The Demeq QS5 Ultrasonic Wall Thickness Gauge is an advanced thickness measurement instrument designed for corrosion monitoring, condition assessment, and preventive maintenance of metal components and structures. Using ultrasonic technology, the QS5 accurately measures wall thickness from one accessible side, making it ideal for applications where internal access is not possible.
The QS5 is primarily used to detect corrosion, erosion, and wear in metal assets such as pipelines, pressure vessels, storage tanks, boilers, and structural components. Advanced models feature Multi-Echo technology, enabling accurate thru-paint measurements without the need to remove protective coatings, reducing inspection time and preserving asset integrity.
With a range of advanced inspection tools including real-time B-Scan imaging, statistical analysis, material condition analysis, and coupling quality monitoring, the QS5 provides inspectors with valuable information beyond simple thickness measurement, helping improve maintenance decisions and asset reliability.
Key Features
- Advanced ultrasonic wall thickness measurement
- Designed for corrosion and wear monitoring
- Measures from one accessible side only
- Suitable for coated and uncoated metal surfaces
- Multi-Echo technology for thru-paint measurements (selected models)
- Real-time B-Scan graphical display
- Material Condition Analyser
- Coupling Energy Level Indicator
- Advanced statistical analysis functions
- Fast, accurate, and non-destructive testing
- Portable and rugged design for field inspections
- Data logging and PC connectivity on DL models
- Compatible with dmq DataCenter software
Advanced Inspection Tools
Material Condition Analyser
The Material Condition Analyser helps inspectors assess the quality of the ultrasonic signal and identify potential changes in the material structure. This provides additional confidence in measurement reliability and assists in identifying areas that may require further investigation.
Coupling Energy Level Indicator
The coupling indicator continuously monitors the quality of contact between the transducer and the test surface. This helps users ensure optimum signal transmission and improves the accuracy and consistency of measurements.
Real-Time B-Scan Graphics
The QS5 features a real-time B-Scan display, providing a cross-sectional visual representation of thickness variations across a component.
Benefits include:
- Improved corrosion mapping
- Identification of localised thinning
- Detection of pitting and wear patterns
- Enhanced interpretation of inspection results
- Better assessment of asset condition
Statistical Analysis Functions
Built-in statistical tools help users evaluate inspection data more effectively by calculating:
- Average thickness
- Minimum and maximum readings
- Range of measurements
- Statistical variation
- Trend analysis
These functions help inspectors quickly identify areas of concern and assess overall component condition.
Multi-Echo Thru-Paint Measurement
Selected QS5 models incorporate Multi-Echo technology, allowing measurements to be taken directly through paint and non-metallic coatings.
Benefits of Thru-Paint Measurement
- No coating removal required
- Faster inspection processes
- Reduced labour costs
- Preserves protective coatings
- Minimises equipment downtime
- Ideal for corrosion surveys and maintenance programs
This capability makes the QS5 particularly valuable for industries where coated assets require routine inspection.
Data Logging and Reporting
QS5 DL Models
DL models allow inspection data to be stored directly in the instrument and transferred to a PC for further analysis and reporting using dmq DataCenter software.
dmq DataCenter Software Features
- Download and organise inspection data
- Store historical measurements
- Generate professional inspection reports
- Analyse corrosion and wear trends
- Compare current and previous inspections
- Export data for further analysis
- Maintain asset history and traceability records
- Support quality assurance and compliance requirements
These capabilities streamline inspection workflows and improve long-term asset management.
Typical Applications
Corrosion Monitoring
Measure remaining wall thickness in assets exposed to corrosive environments and monitor deterioration over time.
Pipeline Inspection
Evaluate internal and external corrosion in pipelines and process piping systems.
Storage Tanks
Assess tank wall condition and identify thinning caused by corrosion or abrasion.
Pressure Vessels and Boilers
Verify wall thickness to support safe operation, maintenance planning, and regulatory compliance.
Oil & Gas Industry
Inspect critical infrastructure without removing protective coatings.
Manufacturing and Quality Control
Confirm material thickness and product integrity during production and final inspection.
Power Generation and Heavy Industry
Monitor condition of high-value assets exposed to wear, erosion, and extreme operating conditions.
Key Benefits
- Fast and non-destructive wall thickness measurement
- Accurate corrosion and wear monitoring
- Thru-paint inspection capability on Multi-Echo models
- Real-time B-Scan imaging for enhanced analysis
- Advanced statistical and condition analysis tools
- Improved inspection efficiency and reliability
- Reduced coating removal and preparation time
- Data logging and comprehensive reporting capabilities
- Supports predictive maintenance and asset integrity programs
The Demeq QS5 Ultrasonic Wall Thickness Gauge combines advanced measurement technology, real-time inspection tools, and powerful data management capabilities to provide a complete solution for corrosion monitoring, wall thickness measurement, and asset integrity management across a wide range of industrial applications.
Demeq Ultrasonic Wall Thickness Gauge Comparison
The Demeq QS2, QS3, and QS5 are all ultrasonic wall thickness gauges designed to measure material thickness from one accessible side. While they share the same core measurement principle, each model offers a different level of functionality to suit varying inspection and asset management requirements.
| Feature | QS2 | QS3 | QS5 |
|---|---|---|---|
| Instrument Type | Ultrasonic Wall Thickness Gauge | Ultrasonic Wall Thickness Gauge | Advanced Ultrasonic Wall Thickness Gauge |
| Primary Application | General thickness measurement | Corrosion monitoring and data logging | Advanced corrosion inspection and asset integrity |
| One-Side Measurement | ✔ | ✔ | ✔ |
| Measures Metal Thickness | ✔ | ✔ | ✔ |
| Measures Plastics | ✔ (adjustable velocity models) | ✔ | Limited, application dependent |
| Measures Ceramics & Glass | ✔ (adjustable velocity models) | ✔ | Limited, application dependent |
| Corrosion Monitoring | Basic | Advanced | Comprehensive |
| Internal Memory | Available on datalogger models | Up to 5,000 readings | Available on DL models |
| PC Data Transfer | Datalogger models via DataCenter | USB via QS3 DL | USB via QS5 DL |
| Statistical Analysis | Basic | Basic | Advanced |
| Real-Time B-Scan Display | ✘ | ✘ | ✔ |
| Material Condition Analyser | ✘ | ✘ | ✔ |
| Coupling Energy Level Indicator | ✘ | ✘ | ✔ |
| Multi-Echo Thru-Paint Measurement | ✘ | ✘ | ✔ |
| Advanced Corrosion Mapping | ✘ | ✘ | ✔ |
| Best Suited For | General inspections | Corrosion surveys and record keeping | Professional NDT and asset integrity programs |
QS2 – General Purpose Thickness Measurement
The Demeq QS2 is the ideal entry-level wall thickness gauge for routine maintenance and quality control applications.
Typical Applications
- Fire extinguishers
- Boilers
- Pressure vessels
- Pipes and tubing
- Manufacturing quality control
- General maintenance inspections
Key Advantages
- Simple operation
- Cost-effective solution
- Measures a wide range of materials
- Available in steel-only and multi-material versions
- Suitable for occasional and routine inspections
Best for: Users who need reliable thickness measurements without advanced inspection or reporting requirements.
QS3 – Corrosion Monitoring and Data Logging
The Demeq QS3 is designed for users who require more advanced inspection management and traceability.
Typical Applications
- Corrosion monitoring programs
- Storage tank inspections
- Pipeline surveys
- Asset integrity inspections
- Maintenance contracting
Key Advantages
- Stores up to 5,000 readings
- Measures metals, plastics, ceramics, and glass
- USB data transfer via QS3 DL models
- Compatible with dmq DataCenter software
- Improved inspection record keeping and reporting
Best for: Maintenance teams and inspectors who need onboard data storage and professional reporting capabilities.
QS5 – Advanced Corrosion Inspection and Asset Integrity
The Demeq QS5 is the most advanced wall thickness gauge in the Demeq range and is specifically designed for demanding industrial inspection applications.
Typical Applications
- Oil and gas facilities
- Mining and heavy industry
- Power generation plants
- Asset integrity programs
- Professional NDT inspections
- Corrosion mapping projects
Key Advantages
- Multi-Echo thru-paint measurement
- Real-time B-Scan imaging
- Material Condition Analyser
- Coupling Energy Level Indicator
- Advanced statistical analysis
- Enhanced corrosion assessment capabilities
- Comprehensive data logging and reporting options
Thru-Paint Measurement
Selected QS5 models can measure wall thickness directly through paint and protective coatings without removing them, helping to:
- Reduce inspection time
- Preserve coating systems
- Minimise downtime
- Improve inspection efficiency
Best for: Asset integrity professionals and inspectors requiring advanced diagnostic tools, corrosion analysis, and high-level reporting capabilities.
Quick Selection Guide
Choose the QS2 if:
- You need a simple and economical thickness gauge.
- Your inspections are primarily routine maintenance or quality control tasks.
- Advanced reporting and corrosion analysis are not required.
Choose the QS3 if:
- You need to store and manage inspection data.
- Corrosion monitoring is a regular part of your maintenance program.
- You require USB data transfer and reporting.
Choose the QS5 if:
- You require advanced corrosion assessment tools.
- You need thru-paint measurement capability.
- Real-time B-Scan imaging is important.
- You manage critical assets where comprehensive inspection data is essential.
Summary
The QS2 provides reliable everyday thickness measurement, the QS3 adds data logging and reporting for structured inspection programs, while the QS5 delivers advanced corrosion inspection, thru-paint measurement, B-Scan imaging, and asset integrity analysis for professional NDT and maintenance applications.
