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Analysis with Sigma

The electronic nip analysis system measures and calculates the nip width at different points along the rolls in real-time. The system Sigma-Nip consists of a series of sensors that are placed between the rollers together with an analysis program. The sensors can be positioned quickly and easily. They survive high pressures and are able to measure simultaneously with high accuracy and reproducibility. It is the ideal solution for setting all kinds of rolls.

The nip width measurement system consists of various sensors, based on thin film resistance technology, which are positioned at specific points between the rollers. Once the sensors are placed, the rolls can be closed. The Windows based software shows simultaneously the nip widths in an easily interpretable way on the screen. The user thus immediately detects if the rollers are adjusted.

Since the analysis system operates in real time, the rollers can be adjusted directly in the closed state. Changes in the alignment can be directly monitored on screen.

After proper adjustment the print out documents the final status.

Sigma-Nip comes complete with all necessary system components for quick and accurate nip width determination. The system consists 15 sensors, the sensor hub with USB cable, intuitive software and a standard notebook.

Sigma-Nip Sensors

The sensors are available in two different lengths to fit various diameters and roller covers. The standard sensor has a measuring length of 213 mm, while the mini-sensor covers a length of 84 mm. All sensors are calibrated individually.

Technical data

System specifications

Sigma-Nip senzor specifications


Thin-film resistance


Standard Sigma-Nip

Mini Sigma-Nip


300 mm/s

Active sensor length

213 mm

84 mm


± 6 %

Matrix points




± 98 %

Sensor thickness

0,381 mm

0,381 mm

Free Storage

200 MB

Temperature range

-18 do 150 °C

-18 do 150 °C

Main storage

128 MB RAM


1,3 mm

0,5 mm


USB Port

Nip-width range

3,8–213 mm

1,5–84 mm

Operating System

Windows 2000/XP/Vista/7

Min. Pressure

0,28 MPa

0,28 MPa


Actual version

Max. Pressure

70 MPa

70 MPa



Weight of Sensor

227 g

113 g






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