irrespective of the installation position, the test fluid deflects a spring-loaded float in the
direction of flow, depending on the flow rate.
A Hall sensor is fitted to the outside of the device and is therefore also outside the flow
circuit. In proportion to the deflection of the float, the sensor produces an analogue signal
which corresponds to the particular measuring range.
The device is calibrated for vertical installation and for an upwards flow direction. Since the
weight of the float has an effect on the measurement result, variations could occur for other
installation positions.
Due to their special angled design (Y design) the HFT 250 instruments are not directly
exposed to the volume flow. This device is particularly suited for the use in water-based
cooling lubricants.
