Tissue Weight Sensor

Online MIR Measurement

Key Features

Non-contact, double sided online measurement
Real-time, state-of-the-art mid-infrared measuring wavelengths
Basis Weight measurement of cellulose based tissue materials
More accurate online measurements using large optical components

Measuring Method

The Scienta MIR absorption-based sensor series 7230 is a double sided, 2-channel or 4-channel InGaAs detector-based Basis Weight sensor for online use. The sensor measures the Mid infrared light absorbed by different wavelengths caused by cellulose on sheet. This signal is digitalized and linearized to correlate to real weights in engineering units. Basis weight range is 5..100 g/m².

Benefits

To process applications such airlaid, nonwoven and tissue paper lines. The sensor is insensitive to ash, but recycled pulp can influence the measurement accuracy.

No radioactive source is required
Non-contact measurement
Service free construction
Easy and convenient to install and operate
Full range of scanners available
Easy calibration and setup
More accurate on-line measurements
Faster on-spec quality and reduced start up waste

Reduction in rejects due to high performing measurements
Minimization of energy consumption by accurate and reliable weight measurements and controls
Machine speeds can be increased on drying limited air laid and paper machines
Multiple channel sensor technology with micro-optic receiver

Technical Specifications

Sensor Type	7230-2	7230-4
Construction	Double sided	Double sided
Measuring Channels	2	4
Range	5 – 100 g/m²	5 – 100 g/m²
Accuracy	0,1 g/m²	0,2 g/m²
Repeatability	0,01 g/m²	0,01 g/m²
Recommended measurement Gap	13 mm	13 mm
Power Requirement	+24V, 1A	+24V, 1A
Installation	Scanning /Fixed	Scanning /Fixed

Sensor Type	7230-2	7230-4
Ambient Light Sensitivity	none	none
Interface Options	Profibus	Profibus
	Modbus	Modbus
Sheet color compensation	No	Yes
	2 x analog	2 x analog
Environmental Conditions	10-60 ℃ 10-95 % RH	10-60 ℃ 10-95 % RH
Liquid Cooling	Optional	Optional