HFS 2100 Electromechanical Flow Switches ATEX Intrinsically safe

The HYDAC HFS 2100 flow switch in ATEX version has been specially developed for use in potentially explosive atmospheres. Like the standard version it is based on the variable area float principle, and can be mounted in any position.

The test medium moves a spring-loaded float in the direction of flow, depending on the flow rate. A fully encapsulated reed contact is fitted to the outside of the instrument and is therefore separate from the flow circuit. When the magnet inside the float reaches the preset position, the reed contact switches.

Intended areas of application are, for example, the oil and gas industry, on gas turbines or in locations with high levels of dust contamination, e.g. in mills.

Protection types and applications:

II 2G Ex mb II T6 / T5
II 2D Ex tD A21 IP67 T80 °C / T100 °C

Special features:

• Accuracy ≤ ± 10 % FS
• Viscosity compensation from 30 .. 600 cSt
• Any mounting position
• High level of functional reliability
• High level of switching accuracy
• Stepless switch point setting by user
• High pressure resistance
• Threaded connection
• Certificate: PTB 03 ATEX 2159 X PTB 03 ATEX N056-3

Notes on installation:

• The medium must not contain solid particles! We recommend using contamination strainers.
• External magnetic fields can affect the switching contact. Ensure sufficient distance from magnetic fields (e.g. from electric motors)!

Safety instructions:

• The circuits must not incorporate any effective inductance or capacitance.
• The maximum ratings stipulated in the technical data must never be exceeded, not even for a short time.
• To protect the switching contact, a fuse for the circuit must be provided outside the hazardous area, unless the switching unit is connected to an intrinsically safe circuit.
• Unless the device is connected to an intrinsic safe circuit, special safety precautions have to be implemented.
• The device may be used in hazardous areas designated as category 2.
• The device must not be used in areas where there is a possibility that an electrostatic charge can be caused in the plastic housing.
• The device must not be used in machinery, systems or medical apparatus where, in the event of a malfunction, persons, animals or equipment could be harmed or damaged.