BURKERT 575531 (Type 8140) is a compact radar level transmitter configured for continuous liquid and bulk solids level measurement across distances from 0.00 m up to 30.00 m with 1 mm accuracy. The unit combines a PVDF sensor body and integrated antenna with an external NPT 1 1/2 process thread and FKM medium-contacting seals, rated for process pressures up to 3 bar.

Operating on a 12 to 35 V DC supply, the device delivers a standard 4–20 mA current loop output equipped with HART communication. Configuration can be performed locally through an integrated display module or wirelessly via Bluetooth interface.

Technical Specifications

Parameter	Specification
Burkert Type	8140
Order Code (SKU)	575531
Measurement Principle	Non-contact radar
Measuring Range	0.00 to 30.00 m
Measuring Accuracy	1 mm
Measurement Mode	Continuous measurement
Process Connection	External thread NPT 1 1/2
Connection Material Category	Plastics (PVDF)
Antenna Construction	Thread with integrated antenna (PVDF)
Wetted Seal Material	FKM (Fluor rubber)
Housing / Cover Seal	EPDM
Operating Voltage	12.0 V to 35.0 V DC
Analog Output	4–20 mA (current output HART)
Digital Communication	HART + Bluetooth
Electrical Connection	1x M20 cable gland (Polyamide, NBR seal), clamp terminals
Permissible Medium Pressure	Max. 3 bar
Medium Temperature	-40 °C to +80 °C
Ambient Temperature	-40 °C to +80 °C
Enclosure Rating	IP66 / IP67
Explosion Protection	ATEX / IECEx: II 1/2 G Ex ia IIC T6...T1 Ga/Gb

Process Connection and Sensor Construction

BURKERT 575531 utilizes a compact device architecture with a wetted PVDF threaded body and integrated antenna. The NPT 1 1/2 external thread allows direct installation onto vessel nozzles or threaded tank connections without requiring separate horn extensions.

Process sealing is maintained by an FKM elastomeric seal for medium-contacting components, while housing covers and enclosure interfaces are sealed with EPDM. Wetted elements withstand process temperatures between -40 °C and +80 °C under operating pressures up to 3 bar.

Electrical Integration and Communication

The transmitter operates as a loop-powered device across an input voltage range of 12 V to 35 V DC. Process values are transmitted via an active 4–20 mA current output supporting the highway addressable remote transducer (HART) digital protocol.

Parametrisation and Commissioning

Field setup is supported through two complementary methods:

• Local configuration using the built-in display module and clamp-terminal interface.
• Wireless parameterization using integrated Bluetooth communication without opening the transmitter housing in service environments.

Wiring enters through a single M20 polyamide cable gland fitted with an NBR seal and terminates at internal clamp terminals. Cable plugs are not included in delivery.

Operating Limits and Hazardous Area Approvals

BURKERT 575531 provides dual IP66 and IP67 ingress protection against heavy water spray and temporary submersion.

Hazardous Area Certifications

The instrument carries intrinsic safety approvals under both ATEX and IECEx standards for Zone 0 and Zone 1 gas atmospheres:

• ATEX: II 1/2 G Ex ia IIC T6...T1 Ga/Gb
• IECEx: A463 Ex ia IIC T6...T1 Ga/Gb

Ambient and process media temperatures must remain within the certified range of -40 °C to +80 °C.