Editorial Technical Reference

Humidity Control Module

This page explains how Humidity Control Module 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

A specialized component within an Environmental Control System that regulates and maintains specific humidity levels in a controlled environment.

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Humidity Control Module in a manufacturing environment
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Product Specifications

Technical details and manufacturing context for Humidity Control Module

Definition
The Humidity Control Module is an integral part of an Environmental Control System designed to precisely monitor, adjust, and stabilize the moisture content in the air of a defined space. It works in conjunction with other system components (like temperature controllers and air handlers) to create and maintain optimal environmental conditions required for specific industrial processes, product storage, or operational safety. The module is typically housed in a corrosion-resistant stainless steel enclosure (grade 316L per ASTM A240) with a polycarbonate sensor cover, and it contains electronic components such as a PCB, humidity sensor, and relays. It operates within a humidity control range of 20–90 % RH with a control accuracy of ±3 % RH at steady state. The response time to reach 90% of setpoint is ≤10 seconds. It requires a 24 V DC supply voltage (reverse polarity protected, ±10%) and consumes ≤5 W at nominal voltage. The operating temperature range is -10 to 60 °C, and the operating pressure range is 1.0–1.6 MPa. The ingress protection rating is IP54–IP65 depending on enclosure option (per IEC 60529). The weight ranges from 1.2 to 1.8 kg depending on configuration. These parameters are directory reference ranges and must be confirmed for the specific model and application with the legal manufacturer or supplier. The module is a component, not a standalone system, and its performance is influenced by the overall system design and installation conditions.
Working Principle
The module typically operates by using a humidity sensor to measure the current relative humidity (RH) in the environment. This data is processed by a controller. If the RH deviates from the setpoint, the controller activates an actuator. To increase humidity, it may trigger a humidifier (e.g., ultrasonic, steam). To decrease humidity, it may activate a dehumidifier (e.g., refrigerant-based, desiccant) or coordinate with the system's ventilation to introduce drier air. It continuously cycles to maintain the target humidity range.
Common Materials
Stainless Steel (housing), Polycarbonate (sensor cover), Electronic Components (PCB, sensors, relays)
Technical Parameters
ParameterTypical rangeNotes & selection driver
Humidity Control Range20–90 % RHOperating range for stable control
Control Accuracy±3 % RHAt steady state
Response Time≤10 sTo reach 90% of setpoint
Supply Voltage24 ±10% V DCReverse polarity protected
Power Consumption≤5 WAt nominal voltage
Operating Temperature-10–60 °CAmbient temperature
Operating Pressure1.0–1.6 MPa
Ingress ProtectionIP54–IP65Depends on enclosure optionIEC 60529
Material316LCorrosion-resistant stainless steelASTM A240
Weight1.2–1.8 kgDepending on configuration

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
  • Humidity Sensor
    Measures the current relative humidity in the environment and sends the signal to the controller.
    Material: Polymer/ceramic sensing element
  • Microcontroller/PLC Interface
    Processes sensor input, compares it to the setpoint, and executes the control logic to activate humidification or dehumidification outputs.
    Material: Silicon (integrated circuits)
  • Relay Output Board
    Provides switched electrical connections to control external devices like humidifier solenoids, dehumidifier compressors, or damper actuators.
    Material: FR4 PCB, copper traces, electromechanical relays

Application & selection

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 1.5 bar (absolute), 0 to 0.5 bar (differential)
flow rate: 10 to 500 m³/h (air), 0.1 to 5 L/min (water)
temperature: 0°C to 50°C (operating), -20°C to 70°C (storage)
humidity range: 10% to 90% RH (controlled), 0% to 100% RH (sensing)
Media Compatibility
✓ Clean dry air (compressed air systems) ✓ Nitrogen (inert gas environments) ✓ Deionized water (humidification systems)
Unsuitable: Corrosive chemical vapors (e.g., chlorine, ammonia, acidic atmospheres)
Sizing Data Required
  • Required humidity setpoint and tolerance (±%)
  • Maximum air/water flow rate (m³/h or L/min)
  • Ambient temperature range and thermal load (kW)

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Corrosion and scaling
Cause: Exposure to high humidity, water impurities, and chemical residues leading to material degradation and deposit buildup on critical surfaces.
Sensor drift and calibration loss
Cause: Continuous exposure to moisture, temperature fluctuations, and contamination causing inaccurate humidity readings and control failures.
Maintenance Indicators
  • Inconsistent humidity readings or control fluctuations beyond ±5% of setpoint
  • Visible condensation, water droplets, or mineral deposits on internal components
Engineering Tips
  • Implement regular preventive maintenance including sensor calibration, filter replacement, and surface cleaning using appropriate non-corrosive agents
  • Install proper filtration and water treatment systems to minimize impurities and maintain optimal operating conditions

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 8573-1:2010 (Compressed air purity classes) ANSI/ASHRAE 55-2020 (Thermal environmental conditions for human occupancy) DIN EN 14511 (Air conditioners, liquid chilling packages and heat pumps)

Quoted from the published standard.

Manufacturing Precision
  • Humidity sensor accuracy: +/-2% RH
  • Control valve actuation repeatability: +/-0.5%
Quality Inspection
  • Leak test (pressure decay method)
  • Calibration verification against NIST-traceable hygrometer
Technical documentation
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Manufacturing capability
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Inspection readiness
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Supplier transparency
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Manufacturers of Humidity Control Module

Manufacturer profiles associated with Humidity Control Module.

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Frequently Asked Questions

What is the operating humidity range of the Humidity Control Module?

The directory lists a humidity control range of 20–90 % RH. This is a reference range; the exact range for a specific model must be confirmed with the manufacturer.

What supply voltage does the module require?

The module requires a 24 V DC supply voltage with a tolerance of ±10%, and it is reverse polarity protected. Always verify the voltage requirements for the specific model.

What is the ingress protection rating?

The ingress protection rating is IP54–IP65 depending on the enclosure option, per IEC 60529. Confirm the rating for the chosen configuration.

Is the module certified to any standards?

The directory lists standards such as IEC 60529 for ingress protection, but these are reference standards for verification. The module's compliance must be confirmed with the manufacturer.

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:

Environmental Control 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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