Caliper sensor

Online Thickness Measurement

Key Features

Almost non-contact, double-sided online measurement
Light touch, no marking on the sheet using sapphire crystal
Wide measuring range
Tolerates sheet fluctuations

Measuring Method

The Scienta Thickness Sensor operates on the principle of magnetic reluctance. Due to the light touch on the sheet, the sensor ensures high accuracy without marking of the sheet. Further, sensor heads are mounted on sliding stems and therefore sheet pass line variations do not affect the measurement. Thanks to the proprietary electronics the frequency signal is very stable and the sensor does not require a periodic standardization cycle.

Benefits

To various process applications such as paper, paperboard, nonwovens, plastic films etc.

Modern, proven sensor design
Wide measuring range, 40 – 1000 µm
Good correlation to lab results
Service free construction
Easy and convenient to install and operate
Full range of scanners available
Tailor made head designs for various applications

No web marking due to light touch on sheet using sapphire crystal glass surface
Sheet vibrations does not effect the measurements
Real time information
Measures thin papers & transparency films
Easy calibration and setup
One calibration for multiple grades
No periodic standardization cycle needed

Technical Specifications

Sensor Type	7240 A
Construction	Double sided sapphire crystal
Measuring Method	Magnetic reluctance
Measuring Range	40 – 1000 µm
Accuracy	2 g/m ² (2 σ)
Repeatability	0,3-1,5 µm
Dynamic Correlation	1,5 µm
Dynamic Accuracy	4 µm (2 sigma)
Power Requirement	+24V, 2A
Installation	Scanning /Fixed

Sensor Type	7240 A
Head parallelism	1°
Head parallelism Heads/ Sheet Plane	2°
Shifts between Heads, horizontal tolerance	1 mm
Dust protection	Rubber bellows
Air pressure requirement	5-8 bar
Air requirement	oil frree instrument air
Temperature Range	20- 60 °C
Air consumption	O210 l/ min