Precision Moisture Monitoring forUltra-Dry and Harsh Industrial Environments

Nexisense HG808-G series is designed for accurate trace moisture detection in extreme dry and corrosive conditions. Widely used in lithiumbattery production, semiconductor manufacturing, nitrogen generation, compressed air systems, and natural gas treatment, the HG808-G delivers superior accuracy, corrosion resistance, and real-time dew point analysis.

Product Definition

The HG808-G series is a high-end online dew point meter tailored for industrial-grade humidity control. It uses advanced capacitive sensortechnology to provide real-time trace moisturemonitoring, ensuring production safety, quality assurance, and efficiency in key processes such as batteryelectrolyte filling, gas purification, and inert gas control.

Working Principle

The core measurement principle is based on high-precision capacitive humidity sensing. It detects the temperature at which moisture condenses in gas (dew point)and calculates the actual water vapor content:

• Gas flows into the chamber and contacts the sensing element

• When vapor reaches saturationand condensation occurs, the dew point is detected

• The dew point is converted into ppm orrelative humidity for output

• Real-time monitoring and remote diagnostics are supported via digitalcommunication

Application Scenarios

This device is widely usedin:

• Lithium battery workshops: Ensuresultra-dry conditions for electrolyte filling and cell sealing

• Semiconductor fabs: Monitors dry gas purity in photolithography and packaging processes

• Compressed air systems: Preventswater condensation and downstream equipmentdamage

• Nitrogen/Oxygen generators: Controls final gas humidity toensure purity

• Natural gas dehydration: Prevents hydrate formation and pipeline corrosion

• Inert gas systemsin electronics: Maintains dry environments for high-qualityprocessing

Structural Design

The HG808-G features an IP65 corrosion-resistant housing and modular sensor structure for demanding environments:

• High-performance German sensor element for fast, stable readings

• Aluminum alloy shell with anti-corrosion coating, suitable for chemical gas conditions

• Intelligent microprocessor for self-calibration, error diagnostics, anddata logging

• Supports RS485/Modbus and 4-20mA output, easily integrates with PLC/DCS

• Backlit LCD display for onsite reading and quick maintenance

Measurement Modes

The HG808-G supports flexible output formats to meet diverse industrial needs:

• Dew Point (°C):Direct dew point temperature measurement

• PPM/V: Water vapor concentrationfor gas treatment applications

• Relative Humidity: Combined output with ambient temperature

• Auto Calibration & Temperature Compensation: Ensures accuracy inchanging field conditions

Technical Specifications

Key Advantages

• Superior CorrosionResistance: Ideal forharsh chemical gas environments

• Low Power Operation: Suitable for remote sitesand unmanned stations

• Stability: Minimal signal driftand strong noise immunity

• Modular Design: Hot-swappable probes for fast maintenance

• Remote Diagnostics: Data upload and alarm via Modbus

• Proven in the Field: Successfully deployed in major battery, gas, and chemical plants

Conclusion

The Nexisense HG808-G dew point meter is a high-precision, corrosion-resistant, and intelligent solution for real-time trace moisture monitoring in demanding industrialenvironments. With its robust performance, field-proven design, andversatile connectivity, it stands as the ideal choice for industries requiring accurate and long-term dew point control.

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