8081 BURKERT | Alldatasheet
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Visit product website DATA SHEET Type 8032 Flowmeter/Threshold detector with paddle wheel Type 8611 eCONTROL - Universal controller Type 8802 ELEMENT continuous control valve systems - overview Type 8619 multiCELL - Multi-channel and multi-function transmitter/controller Standard | EU | en | 2024-02-19 | 09 Flowmeter for the continuous measurement of water
- Ultrasonic flowmeter using transit time method
- Dynamic range ≥ 1:250
- Low pressure drop
- No flow-settling section necessary in the inlet or outlet The ultrasonic flowmeter Type 8081 is designed for the flow measurement of water which may also be slightly contaminated. The device consists of a brass fitting with an integrated measuring tube and a transmitter. It is available in 5 variants: QN 0.6 DN 15, QN 1.5 DN 15, QN 2.5 DN 20, QN 3.5 DN 25, QN 6.0 DN 25 with flow rate ranges of 0.06 to 20 l/min (nominal flow (nominal flow rate 3.5 m3/h i.e. 58 l/min) and from 1 to 200 l/min (nominal flow rate 6.0 m3/h i.e. 100 l/min) respectively. Each variant has either a pulse output or a pulse output and a 4…20 mA current output. The electrical connection is made via a 5-pin M12 male connector. Combined with a controller and a control valve, the device can be used to set up a control loop. Product variants described in the data sheet may differ from the product presentation and description. Type description Can be combined with Type 8081 © Christian Bürkert GmbH & Co. KG, Subject to alteration
2 | 8Visit product website Table of contents 1. General technical data 3 2. Approvals and conformities 4 3. Materials 5 4. Dimensions 5 5. Performance specifications 6 6. Product installation 6 7. Product operation 7 8. Ordering information 7
3 | 8Visit product website 1. General technical data Note: If the device is mounted in a humid environment or outside, then the maximum voltage allowed is 35 V DC instead of 36 V DC. Product properties Material Make sure the device materials are compatible with the fluid you are using. Further information can be found in chapter “3.1. Bürkert resistApp” on page 5. Further information on the materials can be found in chapter “3.2. Material specifications” on page 5. Non wetted parts Cover PA Housing PPS Screw Stainless steel Fixed connector Silicone Wetted parts Fitting body Brass Measuring tube PES Seal EPDM Pipe diameter DN 15…DN 25 Dimensions Further information can be found in chapter “4. Dimensions” on page 5. Measuring element 2 ultrasound emitter-receiver cells Measuring range 0.06…200 l/min Performance data Measurement deviation Flowrate: ≤ (0.01 % of full scale + 2 % of measuring value) 1.) Further information can be found in chapter “5.1. Measurement deviation diagram” on page 6. Repeatability ≤ 1 % Electrical data Operating voltage (V+) 12…36 V DC Current consumption • Own consumption: < 4 mA
- Consumption with load: < 1 A Output The device is available with a pulse output or with a pulse output and a 4…20 mA analogue outputs
- Device with a pulse (transistor) output: – Pulse (transistor): NPN (as default setting) or PNP (on request), open collector NPN-output: 0.2…36 V DC, max. 700 mA, min. 5 mA Galvanic insulation and protected against overvoltage, polarity reversals and short circuit
- Device with a pulse (transistor) and a 4…20 mA analogue outputs: – Pulse (transistor): PNP (as default setting) or NPN (on request), open collector PNP-output: operating voltage (V+), max. 700 mA Galvanic insulation and protected against overvoltage, polarity reversals and short circuit – Current: 4…20 mA (sourcing mode and PNP transistor as default setting, sinking mode and NPN transistor on request) Loop impedance max.: 1100 Ω at 36 V DC, 610 Ω at 24 V DC, 100 Ω at 12 V DC Scaling • Pulse (transistor): – Variants QN 0.6 or QN 1.5 : 1 pulse corresponds to a volume = 0.002 l (K factor = 500 pulse/litre) – Variants QN 2.5 or QN 3.5 : 1 pulse corresponds to a volume = 0.005 l (K factor = 200 pulse/litre) – Variant QN 6 : 1 pulse corresponds to a volume = 0.01 l (K factor = 100 pulse/litre)
- Current: 4 mA correspond to 0 l/min and 20 mA correspond to Qmax. of flow range (by default) Voltage supply cable 1.5 mm2 max. cross-section
4 | 8Visit product website Medium data Fluid temperature + 5…+ 90 °C (+ 41…+ 194 °F) Fluid pressure PN 16 (232.16 PSI) Process/Pipe connection & communication Pipe connection G or NPT external thread; ¾", 1" or 1"¼ Electrical connection 5-pin M12 male connector for 5-pin M12 female connector (not provided) Approvals and conformities Directives CE directive Further information on the CE Directive can be found in chapter “2.2. Standards” on page 4. Pressure equipment directive Complying with article 4, paragraph 1 of 2014/68/EU directive Further information on the pressure equipment directive can be found in chapter “2.3. Pressure Equipment Directive (PED)” on page 4. Others On request:
- Calibration certificate
- Test report 2.2 Environment and installation Ambient temperature Operating and storage: + 5…+ 55 °C (+ 41…+ 131 °F) Relative air humidity ≤ 80 %, without condensation Height above sea level Max. 2000 m Degree of protection according to IEC/EN 60529 IP65 with M12 cable plug plugged-in and tightened 1.) Under reference conditions i.e. measuring medium = water, ambient and water temperature = + 20 °C (+ 68 °F) 2. Approvals and conformities 2.1. Conformity In accordance with the Declaration of Conformity, the product is compliant with the EU Directives. 2.2. Standards The applied standards which are used to demonstrate compliance with the EU Directives are listed in the EU-Type Examination Certificate and/or the EU Declaration of Conformity. 2.3. 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: Device used on a pipe Note:
- The data in the table is independent of the chemical compatibility of the material and the fluid.
- PS = maximum admissible pressure (in bar), DN = nominal diameter of the pipe 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
5 | 8Visit product website 3. Materials 3.1. Bürkert resistApp Bürkert resistApp – Chemical resistance chart You want to ensure the reliability and durability of the materials in your individual application case? Verify your combination of media and materials on our website or in our resistApp. Start chemical resistance check 3.2. Material specifications No. Element Material
1 Screws Stainless steel
2 Cover PPS
3 M12 male connector PA
4 Seal Silicone
5 Housing PPS
6 Fitting and measuring tube (inside fitting) Brass and PES
7 Seal EPDM
- Dimensions Note: Dimensions in mm, unless otherwise stated I HH1 ∅ D H2I1 DN H H1 H2 L1 L2 L3 Ø D I I1
6 | 8Visit product website 5. Performance specifications 5.1. Measurement deviation diagram -10 0,1 1 10 100 1000 max. DN25 max. DN20 Flow rate in l/min Max. measurement deviation in % max. DN15 6. Product installation 6.1. Installation notes Flow measurement Note:
- The device is not suitable for use in gaseous media and steam.
- Minimum straight upstream and downstream distances are not necessary. The correct direction of fluid flow in the pipe is indicated with an arrow, engraved on the underside of the fitting. The flowmeter can be installed into either horizontal or vertical pipes. When horizontally mounted, the max. fluid temperature is 90 °C. The max. fluid temperature must be reduced to 80 °C when the electronic (black enclosure) is turned upwards. When vertically mounted the max. fluid temperature is also 80 °C. Correct Incorrect Correct Incorrect
7 | 8Visit product website The Type 8081 works correctly when the pipe is full and free of any air bubbles near the flowmeter. In presence of bubbles in the pipe, the left installation no.1 should be avoided. 1 2 3 4 If the absence of any air bubbles cannot be guaranteed, the device should be fitted on a horizontal pipe, with the electronic enclosure facing down. This way, the bubbles will not interfere with the propagation of ultrasound waves. It is equally advisable to place stop valves before and after the flowmeter, in order to facilitate the assembly and disassembly of the latter. 7. Product operation 7.1. Measuring principle The Type 8081 ultrasonic flowmeter is based on the transit time method. The sound transit time from emitter 1 to receiver 2 will be measured and compared with the transit time from emitter 2 to receiver 1. The difference in transit time is directly proportional to the flow speed of the fluid. 1 2 Emitter-receiver Emitter-receiver Flow direction of the fluid Ultrasound wave 1 Ultrasound wave 2 t0 t1 t2 The electronic module delivers a pulse signal proportional to the volume or an industry standard 4…20 mA signal, proportional to the flow rate. 8. Ordering information 8.1. Bürkert eShop Bürkert eShop – Easy ordering and quick delivery You want to find your desired Bürkert product or spare part quickly and order directly? Our online shop is available for you 24/7. Sign up and enjoy all the benefits. Order online now
8 | 8Visit product website 8.2. Bürkert product filter Bürkert product filter – Get quickly to the right product You want to select products comfortably based on your technical requirements? Use the Bürkert product filter and find suitable articles for your application quickly and easily. Try out our product filter 8.3. Ordering chart Variant DN Measuring range Pipe connection Output Article no. QN 0.6 15 0.06…20 l/min External thread G ¾" Pulse, NPN 560131 Pulse, PNP + 4…20 mA as source 560113 External thread NPT ¾" Pulse, NPN 560612 Pulse, PNP + 4…20 mA as source 560617 QN 1.5 15 0.1…50 l/min External thread G ¾" Pulse, NPN 559865 Pulse, PNP + 4…20 mA as source 559868 External thread NPT ¾" Pulse, NPN 560613 Pulse, PNP + 4…20 mA as source 560618 QN 2.5 20 0.16…82 l/min External thread G 1" Pulse, NPN 559866 Pulse, PNP + 4…20 mA as source 559869 External thread NPT 1" Pulse, NPN 560614 Pulse, PNP + 4…20 mA as source 560619 QN 3.5 25 0.6…116 l/min External thread G 1¼" Pulse, NPN 559867 Pulse, PNP + 4…20 mA as source 559870 External thread NPT 1¼" Pulse, NPN 560615 Pulse, PNP + 4…20 mA as source 560620 QN 6.0 25 1…200 l/min External thread G 1¼" Pulse, NPN 560132 Pulse, PNP + 4…20 mA as source 560114 External thread NPT 1¼" Pulse, NPN 560616 Pulse, PNP + 4…20 mA as source 560621 8.4. Ordering chart accessories Description Article no. M12 female connector with plastic threaded clamping ring, 5-pin, straight, to be wired 917116 M12 female connector with moulded cable (shielded), 5-pin, straight, cable length: 2 m 438680