Editorial Technical Reference

Controller / Transmitter

This page explains how Controller / Transmitter 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

Electronic device that processes gas sensor signals and transmits data to monitoring systems

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Controller / Transmitter in a manufacturing environment
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Product Specifications

Technical details and manufacturing context for Controller / Transmitter

Definition
The Controller / Transmitter is a component used in gas detection systems within chemical manufacturing. It receives analog or digital signals from gas sensors, processes the data—including calibration, linearization, and alarm threshold comparison—and transmits standardized output signals to control panels, SCADA systems, or other monitoring interfaces. It serves as the interface between detection elements and system controls. The device is housed in a corrosion-resistant enclosure (316L stainless steel or ABS plastic) and is designed for industrial environments. It operates on a 24 V DC supply (24 ±10%, reverse polarity protected) with a maximum power consumption of 5 W. It accepts a 4–20 mA input signal (2-wire loop powered) and provides a 4–20 mA output signal, with HART protocol optional. Accuracy is ±0.5% FS (including linearity and hysteresis), and response time (T90) is ≤30 seconds. The electronics operate in temperatures from -40 to 85 °C, with storage temperature also -40 to 85 °C (non-condensing) and relative humidity 0–95% (non-condensing). Ingress protection is IP65–IP67 per IEC 60529, and the enclosure material is 316L per ASTM A240. Weight ranges from 1.2 to 2.5 kg depending on options, and approximate dimensions are 150×120×80 mm. The device includes a PCB, electronic components (ICs, resistors, capacitors), enclosure, and connectors (terminal blocks or plugs). It is important to verify model-specific values and standards with the legal manufacturer or supplier before procurement or installation.
Working Principle
The Controller / Transmitter receives electrical signals from gas sensors that are proportional to gas concentration. These signals are processed through amplification, filtering, and analog-to-digital conversion. Calibration algorithms are applied, and readings are compared to preset alarm thresholds. The device then outputs standardized signals (4–20 mA, 0–10 V, Modbus, HART, etc.) to monitoring equipment. This enables remote monitoring and alarm management in chemical plants.
Common Materials
PCB (Printed Circuit Board), Electronic components (ICs, resistors, capacitors), Enclosure (ABS plastic or stainless steel), Connectors (terminal blocks or plugs)
Technical Parameters
ParameterTypical rangeNotes & selection driver
Supply Voltage24 ±10% V DCReverse polarity protected
Power Consumption≤5 WMax at full load
Input Signal4–20 mA2-wire loop powered
Output Signal4–20 mAHART protocol optional
Accuracy±0.5 % FSIncludes linearity and hysteresis
Response Time≤30 sT90 for gas detection
Operating Temperature-40–85 °CElectronics only
Storage Temperature-40–85 °CNon-condensing
Relative Humidity0–95 % RHNon-condensing
Ingress ProtectionIP65–IP67Dust-tight, water-jet protectedIEC 60529
Enclosure Material316LCorrosion resistantASTM A240
Weight1.2–2.5 kgDepends on options
Dimensions150×120×80 mmL×W×H approximate

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 and filters raw sensor signals for accurate measurement
    Material: PCB with electronic components
  • Microcontroller/Processor
    Executes calibration algorithms, alarm logic, and communication protocols
    Material: Integrated circuit
  • Output Module
    Converts processed data to standardized output signals
    Material: PCB with output drivers
  • Display Interface Optional
    Optional local display for gas concentration readings and status
    Material: LCD/LED display with driver circuit
  • Enclosure
    Protects internal electronics from environmental conditions
    Material: ABS plastic or stainless steel

Application & selection

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 2 bar (gauge)
other spec: Flow Rate: 0-100 L/min, Slurry Concentration: <5% solids by weight
temperature: -20°C to +60°C
Media Compatibility
✓ Natural Gas ✓ Process Air ✓ Industrial Exhaust Streams
Unsuitable: High-concentration corrosive gases (e.g., chlorine, hydrogen sulfide above 100 ppm)
Sizing Data Required
  • Sensor Output Signal Type (e.g., 4-20mA, 0-10V)
  • Required Communication Protocol (e.g., Modbus, HART, 4-20mA loop)
  • Power Supply Voltage (e.g., 24VDC, 120VAC)

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Drift in calibration
Cause: Environmental factors (temperature fluctuations, humidity), sensor aging, or electronic component degradation affecting signal accuracy over time.
Signal loss or communication failure
Cause: Wiring issues (corrosion, loose connections, short circuits), power supply instability, or electronic component failure (e.g., damaged circuit boards).
Maintenance Indicators
  • Erratic or inconsistent readings on the control system display, indicating potential sensor or signal processing issues.
  • Audible alarms or warning lights from the controller/transmitter unit, signaling communication loss, power failure, or out-of-range conditions.
Engineering Tips
  • Implement regular calibration checks and environmental monitoring (e.g., temperature control) to maintain signal accuracy and prevent drift.
  • Use shielded cables, proper grounding, and secure connections to protect against electrical interference and physical damage to wiring.

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 CE Marking - EU Conformity for Safety, Health, and Environmental Protection

Quoted from the published standard.

Manufacturing Precision
  • Housing Dimensional Tolerance: +/-0.5mm
  • Electrical Connection Alignment: +/-0.2mm
Quality Inspection
  • Environmental Stress Screening (ESS) - Temperature and Vibration Testing
  • Functional Safety Verification - SIL (Safety Integrity Level) Compliance 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 Controller / Transmitter

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

HENGKO
Shenzhen, Guangdong, CN
Also makes: Temperature Probe, Humidity Sensor, Pressure Gauge and 5 more
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Gas Transmitter Assembly”
View source page ↗ hengko.com · recorded 2026-08-22
View profile Send enquiry
Beijing Zetron Technology Co., Ltd.
Beijing, CN
Also makes: HVAC Systems, Atmosphere Analyzer, Gas Detection System
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Gas Transmitters”
View source page ↗ zetroncn.com · recorded 2026-09-04
View profile Send enquiry

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Frequently Asked Questions

What is the supply voltage requirement?

The device requires a 24 V DC supply with a tolerance of ±10% and is reverse polarity protected. Always confirm the exact voltage range for your specific model.

What output signals are available?

The standard output is 4–20 mA, with HART protocol optional. Other outputs like 0–10 V or Modbus may be available depending on the model; check with the manufacturer.

What is the ingress protection rating?

The enclosure is rated IP65–IP67 per IEC 60529, meaning it is dust-tight and protected against water jets. Verify the exact rating for your model.

Can the device be used in hazardous areas?

This listing does not specify hazardous area certifications. If you need explosion-proof or intrinsically safe versions, consult the manufacturer for appropriate models and certifications.

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:

Gas Detection System
View system integration details

Industrial Ecosystem & Supply Chain Structure

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Controller / Transmitter.

Gas Transmitter Signal Transmitter Gas Controller

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 13 October 2026

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