- Distributed control system
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Industrial applications
- For Pulp
- For Board & Paper
- For Tissue
- For Energy
- For Marine
- For Alternative fuels
- Quality management
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Analyzers and measurements
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Analyzers
- Brown Stock Quality Analyzer
- Chip 'n' Bark Moisture Analyzer
- Recovery Liquor Analyzer
- Dirt Count Analyzer
- Fiber Image Analyzer
- Kappa Analyzer
- Paper Lab
- MR Moisture
- Pulp Expert
- Fiber Furnish Analyzer
- Retention Measurement
- Stand-Alone Retention Control
- Wet End Analyzer
- Corrosion Reduction Analyzer
- Cooking Liquor Analyzer
- Inline sensors
- Samplers
- Consistency
- Conductivity
- Boiler diagnostics systems
- Wastewater
- Vibration
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Analyzers
- Condition monitoring
- Industrial Internet
- Automation services
- Automation
- Quality management
- Quality control system (QCS)
- Measurements
- Moisture
- MW Moisture Measurement
Valmet IQ MW Moisture Measurement
Valmet IQ MW Moisture Measurement is dual sided and non-contacting. It provides the moisture content of a web by measuring microwave resonance changes that take place with moisture content changes.
Features
The moisture sensor is a dual-frequency cavity resonator excited by a low-power microwave signal. One resonance frequency varies in proportion to the total moisture in the sheet. Another frequency, insensitive to the water, is used as a reference. The frequency difference between the resonance peaks is a measure of the moisture content. Combined with an accurate basis weight measurement, the result is a reliable measurement of the moisture content.
The microwave moisture measurement is particularly suited to multiply boards since the longer wave microwave energy pe-netrates through the entire sheet measuring the moisture in all plies with equal sensitivity. It is not affected by moisture strati-fication, freeness changes, sheet composition, or contaminants from recycled furnish. Neither web fluttering nor varying air humidity affects the measurement performance. Temperature changes are automatically compensated in the moisture readings.
Benefits
- Accurate and stable measurement for precise control of moisture in machine and cross directions covering all applications from paper to pulp.
- Faster on-spec quality and therefore reduced start-up waste.
- Reduction in rejects due to moisture streaks, roll quality and related issues.
- Minimization of energy consumption by precise moisture control.
- Allows moisture to be increased to save furnish in some grades.