Non-contact optical measurement
With hundreds of installations worldwide, the KPM Sheet Break Detector is recognized as the best sheet break detector on the market. Both the KB2 and the KB2 Ranger models offer a non-contact sensor that is suitable for dirt, steam and hightemperature installations or where space is limited. The airpurged sensor head stays clean while monitoring for sheet breaks in the harshest environments.

The KB2 Ranger is designed to monitor sheet breaks from the side of the paper web and works with all machine set-ups; against felt/wire/cylinder and open draw. The non-contact, adjustable sensor head can be positioned with free angle towards the paper web, making it the most flexible sensor available on the market. It is also immune to all colors, grades, ambient light changes and high-intensity LED camera lights.

Easy to set up
Both models have large display units with a logical user interface that allows easy setup of the break detection by selecting the measurements that give the highest signal difference.

Break and maintenance alarms are wired to the PLC or DCS.

The KPM KB2 Ranger has a single, one-button calibration during startup removing the need for complicated, gradespecific settings. The KB2 Ranger’s proprietary software looks for changes in the RGB profile during a sheet break and updates the profile automatically. 4-20 mA current outputs for the signal levels are available as an option.

Fast break detection
Both the KB2 and KB2 Ranger have digital signal processing technology that measures all signals at a 1,000 times per second, making them immune to ambient light changes by measuring the backlight intensity. The break detection delay is a minimum of 15 milliseconds, and thanks to the digital filtration, the user can select how many measurement cycles are used for the break alarm.

RGB and infrared light measurement
KPM KB2 has RGB or infrared light sources to perform superiorly on all paper and board grades and applications, regardless of color. The RGB color measurement can handle all sheet, wire and felt colors providing reliable break detection. In addition to open-draw applications, the breaks can be detected against felt, wire, or even against a cylinder.

Electronics located outside harsh environment
While the sensor head can be exposed to high temperatures, the electronics unit is mounted outside of the paper machine hood, ensuring reliability – even in a 100% humidity environment. The fiber optic cables can be supplied in various lengths, up to 12 meters.