Reference Flow Sensor for Electromagnetic Flow Meter Calibration

Product Specifications

Technical details and manufacturing context for Reference Flow Sensor

Definition

The Reference Flow Sensor is the core measurement component within an Industrial Electromagnetic Flow Meter Calibrator. It provides the known, highly accurate flow rate against which the flow meter under test is compared and calibrated. It ensures the traceability and reliability of the calibration process. This sensor is designed for use in calibration systems where precise flow measurement is critical. It operates on a primary measurement principle, such as positive displacement, turbine, or Coriolis, to generate a highly accurate and stable flow signal. This signal is compared to the output of the electromagnetic flow meter being calibrated to determine its measurement error and adjustment needs. The sensor is available in nominal diameters from DN15 to DN300 (ISO 6708), with a flow range of 0.1 to 1000 m³/h. It offers an accuracy of ±0.1% of rate (ISO 11631) and repeatability of ±0.05%. Operating temperature ranges from -40°C to 85°C, and operating pressure from 1.0 to 1.6 MPa. The power supply is 24 V DC ±10%, and the output signal is 4-20 mA (IEC 60381-1). The enclosure rating is IP65 to IP68 (IEC 60529). Wetted parts are made of stainless steel 316L (ASTM A240), with precision bearings and electronic sensor elements. Weight ranges from 5 to 50 kg depending on size and material. All listed parameters are reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier. The sensor is a component intended for integration into a calibrator system; it is not a standalone product. Proper selection requires consideration of flow range, pipe size, and process conditions. The sensor's performance is critical for calibration consistency, and it must be operated within its specified limits to maintain accuracy. Regular maintenance and verification are recommended to ensure long-term reliability. For detailed specifications and installation guidelines, consult the manufacturer's documentation.

Working Principle

The Reference Flow Sensor operates based on a primary measurement principle, such as positive displacement, turbine, or Coriolis, to generate a highly accurate and stable flow signal. This signal is compared to the output of the electromagnetic flow meter being calibrated to determine its measurement error and adjustment needs. The sensor's design ensures traceability and reliability in the calibration process, providing a known reference flow rate against which the meter under test is calibrated.

Common Materials

Stainless Steel (wetted parts), Precision Bearings, Electronic Sensor Elements

Technical Parameters

Parameter	Typical range	Notes & selection driver
Nominal Diameter	DN15–DN300 mm	Select based on flow range and pipe size.ISO 6708
Flow Range	0.1–1000 m³/h	Ensure sensor operates within linear range.
Accuracy	±0.1 % of rate	Calibration standard requires high accuracy.ISO 11631
Repeatability	±0.05 %	Critical for calibration consistency.
Operating Temperature	-40–85 °C	Exceeding limits may affect accuracy.
Power Supply	24 ±10% V DC	Must be stable for accurate signal processing.
Output Signal	4–20 mA	Analog output for calibration systems.IEC 60381-1
Enclosure Rating	IP65–IP68	Protects against dust and water ingress.IEC 60529
Material	316L	Corrosion-resistant for process media.ASTM A240
Weight	5–50 kg	Depends on size and material.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Flow Body / Metering Section Part
Forms the precise flow path where the fluid passes for measurement.

Material: Stainless Steel
Rotor / Moving Element Part
The part displaced or rotated by the fluid flow, its movement is proportional to flow rate.

Material: Stainless Steel or Special Alloy
Pickup / Sensor Head
Detects the movement of the rotor (e.g., via magnetic, optical, or inductive means) and converts it into an electrical signal.

Material: Encapsulated Electronics, Sensing Coils/Magnets
Bearing Assembly
Supports the rotor with minimal friction to ensure accurate and repeatable movement.

Material: Ceramic or Specialized Bearing Steel

Manufacturers of Reference Flow Sensor

Manufacturer profiles associated with Reference Flow Sensor.

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Frequently Asked Questions

What is the purpose of the Reference Flow Sensor?

It serves as the calibration standard within an electromagnetic flow meter calibrator, providing a known, highly accurate flow rate against which the flow meter under test is compared and calibrated.

What are the key specifications to consider?

Key specifications include nominal diameter (DN15-DN300), flow range (0.1-1000 m³/h), accuracy (±0.1% of rate), repeatability (±0.05%), operating temperature (-40 to 85°C), and operating pressure (1.0-1.6 MPa). Always verify these with the manufacturer for your specific model.

What standards are referenced?

The sensor references ISO 6708 for nominal diameter, ISO 11631 for accuracy, IEC 60381-1 for output signal, IEC 60529 for enclosure rating, and ASTM A240 for material. These are procurement references, not certifications.

How should I select the right sensor?

Selection should be based on the required flow range, pipe size, and process conditions. Ensure the sensor operates within its linear range and that all parameters are verified with the legal manufacturer or supplier for your specific application.

Data Basis

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pressure:	0 to 16 bar
flow rate:	0.1 to 10 m/s
temperature:	-40°C to +85°C
slurry concentration:	Up to 20% solids by volume

Reference Flow Sensor

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