温湿度トランスミッタ
for Humidity Test Chambers
Precision Monitoring Solution for Environmental Test Equipment and Constant temperature and humidity chamber
Why Temperature and Humidity Transmitters Are Essential for Humidity Test Chambers
Ensuring Precision and Stability in Every Climate Simulation
In humidity test chambers, maintaining stable and accurate environmental conditions is critical for reliable testing outcomes. Temperature and humidity transmitters play a central role by providing precise, real-time monitoring and feedback control. Here’s why they are indispensable:
Ensure Accurate Environmental Control
Continuously measure and transmit real-time temperature and humidity data to maintain tight control over test conditions.Improve Test Reliability and Reproducibility
Help ensure that every test is conducted under consistent conditions, reducing variability and increasing data reliability.Enable Automated Feedback Systems
Work with the chamber’s control system to automatically adjust heating, cooling, humidification, or dehumidification processes.Support Compliance with Testing Standards
Provide the accuracy and traceability required to meet ISO, ASTM, or industry-specific testing protocols.Protect Sensitive Products and Materials
Prevent exposure to unintended environmental deviations, especially important for electronics, pharmaceuticals, and composites.Facilitate Data Logging and Quality Audits
Allow seamless integration with data acquisition systems for recording, traceability, and documentation.
Technical Requirements for Temperature and Humidity Transmitters in Climate Chambers
✅ 1. Accuracy and Stability (Core Indicators)
| Requirement Item | 説明 |
| 温度精度 | Typically ±0.1℃ to ±0.2℃; higher precision for pharmaceutical testing |
| 湿度精度 | At least ±1.5%RH; high-end tests require ±1.0%RH or even ±0.8%RH |
| 長期的な安定性 | One year or longer with minimal drift, reducing recalibration |
| 応答時間 | Humidity response time ≤10 seconds for fast system feedback |
| Drift Control | Annual drift ≤1.0%RH to ensure test consistency |
✅ 2. High-Humidity Operating Capability
| Requirement Item | 説明 |
| High-Humidity Endurance | Reliable under 90–95%RH or near-saturation for extended periods |
| Anti-Condensation Design | Coating or heater on sensor surface to prevent condensation |
| 耐食性 | Resistant materials required for pharma, chemical, and defense chambers |
✅ 3. Mechanical Design & Installation
| Requirement Item | 説明 |
| Compact/Custom Design | Small form factor or OEM dimension options for tight space |
| Installation Method | Supports wall-mount, embedded, threaded, flanged, or snap-in installation |
| Sealing Performance | High-sealing at probe interface to maintain chamber air tightness |
| Replaceable Probe | Quick-plug for easy maintenance or replacement without full teardown |
✅ 4. Output & System Compatibility
| Requirement Item | 説明 |
| Output Type | Supports 4–20mA, 0–10V, RS485 Modbus RTU and other industrial standards |
| Anti-Interference Design | Shielded signal cables to ensure stable transmission |
| Calibration Support | Multi-point or field calibration supported for long-term precision |
Why HENGKO's Temperature and Humidity Transmitters are Your Best Choice in Climate Chambers
HG808-H Vs HG808-C Pro Feature Comparison
| What We Can Do for You | HG808-H: Solution | HG808-C Pro: Solution |
| 1. Failure in 高湿度 environments | Designed for 40–95%RH; supports long-term operation in high humidity. Anti-condensation and anti-mold design with high protection rating to avoid moisture ingress. | Also supports stable high humidity operation. Optimized internal structure with strong anti-drift capability. |
| 2. Inadequate humidity accuracy affects control | Provides ±2%RH accuracy, suitable for general high-humidity control requirements. | ±0.8%RH ultra-high accuracy, ideal for pharmaceutical stability testing and precise electronics testing. |
| 3. Difficult probe installation | Supports various probe forms: direct insertion, extended hose, flange mount. OEM customization for embedded use. | Offers compact probe version for tight or sealed chamber installations. |
| 4. Signal compatibility issues | Supports analog (4–20mA / 0–5V / 0–10V) + Modbus RTU / RS485; compatible with PLC, environmental monitoring, and industrial control systems. | Same support with dual output, adaptable to different systems. |
| 5. Complex maintenance, long cycle | Industrial-grade housing: dust-proof, corrosion-resistant, long maintenance-free period. Probe can be calibrated or replaced. | Minimal accuracy drift, supports multi-point calibration, reduces maintenance cost. |
| 6. Cost control and delivery issues | Uses domestic components. 40–60% cost savings compared to Rotronic/Vaisala. Fast OEM delivery. | Also cost-effective and suitable as a high-precision domestic alternative. |
HG808 Series - Application Matching
| Application Positioning | Product | Recommended Use Scenarios |
| High-Humidity Specialized Model (Cost-Effective) | HG808-H | High-humidity fermentation chambers, food steam cabinets, constant temperature and humidity chambers, environmental aging chambers |
| High-Precision Humidity Control (Imported Alternative) | HG808-CPro | Pharmaceutical stability test chambers, electronic temperature & humidity reliability test chambers, high-precision inspection chambers |
ダクト湿度温度センサー
HENGKOは、ステンレス製の温度・湿度センサプローブから露点発信器まで、あらゆるニーズに対応する幅広い温度・湿度センサを提供しています。HENGKOのセンサーは、正確で信頼性が高く、耐久性に優れているため、さまざまな用途に最適です。
4.1 露点 RS485 - ダクト一体型プローブシリーズ
HENGKOは、ステンレス製の温度・湿度センサプローブから露点発信器まで、あらゆるニーズに対応する幅広い温度・湿度センサを提供しています。HENGKOのセンサーは、正確で信頼性が高く、耐久性に優れているため、さまざまな用途に最適です。
HG808-H
- ハイ・ウェット / 高湿度条件 98% RH湿度トランスミッタ
高湿度環境、クリーンルーム、スイミングプールでの常時運転用に設計されています。 - 連続高湿度環境 >85%RH、正確で長寿命の動作
What Process of Constant temperature and humidity chamber need to Monitor Temperature and Humidity ?
Monitoring temperature and humidity is essential at multiple stages of the operation of a constant temperature and humidity chamber (climate chamber) to ensure accurate simulation of environmental conditions and compliance with testing standards. The key processes that require real-time temperature and humidity monitoring include:
1. Environmental Conditioning / Pre-Stabilization
Purpose: To bring the chamber environment to the target temperature and humidity setpoint before introducing test samples.
Monitoring Role: Sensors verify that the chamber has reached the desired stable condition (e.g., 25°C ±0.2°C / 60%RH ±2%RH) before testing begins.
2. Sample Testing / Soak Period
Purpose: To expose materials, products, or components to precise and stable environmental conditions over a defined duration.
Monitoring Role: Continuous feedback from temperature and humidity transmitters allows the control system to make fine adjustments. This ensures uniformity and prevents deviations that could invalidate test results.
3. Data Logging and Validation
Purpose: To record environmental data for quality assurance, regulatory compliance (e.g., FDA, ICH, ISO), and traceability.
Monitoring Role: Transmitters provide high-resolution, time-stamped data to the chamber’s data logger or external system to verify environmental conditions throughout the test duration.
4. Closed-Loop Control Operation
Purpose: To automatically regulate heating, cooling, humidification, and dehumidification systems.
Monitoring Role: Real-time data from the sensors is used by the PID control algorithm to maintain tight environmental tolerances, responding to internal or external fluctuations.
5. Alarm & Fault Detection
Purpose: To detect deviations or failures (e.g., heater/humidifier malfunctions or door leaks).
Monitoring Role: The transmitter triggers alarms when temperature or humidity values fall outside of acceptable limits, helping prevent damage to test samples and ensuring system reliability.
6. Calibration and Maintenance Feedback
Purpose: To maintain sensor performance over time and ensure test validity.
Monitoring Role: Monitoring trends in sensor drift or inconsistency helps schedule timely recalibration and reduce unplanned downtime.
5-Factors You Should Care When Choose Humidity Transmitter for Your Constant temperature and humidity chamber ?
Here are 5 factors you should consider when buy a humidity transmitter for your Climate Chambers:
1. High Accuracy & Stability
Look for ±1.0%RH or better and ≤1%RH/year drift to ensure reliable test data.
2. High-Humidity Resistance
Must operate long-term in 90–95%RH. Anti-condensation coating and corrosion-resistant housing are essential.
3. Fast Response Time
Response ≤10s helps maintain tight control via closed-loop feedback systems.
4. Signal Compatibility
Supports 4–20mA, 0–10V, or RS485 Modbus to fit your control and monitoring systems.
5. Easy Installation & Maintenance
Compact probes, replaceable elements, and field calibration save time and reduce downtime.
よくあるご質問
What is the role of a temperature and humidity transmitter in a humidity test chamber?
A temperature and humidity transmitter is a critical component in humidity test chambers, responsible for accurately monitoring and transmitting real-time environmental data. It helps maintain the desired climate conditions by feeding precise temperature and humidity readings to the chamber’s control system. This ensures consistency, repeatability, and compliance with testing standards, especially in industries like pharmaceuticals, electronics, and materials testing.
How accurate should a humidity transmitter be for stability and reliability testing?
For high-reliability applications such as pharmaceutical stability testing or electronic component reliability, humidity transmitters should offer an accuracy of ±1.0%RH or better, with premium models achieving ±0.8%RH. Temperature accuracy should typically be within ±0.1°C to ±0.2°C. The sensor must also demonstrate low drift over time (≤1.0%RH/year) and fast response times (≤10 seconds) to meet strict control requirements.
What are the common failure risks of humidity transmitters in high-humidity environments?
Common failure risks include:
Condensation buildup on the sensor element, causing reading errors or corrosion.
Microbial growth due to prolonged exposure to high moisture.
Signal drift or loss of calibration over time.
Ingress of water vapor damaging internal electronics.
To mitigate these risks, industrial-grade transmitters are designed with anti-condensation coatings, sealed housings, sensor heatersそして corrosion-resistant materials (e.g., 316L stainless steel or PBT enclosures).
Can I use standard HVAC humidity transmitters in a climate chamber?
No, standard HVAC humidity transmitters are typically not suitable for the rigorous and high-humidity operating conditions of climate or test chambers. They often lack the necessary:
Measurement accuracy
Environmental sealing
Condensation protection
長期安定性
Industrial or laboratory-grade transmitters are specifically designed to operate in 90–95%RH, with strong resistance to drift, corrosion, and electrical interference, making them essential for reliable test chamber operation.
What output signals are best for integrating with test chamber control systems?
The most commonly used output signals include:
Analog outputs: 4–20mA or 0–10V, suitable for direct connection with PLCs or analog controllers.
Digital outputs: RS485 with Modbus RTU protocol, allowing for long-distance, multi-point data collection and integration with modern data logging systems.
A dual-output model (e.g., analog + Modbus) is often preferred for flexible integration and redundancy.
How often should a temperature and humidity transmitter be calibrated in a humidity test chamber?
Calibration frequency depends on the application, sensor stability, and regulatory requirements. In general:
High-precision applications (e.g., pharmaceutical stability chambers): calibrate every 6–12 months.
General industrial use: annual calibration may suffice if the sensor is stable.
Choose transmitters with low drift specifications, multi-point calibration supportそして field calibration options to minimize downtime and ensure traceability.
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HENGKOは、産業用センサーソリューションのグローバルリーダーであり、ユニークなデザインと優れた性能に定評があります。当社の温度・湿度トランスミッターとセンサーは、食品・飲料、製薬、製造、環境モニタリングなど、幅広い産業分野で使用されています。
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