Editorial Technical Reference

Signal Amplifier

This page explains how Signal Amplifier 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 increases the amplitude of electrical signals from weighing sensors

Representative product image. Confirm appearance and specifications with the manufacturer.

Product Specifications

Technical details and manufacturing context for Signal Amplifier

Definition
A signal amplifier is a critical electronic component within weighing platforms that receives low-level electrical signals from load cells or strain gauges, amplifies them to usable levels, and transmits the enhanced signals to the weighing indicator or control system for accurate weight measurement and processing. This directory entry describes a generic signal amplifier intended for use in industrial weighing systems. It is designed to interface with bridge-type sensors such as load cells and strain gauges, which typically output signals in the millivolt range. The amplifier conditions these signals by applying precise gain, filtering out noise and interference, and providing a standardized output signal, commonly 4–20 mA, for transmission to a PLC, indicator, or other control equipment. Key parameters listed include a supply voltage of 24 V DC ±10% with reverse polarity protection, an input sensitivity adjustable via DIP switches from 0.5 to 3.0 mV/V, and an output signal of 4–20 mA (two-wire loop powered). The accuracy class is 0.05% FS per IEC 60770, covering nonlinearity and hysteresis. The operating temperature range is -20 to 60 °C, with storage from -40 to 85 °C (non-condensing). The housing is made of 304 stainless steel (ASTM A240) with an ingress protection rating of IP65 per IEC 60529, making it dust-tight and protected against water jets. The excitation voltage for bridge sensors is 5–12 V DC, and the load resistance is 0–500 Ω maximum at 24 V supply. An adjustable low-pass filter with a cutoff frequency range of 100–1000 Hz is provided. The weight ranges from 0.5 to 1.0 kg depending on enclosure size. All values are reference ranges and must be verified with the legal manufacturer or supplier for the specific model and application. This product is a component and does not include the weighing sensor or indicator.
Working Principle
The signal amplifier operates by receiving weak analog signals from weighing sensors (typically in millivolt range), applying precise gain through operational amplifier circuits, filtering out noise and interference, and outputting a clean, amplified signal suitable for analog-to-digital conversion and further processing by the weighing system's controller. The input stage is designed for bridge sensors, providing excitation voltage and reading the differential voltage. The gain is set via DIP switches to match the sensor's sensitivity. The output stage converts the amplified signal to a 4–20 mA current loop, which is less susceptible to electrical noise over long distances. The low-pass filter removes high-frequency noise, and the housing protects the electronics from environmental factors.
Common Materials
Printed Circuit Board, Semiconductor components, Copper traces
Technical Parameters
ParameterTypical rangeNotes & selection driver
Supply Voltage24 ±10% V DCReverse polarity protected
Input Sensitivity0.5–3.0 mV/VAdjustable via DIP switches
Output Signal4–20 mATwo-wire loop powered
Accuracy Class0.05 % FSIncludes nonlinearity and hysteresisIEC 60770
Operating Temperature-20–60 °CExtended range available
Storage Temperature-40–85 °CNon-condensing
Ingress ProtectionIP65Dust-tight and protected against water jetsIEC 60529
Excitation Voltage5–12 V DCFor bridge sensors
Load Resistance0–500 ΩMax at 24 V supply
Cutoff Frequency100–1000 HzAdjustable low-pass filter
Housing Material304 stainless steelCorrosion resistantASTM A240
Weight0.5–1.0 kgDepends on enclosure size

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
  • Operational Amplifier IC Part
    Primary amplification circuit that provides voltage gain
    Material: Semiconductor silicon
  • Input Filter Part
    Removes high-frequency noise from sensor signals
    Material: Ceramic capacitors, resistors
  • Power Supply Circuit Part
    Provides stable DC voltage to amplifier components
    Material: Voltage regulator IC, capacitors
  • Output Buffer Part
    Isolates amplifier from load and maintains signal integrity
    Material: Transistors, resistors
  • PCB Connector Part
    Electrical interface for sensor input and system output
    Material: Gold-plated copper
  • Bridge Excitation Supply
    Feeds the load cell bridge its stable excitation voltage; without it the sensor produces nothing to amplify.
  • Gain DIP Switches
    Sets the amplifier gain to match the particular sensor's sensitivity.

Applied To / Applications

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

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Not applicable (electronic component)
other spec: Input signal range: 0-10 mV, Output signal range: 0-10 V, Power supply: 12-24 VDC
temperature: -20°C to +60°C (operating), -40°C to +85°C (storage)
Media Compatibility
✓ Strain gauge load cells ✓ Piezoelectric sensors ✓ Resistive weighing sensors
Unsuitable: High-voltage environments (>100V AC)
Sizing Data Required
  • Input signal sensitivity (mV/V)
  • Required output signal range (V)
  • Power supply voltage (VDC)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Thermal degradation of semiconductor components
Cause: Inadequate heat dissipation due to dust accumulation on heatsinks, poor ventilation, or excessive ambient temperature leading to component overheating and performance drift or failure.
Signal distortion or intermittent output
Cause: Corrosion or loosening of electrical connectors and solder joints from vibration, thermal cycling, or moisture ingress, resulting in poor electrical contact and unstable signal transmission.
Maintenance Indicators
  • Audible high-pitched whine or buzzing from the amplifier housing, indicating potential transformer or capacitor failure
  • Visual observation of discoloration, bulging, or leaking from electrolytic capacitors on the circuit board
Engineering Tips
  • Implement regular preventive maintenance to clean heatsinks and ensure unobstructed airflow, and monitor operating temperature with thermal sensors to prevent thermal runaway
  • Use conformal coating on circuit boards in humid environments and apply thread-locking compounds to critical connectors to prevent vibration-induced loosening

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
CE Marking (EU Directive 2014/35/EU for Low Voltage Equipment) ANSI C63.4:2014 Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical and Electronic Equipment

Quoted from the published standard.

Manufacturing Precision
  • Gain Accuracy: +/-0.5 dB
  • Frequency Response Flatness: +/-0.2 dB over specified bandwidth
Quality Inspection
  • Signal-to-Noise Ratio (SNR) Measurement
  • Total Harmonic Distortion (THD) Analysis

Manufacturers of Signal Amplifier

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Shanghai Euchips Industrial Co., Ltd.
Shanghai, CN
Listed on the company's own website · profile compiled by CNFX from public sources

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

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Frequently Asked Questions

What is the typical input sensitivity range?

The input sensitivity is adjustable via DIP switches from 0.5 to 3.0 mV/V. This allows matching the amplifier to the specific load cell or strain gauge output. Always confirm the exact setting for your sensor.

What output signal does this amplifier provide?

It provides a 4–20 mA two-wire loop-powered output signal. This is a standard industrial analog signal that can be easily interfaced with PLCs and indicators. The load resistance must be within 0–500 Ω at 24 V supply.

What is the ingress protection rating?

The housing is rated IP65 per IEC 60529, meaning it is dust-tight and protected against water jets. This makes it suitable for many industrial environments, but installation specifics should be verified.

What standards apply to this product?

The accuracy class is per IEC 60770, and the ingress protection is per IEC 60529. The housing material is 304 stainless steel per ASTM A240. These standards are reference points; the legal manufacturer or supplier must confirm compliance for the specific model.

Data Basis

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

Preliminary Technical Classification
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