Jasch Industries Limited, 43/5 Bahalgarh Road, Sonipat – 131 021 (Haryana) INDIA.
Phone: +91 130 3053600, 6451517, 6451518 Fax : +91 130 3053699 E-mail Us
  • QCS for Paper, Board and Tissue Machines

    Measurement - Control - Feedback for multiple layers.
  • For high speed production Lines

    High speed scanning measurement
  • Steam optimization

    Production steam savings
  • Auto Grade change

    Increased production efficiency.
  • BTG 3000PP

    Decoupled control of Basis Weight, Moisture and Ash

QCS for Paper, Board and Tissue

Quality Control System for Paper, Board and Tissue Machines

(BTG – 3000PP)

BTG-3000PP online measurement systems continuously monitor the basic parameters of the paper, like Basis weight, Moisture, Ash and Caliper. The deviations from the preset Target values are continuously displayed on the monitor and immediate corrections are applied to the production process through Machine Direction control of Basis weight, Moisture and Ash content, which in turn results in enhancement of the paper quality and material savings. In addition, Cross Direction control of Basis Weight, Moisture and Caliper can also be incorporated in association with partner companies. Worldwide installations are evidence of the market acceptance and capability of our BTG-3000PP QCS system.


  • Non-contact measurement
  • High speed scanning measurement
  • Air gap temperature compensation for measurement on hot webs
  • Automatic calibration after pre-defined interval for measurement stability
  • Automatic edge-detection of the web for accurate profile mapping
  • Highly precise (optionally pressurized) O-frame free from deflection and misalignment
  • Comprehensive Production Reports
  • Decoupled control of Basis Weight, Moisture and Ash
  • Dead time (transport lag) compensation through Smith Compensator
  • Feed forward compensation from consistency transmitters
  • Dryer shut down in case of paper break
  • Steam optimization
  • Jet/Wire Ratio Control
  • Auto Grade change


Technical Specifications

A Basis Weight Sensor – Beta Source”QCS measures the Basis weight (g/m2) which is the quality production parameter of the paper used by the operators to ensure that their production is always within the acceptable weight range. The measuring principle of Basis weight is based on the attenuation of Beta radiations emitted by a nuclear source as it passes through the paper/board.

Basis Weight Sensor Specifications

  • Beta Transmission Sensor 200mCi Kr85 Radioisotope (10-1000 g/m2)or 500 mCi Pm147 (10-200 g/m2 ).
  • Accuracy & Repeatability : ±0.25% or 0.25 GSM (whichever the greater)
  • Sampling Time : 10msec
  • Air Gap : 10mm
  • Operating Temperature : 0-70OC
  • Ionization Chamber Detector
  • Integrated signal conversion through 24 bit A/D converter with in-built digital filters
  • Measuring Spot Size : 12mm
  • Insensitive to paper formation

B Moisture Sensor – NIR / Microwave The next most important measurement in the paper industry is the Moisture measurement. This measurement enables the machine operators to keep the water content in the paper within acceptable limits and is especially useful for optimizing the production capacity.

Based on the GSM range, two types of Moisture sensors can be offered i.e. Near Infra-red (IR) or the Microwave radiation type.

NIR sensor is most suitable for fine paper and lighter paper grades. The measurement is based on the principle that when infrared light passes through or is reflected by a paper sheet, it is preferentially absorbed at very specific wavelengths by the water in the sheet more so than fiber or other sheet components.

The Microwave Moisture Sensor is most suitable where GSM of paper is higher than 150 GSM and bulk moisture measurement is required or where there is high carbon black content in paper. The sensor is commonly used for Craft and Duplex boards. The moisture content measurement is based on shift in resonant frequency of a cylindrical cavity by presence of a strong dielectric, like water.

Moisture Sensor Specifications

Near Infrared Transmission/Back-scatter Sensor

  • Measurement Range : 0-15%
  • Accuracy & Repeatability : +1%
  • Measurement Spot Size : 20mm circular
  • Operating Temperature   : 0-70oC
  • Sampling Time: 10msec.
  • Insensitive to paper scattering by using special scattering optics
  • Carbon black compensation

Microwave Sensor

  • Insensitive to ink residues in recycled paper or color of the sheet
  • Insensitive to surface structure or moisture stratification.
  • Insensitive to fillers such as China clay or whiteners
  • Sampling Frequency : 100 samples per second
  • Measurement Range : up to 100 GSM of water
  • Measuring gap : 10mm
  • Measuring Area : Circular 50×50 mm
  • Operating Temperature Celsius : 0-70oC

C Ash Sensor – X-ray The Ash measurement is based on the absorption of X-ray radiations by the inorganic materials like Clay, Calcium Carbonate & Titanium Dioxide in the paper and as these contents vary during production the transmitted radiations that are captured by the ion chamber type detector also vary accordingly.

Ash Sensor Specifications

  • X-Ray Transmission Sensor : 2W, 10KV (max)
  • Measurement Range : 10 -400 GSM
  • Accuracy & Repeatibility : ±0.4%
  • Air Gap : 10mm
  • Sampling Time : 10msec.
  • Operating   Temp. : 0-700C
  • Ionization Chamber Detector
  • Measurement Spot Size : 12mm

D Caliper Sensor The Caliper measurement principle is based on electromagnetic induction produced by two contact type components, an inductive coil housed inside a sapphire disk and the ferrite target laminated with an ultra thin sapphire wafer, mounted on the opposite bellows. As the thickness of the paper passing through these bellows change, the distance between them also changes, resulting in the change of coil inductance which is measured through a coupled oscillator circuit.

Caliper Sensor Specifications

  • Measurement Range : 0.02 -1.00 mm
  • Repeatability : 0.5µmicron
  • Dynamic Correlation : 1.5µmicron
  • Long term stability : 1.0µmicron
  • Sampling Time : 10msec

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