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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.

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
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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.


Process Insights_COSA Xentaur_lockup

Dew Point Solutions with Aluminum Oxide Sensors 

LPDT™ SERIES

COSA XENTAUR™ compact 2-wire loop-powered dew point transmitter designed for continuous online moisture monitoring
COSA LPDT DEW POINT TRANSMITTER

XPDM™

COSA XENTAUR™ portable battery-powered handheld dew point meter
Process Insights_COSA XPDM dew point meter

XDT™ SERIES

COSA XENTAUR™ dew point transmitters to monitor in dry gases including Hydrocarbons, Instrument Air / Air Dryers, Hydrogen
Process Insights_XDT dew point meter

XDT™ SERIES EX

DISCONTINUED
Process Insights COSA XDT Explosion Proof

HDT-LQ™ SERIES

COSA XENTAUR™ digital moisture in liquid hydrocarbon transmitters
Process Insights_COSA HDT LQ 3 (2)

HDT™ SERIES

COSA XENTAUR™ rugged, loop-powered online moisture transmitter for harsh environments
Process Insights_COSA HDT SERIES DEW POINT METER TRANSMITTER

ESS™

COSA XENTAUR™ Dew Point Extractive Sampling System
Process Insights_COSA Dew Point Extractive Sampling System ESS

ESS-SCVP™

COSA XENTAUR™ Mission Critical Process Moisture Analyzer System for demanding environments
Process Insights_ESS-SCVP Mission Critical Process Moisture Analyzer
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