Process Sensors Corporation

Guardian-HD Web Profiling System

Complete web profiling for challenging converting processes

Accurate moisture, coat weight and film thickness profiles for process control in even the most difficult converting applications



The Guardian-HD supports process optimization by accurately measuring moisture and coating thickness, providing a complete zoned web profile of narrow or wide webs. Reduce start-up times and waste by visually identifying production inefficiencies for quick return on investment. Intuitive graphical displays provide critical production insight for rapid identification of out of spec product. 

Reliable performance for challenging converting applications

The new Guardian-HD Web Profiling System is designed specifically for reliable operation in the challenging conditions found in paper and converting processes with a sealed industrial frame and new powerful linear actuator.

Moisture and coat weight measurements can be made on many substrates including paper, film, foil, textiles, release liners, tags, tapes and labels. The Guardian-HD Web Profiling System is commonly used in the following applications:

  • Hot Melt & Film Thickness
  • Wet End Water Based Coat Weight
  • Dry End Organic Coat Weight
  • Exit and Inlet Dryer Moisture
  • Re-Moisturizers (LAS, Steam Curtains and Water Decks)

Reduce waste, improve quality and maintain consistent web profile

Guardian-HD systems are accurate, fast, reliable & low maintenance. They provide a non-contact, non-destructive on-line measurement and are unaffected by relative humidity, changes in product temperature, ambient light and temperature. Guardian-HD Near Infrared (NIR) Systems have many other benefits and advantages:

  • Minimize edge curl and lay flat issues
  • Easily connect to closed loop control systems or local alarms
  • Decrease manual start-up times by up to 20% by eliminating the need for time consuming lab testing and adjustments
  • Unlike X-ray systems, NIR technology does not present an employee health hazard
  • Easy calibration, operation & standardization

Choose your Guardian-HD - Elite or Essential

All Guardian-HD systems include an industrial scanning frame, an NIR smart sensor and local touchscreen display for cross direction web profiling. 

Elite Web Profiling SystemMultiple moisture and coat weight profiles in one display

Powerful features and the ability to monitor and control one or multiple lines simultaneously

The Elite Guardian-HD Web Profiling System connects to a local display and a 19" Windows®-based PC at a central console. Larger displays are available for monitoring multiple line profiles at a single central console.

  • Central monitoring of single or multiple Guardian-HD systems
  • Windows®-based 19" touch screen industrial PC with proprietary ViewerSuite  software pre-installed
  • Advanced roll reporting and raw data logging capabilities for traceability and audits:
  1. Complete roll recording including measurement value, date, time, length product name, etc.
  2. Web scan average and individual zone measurements
  3. Automatic sync of roll reports to local network
  • Storage of up to 100 product recipe codes
  • Up to 100 individual zones across the web
  • Easy to read 5.7" local touch screen for calibration and troubleshooting
  • Designated lane and machine direction measurements and trending

Essential Web Profiling System

Intuitive operator interface for single line control and monitoring

The Essential Guardian-HD Web Profiling System connects to a 12" operator interface for simple profile display and controls.

  • Single scanner operation
  • Easy-to-read 12" high resolution non-Windows® based display
  • Raw data logging capabilities with export to .csv, .xml or .txt
  • Storage of up to 100 product recipe codes
  • Up to 50 individual zones across the web
  • Lane and machine direction measurements

The PSC advantage

Process Sensors' deep industry knowledge and commitment to our customers' long-term success ensures you receive the best product for your specific application and full support when you need it during and after installation.



Scanning Frame

Available Widths
Custom frame widths available to 6m (20').
• 3x 4-20mA Selectable sources • Live NIR Value • Scan NIR Average Values • Live Temperature & Scan Temperature Average Value
• Web Break • Web Length • Cooling Air • Sensor Window Purge
Ambient Temperature:
0-50°C (32-120°F) with air cooling up to 80°C (160°F)
Data Bus Interfaces, Simultaneous Temperature measurement, 4X Alarm Relays, Stack Light Alarm

NIR Measurement

Moisture Range
Min 0.1%, Max 95%
Coatings Range
Min 0.1 GSM, Max 250 GSM
Moisture Accuracy
Coatings Accuracy
±0.1 GSM
Product Temperature
80°C (160°F)

Elite Web Profiling System

NIR Consituents
Up to three (2 NIR plus product temperature)
Recipe Codes
Communication to Frame
Multi-Frame Operation
19” Screen – Larger Optional

Essential Web Profiling System

NIR Constituent
Up to two (2 NIR or 1 NIR plus product temperature)
Recipe Codes
Communication to Frame
24VDC from Frame


Our experienced team is eager to answer your application questions and demonstrate how our technology can solve the challenges you face every day. Request a demo today.