Burkert 556360 (Type 8012) is a continuous flowmeter equipped with a magnetic paddle wheel, designed for cost-effective integration into pipe systems without requiring additional pipelines. This specific model features a G1 connection, a PVDF paddle wheel, and supports flow rates from 689 to 22,963 l/h. It provides both a 4...20 mA analogue output and a transistor output, making it highly versatile for various industrial flow measurement applications involving neutral or mildly aggressive, particle-free liquids.

The Type 8012 family consists of a fitting (Type S012) and an electronic module (Type SE12) that are screwed together. Bürkert’s proprietary fitting system ensures simple installation into all pipelines from DN 06 to DN 65. The outputs are configurable via a USB port using a PC, allowing for customized frequency proportional to the volume flow rate or switching output modes.

Product Design and Assembly

The device Type 8012 is made up of a fitting Type S012 and a transmitter Type SE12 equipped with a paddle wheel sensor. The sensor detects the rotation of the paddle-wheel and generates a signal in which the frequency is proportional to the rotation frequency.

1: Paddle-wheel | 2: SE12 | 3: S012 | 4: Location of the LEDs

The electronic module is fitted with 2 LEDs visible by transparency on the side of the housing:

• A green LED is on when the device is energized and flashes proportionally to the rotation frequency of the paddle-wheel.
• A red LED signals a malfunction of the flowmeter.

Technical Data

Material Specifications

Make sure the device materials are compatible with the fluid you are using.

No.	Element	Material
1	Screws	Stainless steel A4
2	Housing	PPS
3	Seal	EPDM
4	M12 male connector or cable gland	PA
5	Axis and bearing	Ceramics ($Al_2O_3$)
6	Paddle wheel and holder	PVDF
7	Seal	FKM (EPDM as option)
8	Fitting body	Brass, stainless steel 1.4404/316L, PVC or PP
9	Cable	PVC

Performance and Fluid Data

Property	Value
Measuring range	Flow rate: 0.5...1000 l/min (0.13...265 gpm) Flow velocity: 0.3...10 m/s
Measurement deviation	Teach-in: ± 1% of the measured value Standard K factor: ± 2.5% of the measured value
Linearity	± 0.5% of full scale
Repeatability	± 0.4% of the measured value
Viscosity	Max. 300 cSt (300 cP)
Rate of solid particles	Max. 1% (Maximum particle size: 0.5 mm)

WARNING

Take the fluid pressure / temperature dependency into account according to the nature of the material of the fitting used.

1: PVC | 2: PP | 3: Metal

Electrical Data

Property	Value
Operating voltage	12...36 V DC ± 10%, filtered and regulated
Current consumption	<60 mA (at 12 V DC for current variant, without load)
Output	Transistor: NPN (default) or PNP, open collector, 700 mA max. Current: 4...20 mA (3 wire), sinking (default), loop impedance max.: 1125 Ω at 36 V DC
DC reverse polarity protection	Yes
Overvoltage protection	Yes

Installation

Selection of the Nominal Diameter

The following graph is used to determine the appropriate DN of the pipe and fitting for the application, according to the fluid velocity and the flow rate. On the chart, the intersection of flow velocity and flow rate gives the appropriate diameter.

Installation Notes

INFO

The device is not suitable for use in gaseous media and steam.

Minimum straight distances upstream and downstream of the sensor must be observed. These stabilizing distances depend on the pipe’s design. Increasing these distances or installing a flow conditioner may be necessary to obtain the best accuracy (refer to EN ISO 5167-1).

The device can be installed in either horizontal or vertical pipes, but the following additional conditions must be respected:

• The device has to be installed so that the paddle wheel axis is horizontal.
• The pipe always has to be filled with fluid at all times near the device.
• The pipe design must be such that no air bubbles or cavitation can form within the medium near the device at any time.

The paddle-wheel axis must be horizontal (Left: Correct, Right: Not correct)

Ensure the pipe is always filled and prevent air bubbles (Left: Correct, Right: Not correct)

Electrical Wiring

DANGER

Danger due to electrical voltage. Shut down and isolate the electrical power source before carrying out work on the system. Observe all applicable accident protection and safety regulations for electrical equipment.

Make sure the installation is equipotential. Connect the negative power supply terminal to the earth to eradicate the effects of common mode currents. If this connection cannot be made directly, a 100 nF / 50 V capacitor can be fitted between the negative power supply terminal and the earth.

Pin Assignment (M12 Fixed Connector)

1: Version with pulse output | 2: Version with pulse and current output

Pin	Colour of the wire (accessory cable)
1	brown
2	white
3	blue
4	black
5	grey

Troubleshooting

Problems signalled by the LEDs:

Status red LED	Status green LED	Status current output	Possible cause	Recommended action
Flashes 3 times every second	Off	22 mA	Full scale exceeded (flow rate in the pipe is too high)	Check the process parameters
On	Off	22 mA	Memory problem	Switch the power supply off then on. If the error persists, contact your Bürkert retailer.
Off	Flashes twice every second	22 mA	The device with optical detection is mounted in the wrong direction	Mount the device, ensuring that the arrow on the side of the housing indicates the direction of the fluid.

Problems not signalled by the LEDs:

Problem	Recommended action
The device does not function	Check the wiring. Check that the device is energized.
The pulse output does not work	Check whether the wiring is suitable for the output type, NPN or PNP.
The current output does not work	Check whether the wiring is suitable for the output type, source or sink.
The flow rate measurement is incorrect	Recalculate and change the setting of the K factor.