Editorial Technical Reference

Flow Meter/Sensor

This page explains how Flow Meter/Sensor is classified within Chemical Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A device that measures and monitors the flow rate of chemicals within a dosing system.

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Flow Meter/Sensor in a manufacturing environment
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Product Specifications

Technical details and manufacturing context for Flow Meter/Sensor

Definition
This flow meter/sensor is a component used in chemical dosing systems to measure and monitor the flow rate of chemicals being dispensed. It provides real-time feedback to control systems, ensuring accurate dosing for processes such as water treatment, pharmaceutical production, or industrial manufacturing. The device operates by detecting flow through various methods, including electromagnetic induction, ultrasonic waves, turbine rotation, or differential pressure measurement. It converts the physical flow into an electrical signal (e.g., 4-20 mA, pulse, or digital output) transmitted to the system controller.

Key specifications include a nominal diameter of 15–50 mm (ISO 6708), a flow range of 0.1–10 m³/h with a turndown ratio of 10:1, and an accuracy of ±0.5% of rate (ISO 11631) for liquids with conductivity >5 µS/cm. Repeatability is ±0.1% of rate under constant operating conditions. Operating pressure ranges from 1.0 to 1.6 MPa. Operating temperature is -20 to 80 °C for PTFE-lined sensors. Ambient humidity is ≤95% RH (non-condensing). Ingress protection is IP65–IP67 (IEC 60529), with IP67 for submersible versions. Power supply is 24 V DC ±10% with reverse polarity protection. Output signal is 4–20 mA (IEC 60381-1), with HART protocol available. Electrical connection is M20×1.5 (IEC 60079-0) for 6–12 mm cable. Wetted materials include PTFE, PFA, and 316L (ASTM A240), resistant to most chemicals. Weight ranges from 2.5 to 8.0 kg depending on size and flange rating.

Materials on file include Stainless Steel 316L, PTFE, and Ceramic. These specifications are reference ranges; verify model-specific values and standards with the legal manufacturer or supplier before procurement or installation.
Working Principle
The flow meter/sensor operates by detecting flow through methods such as electromagnetic induction, ultrasonic waves, turbine rotation, or differential pressure measurement. It converts the physical flow into an electrical signal (e.g., 4-20 mA, pulse, or digital output) that is transmitted to the system controller. The sensor provides real-time feedback to ensure accurate chemical dosing.
Common Materials
Stainless Steel 316L, PTFE (Polytetrafluoroethylene), Ceramic
Technical Parameters
ParameterTypical rangeNotes & selection driver
Nominal Diameter15–50 mmSelect based on pipe size and flow range.ISO 6708
Flow Range0.1–10 m³/hTurndown ratio 10:1.
Accuracy±0.5 % of rateFor liquids with conductivity >5 µS/cm.ISO 11631
Repeatability±0.1 % of rateUnder constant operating conditions.
Operating Temperature-20–80 °CFor PTFE-lined sensors.
Ambient Humidity≤95 % RHNon-condensing.
Ingress ProtectionIP65–IP67IP67 for submersible versions.IEC 60529
Power Supply24 ±10% V DCReverse polarity protected.
Output Signal4–20 mAHART protocol available.IEC 60381-1
Electrical ConnectionM20×1.5Cable gland for 6–12 mm cable.IEC 60079-0
Wetted MaterialsPTFE, PFA, 316LResistant to most chemicals.ASTM A240
Weight2.5–8.0 kgDepends on size and flange rating.

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
  • Sensor Element
    Detects flow through physical interaction (e.g., turbine, ultrasonic transducer, magnetic field)
    Material: Stainless Steel or Ceramic
  • Signal Converter
    Converts physical measurement into standardized electrical signal
    Material: Electronic Components in Epoxy Housing
  • Housing/Body Part
    Protects internal components and provides connection to piping
    Material: Stainless Steel 316L
  • Seals/Gaskets Part
    Prevents leakage at connection points
    Material: PTFE or Viton

Application & selection

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 16 bar
flow rate: 0.1 to 100 L/min
temperature: -20°C to 80°C
slurry concentration: Up to 10% solids by weight
Media Compatibility
✓ Water-based solutions ✓ Acids (pH 2-10) ✓ Corrosion inhibitors
Unsuitable: Abrasive slurries with high solids content
Sizing Data Required
  • Required flow rate range (L/min)
  • Fluid viscosity (cP)
  • Pipe diameter (mm)

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Sensor Drift/Calibration Loss
Cause: Contamination of sensing elements (e.g., buildup, coating), electronic component aging, or environmental factors (temperature, humidity) affecting signal accuracy.
Mechanical Wear/Blockage
Cause: Abrasive particles in the fluid eroding internal components, or solid deposits obstructing flow paths and moving parts (e.g., impellers, pistons).
Maintenance Indicators
  • Erratic or inconsistent flow readings compared to system expectations (e.g., sudden drops/spikes without process changes)
  • Unusual audible noises (e.g., grinding, clicking) or visible leaks/condensation around the sensor housing
Engineering Tips
  • Implement regular calibration schedules based on process criticality and manufacturer guidelines, using traceable standards to maintain measurement integrity.
  • Install upstream filtration (e.g., strainers, filters) appropriate for the fluid type and particle size, and ensure proper piping alignment to minimize stress on the meter.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 4064-1:2014 (Water meters for cold potable water and hot water) ANSI/ASME MFC-3M (Measurement of Fluid Flow in Pipes Using Orifice, Nozzle, and Venturi) DIN EN 1434 (Heat meters)

Quoted from the published standard.

Manufacturing Precision
  • Bore diameter: +/-0.02mm
  • Flow rate accuracy: +/-0.5% of reading
Quality Inspection
  • Calibration test against traceable standards
  • Pressure test for leak integrity
Technical documentation
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Manufacturing capability
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Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
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Manufacturers of Flow Meter/Sensor

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Frequently Asked Questions

What is the operating principle of this flow meter/sensor?

It detects flow using methods like electromagnetic induction, ultrasonic waves, turbine rotation, or differential pressure. The physical flow is converted into an electrical signal (e.g., 4-20 mA) for the controller.

What are the key specifications to consider?

Nominal diameter 15-50 mm, flow range 0.1-10 m³/h, accuracy ±0.5% of rate, operating pressure 1.0-1.6 MPa, temperature -20 to 80 °C, and IP65-IP67 protection. Verify with manufacturer.

Which materials are used for wetted parts?

Wetted materials include PTFE, PFA, and 316L stainless steel, resistant to most chemicals. Also, materials on file include 316L, PTFE, and ceramic.

What output signals are available?

The standard output is 4-20 mA (IEC 60381-1), with HART protocol available. Other outputs like pulse or digital may be possible; confirm with supplier.

Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Related equipment

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Chemical Dosing System
View system integration details
Resin Storage and Delivery System
View system integration details

Industrial Ecosystem & Supply Chain Structure

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 12 October 2026

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