The Demeq QS3 Ultrasonic Wall Thickness Gauge is a portable, high-performance instrument designed to measure the thickness of materials from one accessible side only. It is primarily used to evaluate metal components and structures affected by corrosion, erosion, and wear, helping maintenance and inspection teams monitor asset condition and prevent costly failures.
In addition to metals, the QS3 can also accurately measure a range of homogeneous non-metallic materials, including plastics, ceramics, and glass. Its combination of portability, accuracy, data storage, and reporting capabilities makes it ideal for maintenance, quality control, manufacturing, and asset integrity applications.
Key Features
- Non-destructive ultrasonic thickness measurement
- Measures wall thickness from one side only
- Ideal for monitoring corrosion, erosion, and wear
- Suitable for metallic and non-metallic materials
- Fast and accurate thickness readings
- Portable, lightweight, and easy to operate
- Internal memory stores up to 5,000 measurements
- Suitable for workshop, field, laboratory, and quality control applications
- USB data transfer capability on QS3 DL models
- Compatible with dmq DataCenter software for analysis and reporting
Materials Measured
The QS3 is designed to measure the thickness of a wide range of homogeneous materials. Homogeneous materials have a consistent internal structure, allowing ultrasonic sound waves to travel at a predictable speed and ensuring accurate measurements.
Metals
- Carbon steel
- Stainless steel
- Aluminium
- Copper
- Brass
- Bronze
- Cast iron
- Engineering alloys
Non-Metallic Materials
- Plastics
- Ceramics
- Glass
- Other homogeneous materials with known sound velocities
This versatility makes the QS3 suitable for a wide range of industrial inspection and manufacturing applications.
Advanced Data Logging and Reporting
Both QS3 models feature onboard memory capable of storing up to 5,000 thickness readings, allowing users to collect extensive inspection data directly in the instrument without manual recording.
QS3 DL Data Logger Model
The QS3 DL offers enhanced inspection management through USB connectivity and compatibility with dmq DataCenter software. Measurement data can be transferred directly to a PC for further analysis, reporting, and long-term record keeping.
Using dmq DataCenter software, users can:
- Download and organise inspection data
- Store historical thickness measurements
- Generate professional inspection reports
- Analyse wall-loss trends caused by corrosion and wear
- Compare current readings with previous inspections
- Export data for further analysis
- Maintain traceability and asset history records
- Support maintenance and compliance documentation
These features help improve data accuracy, reduce paperwork, and simplify asset integrity management programs.
Typical Applications
Corrosion Monitoring
Measure remaining wall thickness in structures and equipment exposed to corrosion.
Pipe and Pipeline Inspection
Monitor wall loss caused by internal and external corrosion, erosion, and wear.
Storage Tanks
Assess tank wall condition and identify thinning in critical areas.
Pressure Vessels and Boilers
Verify wall thickness to support safe operation and maintenance planning.
Manufacturing & Quality Control
Confirm material thickness specifications during production and final inspection.
Maintenance & Asset Integrity Programs
Track thickness changes over time to support predictive and preventive maintenance strategies.
Plastics, Glass & Ceramics
Measure suitable non-metallic materials in industrial, manufacturing, and research environments.
Key Benefits
- Fast and reliable thickness measurement
- Non-destructive testing from one accessible side
- Suitable for both metallic and non-metallic materials
- Designed for corrosion and wear monitoring applications
- Internal memory for up to 5,000 readings
- USB data transfer and software reporting with QS3 DL
- Improved inspection efficiency and traceability
- Reduced downtime and maintenance costs
- Supports long-term asset integrity management
The Demeq QS3 Ultrasonic Wall Thickness Gauge provides a comprehensive solution for thickness measurement, corrosion monitoring, quality assurance, and preventive maintenance. With its broad material compatibility, onboard data storage, and advanced reporting capabilities through dmq DataCenter software, the QS3 helps organisations make informed maintenance decisions while improving equipment reliability, safety, and operational efficiency.
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.
