Burkert 783717 (Type 8031) is a compact low-flow sensor with a paddle wheel and Hall sensor, specially designed for use in aggressive and solid-free liquids. The particular cost-attractive measuring principle is based on a local flow velocity measurement. The sensor produces a flow-proportional frequency signal which can easily be transmitted and processed.

Features

• Cost attractive solution for low-flow rates and solid-free liquids
• Wetted parts made of ECTFE, sapphire, coated stainless steel, FKM or EPDM for use in aggressive liquids
• 3-wire system with paddle wheel and Hall sensor up to 80 °C, 10 bar
• Frequency output proportional to the flow rate, PLC-compatible

TIP

We recommend here particularly the connection to the Bürkert Universal transmitter Type 8025.

General Technical Data

Property	Value
Wetted parts
Axis	Coated stainless steel or sapphire
Bearing	POM or Rubin
Paddle wheel	POM or ECTFE
Magnet	ECTFE encapsuled or blank
Sensor housing	POM or ECTFE
Seal	FKM, EPDM or FFKM
Performance data
Measuring principle	Paddle wheel
Measuring range	10...100 l/h (2.6...27 gph) / 20...250 l/h (5.3...66 gph)
Standard K factor	10200 pulse/litre (range 10...100 l/h) / 3400 pulse/litre (range 20...250 l/h)
Measurement deviation	±2% of full scale
Repeatability	±0.8% of full scale
Electrical data
Operating voltage	5...24 V DC
Current consumption	Max. 11 mA at 24 V DC
Output	Push-pull (complementary output) between V+ and signal or between GND and signal. Frequency: 0...300 Hz
Medium data
Fluid temperature	0...80 °C (+32...+176 °F)
Fluid pressure	Max. 10 bar (145 PSI) at 20 °C (68 °F)
Viscosity	1...10 cSt.
Product connections
Pipe connection	G 1/4", Tube spigot 8/6 mm, Tube spigot 9 mm
Electrical connection	Cable, 1 m length (3 × 0.14 LiYY)
Environment and installation
Ambient temperature	Operation: 0...+80 °C (+32...+176 °F) / Storage: -10...+80 °C (+14...+176 °F)
Degree of protection	IP65

Approvals and Conformities

Pressure Equipment Directive (PED) The device conforms to article 4, paragraph 1 of the Pressure Equipment Directive (PED) 2014/68/EU under the following conditions:

Type of fluid	Conditions
Fluid group 1, Article 4, Paragraph 1.c.i	DN ≤ 25
Fluid group 2, Article 4, Paragraph 1.c.i	DN ≤ 32 or PS*DN ≤ 1000
Fluid group 1, Article 4, Paragraph 1.c.ii	DN ≤ 25 or PS*DN ≤ 2000
Fluid group 2, Article 4, Paragraph 1.c.ii	DN ≤ 200 or PS ≤ 10 or PS*DN ≤ 5000

Dimensions

Paddle wheel sensor with G 1/4" pipe connection

Paddle wheel sensor with 8/6 mm tube spigot pipe connection

Paddle wheel sensor with 9 mm tube spigot pipe connection

Performance Specifications

Pressure Loss Diagram

Flow Characteristic

Ordering Chart

Measuring range	Pipe connection	Output	Housing, paddle wheel	Axis	Seal	Article no.
Without mounting plate
10...100 l/h	Tube spigot 8/6 mm	Frequency push-pull	POM	Coated stainless steel	FKM	783717
10...100 l/h	G 1/4"	Frequency push-pull	POM	Coated stainless steel	FKM	783719
20...250 l/h	Tube spigot 9 mm	Frequency push-pull	POM	Coated stainless steel	FKM	783718
20...250 l/h	G 1/4"	Frequency push-pull	POM	Coated stainless steel	FKM	783720
With mounting plate
10...100 l/h	G 1/4"	Frequency push-pull	ECTFE	Sapphire	FKM	783721
10...100 l/h	G 1/4"	Frequency push-pull	ECTFE	Sapphire	EPDM	783722
10...100 l/h	G 1/4"	Frequency push-pull	ECTFE	Sapphire	FFKM	783723
10...100 l/h	G 1/4"	Frequency push-pull	ECTFE	Coated stainless steel	FKM	437982
10...100 l/h	G 1/4"	Frequency push-pull	ECTFE	Coated stainless steel	EPDM	438531
20...250 l/h	G 1/4"	Frequency push-pull	ECTFE	Sapphire	FKM	783724
20...250 l/h	G 1/4"	Frequency push-pull	ECTFE	Sapphire	EPDM	783725
20...250 l/h	G 1/4"	Frequency push-pull	ECTFE	Sapphire	FFKM	783726
20...250 l/h	G 1/4"	Frequency push-pull	ECTFE	Coated stainless steel	FKM	438532
20...250 l/h	G 1/4"	Frequency push-pull	ECTFE	Coated stainless steel	EPDM	437524