Editorial Technical Reference

Signal Converter / Transmitter

This page explains how Signal Converter / Transmitter is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

Electronic component that converts and transmits flow measurement signals from sanitary flow meters to control systems.

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Signal Converter / Transmitter in a manufacturing environment
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Product Specifications

Technical details and manufacturing context for Signal Converter / Transmitter

Definition
The Signal Converter / Transmitter is a critical electronic component used in sanitary flow meters. It receives raw measurement signals from flow sensors—typically magnetic, ultrasonic, or Coriolis elements—and converts them into standardized output signals such as 4-20 mA, 0-10 V, or digital protocols like HART or Profibus. These signals are then transmitted to monitoring or control systems for process automation in hygienic applications. The device amplifies and conditions low-level electrical signals, applies calibration and linearization algorithms, and converts them to industry-standard output formats. It maintains signal integrity and isolation, ensuring reliable data transmission. The converter is housed in a 316L stainless steel enclosure with PTFE/PFA seals and epoxy-encapsulated electronics, offering ingress protection rated IP65–IP67 (IEC 60529). It operates on a supply voltage of 12–36 V DC, with reverse polarity protection, and supports input and output signals of 4–20 mA with HART protocol. Accuracy is ±0.1% of span, and response time is ≤100 ms with adjustable damping. The device can handle process temperatures from -40 to 150 °C (sensor dependent) and an operating temperature range of -40 to 85 °C for electronics. Isolation voltage is 1500 V AC (input to output, per IEC 61010), and load resistance ranges from 0 to 600 Ω at 24 V supply. Weight varies from 1.2 to 2.5 kg depending on housing. All values are reference ranges; verify model-specific specifications with the legal manufacturer or supplier.
Working Principle
The Signal Converter / Transmitter receives low-level electrical signals from flow sensors, typically magnetic, ultrasonic, or Coriolis elements. It amplifies and conditions these signals, applies calibration and linearization algorithms, and converts them to standardized output formats such as 4-20 mA, 0-10 V, or digital protocols like HART/Profibus. The device transmits the converted signals via wired or wireless interfaces while maintaining signal integrity and isolation. It includes adjustable damping to filter noise and ensures accurate transmission to control systems.
Common Materials
316L Stainless Steel, PTFE/PFA Seals, Epoxy Encapsulated Electronics, Sapphire/Glass Windows
Technical Parameters
ParameterTypical rangeNotes & selection driver
Input Signal4–20 mAHART protocol supported
Output Signal4–20 mAHART protocol supported
Supply Voltage12–36 V DCReverse polarity protected
Accuracy±0.1 %of span
Operating Temperature-40–85 °CElectronics only
Process Temperature-40–150 °CSensor dependent
Ingress ProtectionIP65–IP67NEMA 4X equivalentIEC 60529
Housing Material316LStainless steelASTM A240
Weight1.2–2.5 kgDepending on housing
Response Time≤100 msAdjustable damping
Isolation Voltage1500 V ACInput to outputIEC 61010
Load Resistance0–600 ΩAt 24 V supply

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
  • Signal Conditioning Circuit
    Amplifies, filters, and linearizes raw sensor signals
    Material: PCB with surface-mount components
  • A/D Converter
    Converts analog signals to digital for processing
    Material: Integrated circuit chip
  • Microprocessor
    Executes calibration algorithms and signal processing
    Material: Microcontroller chip
  • Output Driver
    Generates standardized output signals
    Material: Power transistors and op-amps
  • Housing Part
    Protects electronics and provides sanitary mounting
    Material: 316L stainless steel
  • Electrical Connector Part
    Provides power and signal connections
    Material: Stainless steel with gold-plated contacts
  • Signal Isolation Stage
    Galvanically separates the sensor side from the output side so ground loops and spikes cannot corrupt the reading.

Application & selection

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 10 bar
flow rate: 0.1 to 100 m³/h
temperature: -40°C to +85°C
slurry concentration: Up to 15% solids by weight
Media Compatibility
✓ Pharmaceutical-grade liquids ✓ Food/beverage process fluids ✓ High-purity water systems
Unsuitable: Corrosive chemical slurries with abrasive particles
Sizing Data Required
  • Input signal type and range (e.g., 4-20mA, 0-10V, pulse)
  • Required output protocol (e.g., HART, Profibus, Foundation Fieldbus)
  • Power supply voltage and isolation requirements

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Signal drift or inaccuracy
Cause: Environmental contamination (moisture, dust, corrosive gases) affecting internal electronics or sensor components, leading to calibration loss or component degradation.
Complete signal loss or communication failure
Cause: Electrical issues such as power supply fluctuations, wiring faults (short circuits, loose connections), or component burnout due to overvoltage/overcurrent events.
Maintenance Indicators
  • Erratic or fluctuating output readings on the display or control system inconsistent with process conditions
  • Audible buzzing, humming, or clicking from the unit, or visible signs like overheating, discoloration, or moisture ingress
Engineering Tips
  • Implement regular calibration and environmental sealing checks to prevent contamination and ensure signal integrity, using manufacturer-recommended procedures and intervals.
  • Install surge protection devices and ensure stable, clean power supply to the unit, along with proper grounding and shielded cabling to minimize electrical interference.

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
IEC 61508: Functional safety of electrical/electronic/programmable electronic safety-related systems IEC 60529: Degrees of protection provided by enclosures (IP Code) EN 61326-1: Electrical equipment for measurement, control and laboratory use - EMC requirements

Quoted from the published standard.

Manufacturing Precision
  • Output accuracy: +/-0.1% of full scale
  • Temperature stability: +/-0.01% per °C
Quality Inspection
  • Loop calibration test: Verify 4-20mA output accuracy across input range
  • Environmental stress screening: Temperature cycling and vibration testing
Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

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Manufacturers of Signal Converter / Transmitter

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Frequently Asked Questions

What output signals does this signal converter support?

It supports standardized output signals such as 4-20 mA (with HART protocol) and 0-10 V, as well as digital protocols like HART or Profibus. The specific output options depend on the model; verify with the manufacturer.

What is the accuracy of this signal converter?

The accuracy is ±0.1% of span. This is a reference value; actual accuracy may vary with the specific model and application, so confirm with the supplier.

What are the environmental limits for operation?

The electronics can operate in temperatures from -40 to 85 °C, while the process temperature range is -40 to 150 °C (sensor dependent). The housing offers ingress protection IP65–IP67 (IEC 60529). Always verify these limits for your specific installation.

Is the signal converter isolated from the process?

Yes, it provides isolation voltage of 1500 V AC between input and output, per IEC 61010. This helps protect control systems from electrical interference. Confirm isolation ratings with the manufacturer for your application.

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:

Sanitary Flow Meter
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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