How to select the correct Dwyer humidity sensor for cold storage, pharmaceutical plants and laboratories.

In environments that require strict microclimate control, such as cold food storage, pharmaceutical factories, or laboratories, humidity is always a key parameter affecting product quality and operational safety. To ensure stability and high accuracy, selecting the appropriate humidity sensor is the first and most important step.

1. The Importance of Humidity Sensors in HVAC – BMS Systems

Humidity sensors not only help monitor air conditions but also serve as a core component in automated BMS and HVAC control systems.

A standard-compliant device helps to:

• Maintain ideal humidity levels for products or processes.
• Prevent condensation, mold, or static electricity.
• Protect electrical equipment, machinery, and sensitive materials.
• Optimize energy usage through precise control of fans, dampers, dehumidifiers, or cooling systems.

2. Criteria for Selecting Suitable Humidity Sensors for Different Environments

a. Cold Storage – Low Temperature, High Humidity Environment

• Recommended measurement range: 0–100% RH
• Special requirement: Sensors must resist condensation and operate reliably at subzero temperatures.

Suggestion: Use Dwyer sensors with remote probes, moisture- and frost-resistant, ensuring long-term accuracy in cold environments.

b. Pharmaceutical Plants – Strict GMP Compliance

• High accuracy: ±2% RH or better.
• Easy integration: Compatible with 4–20mA or 0–10VDC signals for PLC or BMS connection.
• Calibration options: Choose devices that allow field calibration to ensure continuous data during production.

Recommendation: Dwyer Series RHP or HHT sensors are ideal choices.

c. Laboratories – Fast and Stable Response Required

• Quick response for precise control of air conditioners and dehumidifiers.
• Integrated temperature-humidity measurement to minimize errors caused by ambient temperature.
• Probe design with protection against interference and fine dust.

3. Common Mistakes When Selecting Humidity Sensors

• Choosing a sensor incompatible with the control system signal.
• Ignoring actual environmental conditions (extreme temperature or humidity).
• Overlooking regular calibration, leading to increasing measurement errors over time.
• Using sensors in chemically harsh or dusty environments without protective probe casing.

4. DLK Vietnam – Dwyer Humidity Sensor Solutions for All Applications

As the official distributor of Dwyer Instruments (USA) in Vietnam, DLK Vietnam provides comprehensive humidity sensor solutions for various sectors:

• Cold storage, food warehouses, agricultural storage
• Pharmaceutical and cosmetic factories
• Cleanrooms, laboratories, research centers
• HVAC – BMS systems in buildings, hospitals, data centers

DLK not only supplies genuine products but also offers technical consultation, installation support, and periodic calibration, ensuring customers the performance and longevity of their devices.

5. Conclusion

Choosing the right humidity sensor not only ensures environmental stability but also saves energy, enhances accuracy, and extends system lifespan.

With authentic Dwyer sensor lines, DLK Vietnam is a trusted technical partner for specialized environmental measurement and control solutions.

Contact DLK Vietnam for detailed consultation and to select the right Dwyer sensors for your system.