HDT Series Aluminum Oxide Moisture Analyzer
HDT Series Aluminum Oxide Moisture Analyzer
Moisture contamination can lead to corrosion, hydrate formation, reduced product quality, equipment damage, and costly downtime. Continuous dew point monitoring helps protect assets while ensuring reliable process performance.
The COSA XENTAUR™ HDT™ Series Dew Point Transmitter combines patented HTF™ (Hyper-Thin-Film) aluminum oxide sensor technology with a rugged, loop-powered design to deliver reliable online moisture measurements from -100°C to +20°C dew point. Designed for harsh industrial environments, the HDT Series provides fast response, exceptional long-term stability, hazardous-area approvals, and dependable performance in compressed air, natural gas, hydrogen, industrial gases, petrochemical processing, semiconductor manufacturing, and OEM equipment. Contact us today for more infomation.
Why Choose the HDT Series?
Benefits
- Continuous online dew point monitoring
- Loop-powered 4–20 mA transmitter
- Patented HTF™ aluminum oxide sensor
- Dew point measurement from -100°C to +20°C
- Fast moisture response
- Excellent long-term stability
- Very low sensor drift
- High measurement accuracy
- Hazardous-area approvals
- Compact industrial design
- Rugged construction for harsh environments
- Easy PLC, DCS, and SCADA integration
- Low maintenance
- Long sensor life
- Optional HART communication
- Factory calibrated with temperature compensation
Why Monitor Dew Point?
Continuous dew point monitoring helps:
- Prevent corrosion
- Eliminate hydrate formation
- Protect compressors
- Extend dryer life
- Improve gas quality
- Protect catalysts
- Increase equipment reliability
- Reduce maintenance costs
- Improve product quality
- Maintain regulatory compliance
The HDT Series dew point transmitter is designed to operate in harsh industrial environments, with a rugged construction that can withstand extreme temperatures, humidity, and vibration.
Some of the industries that commonly use this type of transmitter include:
- Natural Gas: The natural gas industry uses dew point measurement to prevent hydrate formation, which can cause blockages in pipelines and damage equipment.
- Petrochemical: The petrochemical industry uses dew point measurement to ensure that moisture does not contaminate the final product, which can affect product quality and safety.
- Semiconductor: The semiconductor industry uses dew point measurement to prevent moisture from damaging sensitive electronic components during the manufacturing process.
- Power Generation: The power generation industry uses dew point measurement to prevent corrosion and damage to equipment caused by moisture in flue gas.
- Pharmaceutical: The pharmaceutical industry uses dew point measurement to control the moisture content in the manufacturing process, which can affect the stability and shelf-life of the final product.


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Why HTF Aluminum Oxide Sensor Technology?
Unlike conventional aluminum oxide sensors, HTF (Hyper-Thin-Film) technology provides improved sensor uniformity, faster response, enhanced stability, and lower long-term drift. This results in reliable moisture measurements across demanding industrial applications while reducing maintenance and recalibration frequency.
Applications
Compressed Air Systems
Monitor moisture to:
- Verify dryer performance
- Meet ISO 8573 air quality requirements
- Prevent corrosion
- Protect pneumatic equipment
- Reduce maintenance costs
Industrial Gas Manufacturing
Verify moisture in:
- Nitrogen
- Oxygen
- Argon
- Helium
- Specialty gases
- Welding gases
Natural Gas Processing
Continuously monitor dew point to:
- Prevent hydrate formation
- Protect compressors
- Improve gas quality
- Meet pipeline specifications
- Reduce corrosion
Petrochemical & Refining
Monitor moisture in:
- Hydrocarbon processing
- Feed gases
- Reactor systems
- Catalyst protection
- Process gas quality
Hydrogen Production & Distribution
Measure moisture in:
- Green hydrogen production
- Electrolyzers
- Hydrogen storage
- Fuel cell supply systems
- Hydrogen distribution networks
Semiconductor Manufacturing
Maintain ultra-dry gas conditions for:
- Bulk gas systems
- Specialty gases
- Cleanroom utilities
- Process gas monitoring
- Tool support gases
OEM Equipment
Integrate into:
- Air dryers
- Gas generators
- Process skids
- Gas purification systems
- Compressor packages
Food & Beverage
Monitor moisture in:
- Food-grade compressed air
- Packaging gases
- Process gases
- Beverage production
Frequently Asked Questions
What is a dew point transmitter?
A dew point transmitter continuously measures moisture content in gases by determining the temperature at which water vapor condenses. It provides a continuous signal for process control and quality assurance.
What is the HDT Series used for?
The HDT Series is used for continuous moisture monitoring in compressed air, natural gas, hydrogen, industrial gases, petrochemical processes, semiconductor manufacturing, and OEM equipment.
What is the measurement range?
The HDT measures dew point from -100°C to +20°C, making it suitable for extremely dry industrial gas applications.











