Application
The TU sensor serves for retrofitting a metal detector on existing lines as well as for mounting on conveyor belts and chutes that cannot be split. Though it is possible to split the sensor for mounting and to re-assemble it afterwards, the tunnel detector TU provides highest sensitivity for metal detection. Due to this characteristics and the possible fade-out of vibrations and of the product effect the sensor can be applied almost universally. Contrary to other sensors this one is completely made of stainless steel. This allows application in the plastics as well as in the food industry.

Function
Contrary to classic metal sensors the working principle of this device is based on a system of three coils. This enables the user to analyze signals precisely and to draw conclusions on their origin. By this it is for example possible to distinguish the signals into vibration, product or metal. This additional data allows a more sensible reaction on metallic residua. The sensor is maintenance- and calibration free.

Handling
Depending on the operating electronics the handling is realised via a membrane keyboard and a LC-display. Thus all important parameters can be viewed easily and fast and changed if necessary. The sensitivity of the detector also is adjustable this way. Detailed information is stated in the documentation of the electronics M-Pulse and Digital+.

Mounting
The sensing range of the sensor partially is situated above and under the opening of the detector. Big metallic pieces can already be detected in this sector. In order to guarantee the accurate functioning of the sensor, these sectors must be kept free of metal. This so called metal-free zones are divided into two types:
• Metal-free zones for movable pieces
• Metal-free zones for non-movable pieces
The dimensions of these zones are specified in the particular data sheets.

Available control units
M-Pulse
Digital+

Typical Applications
• great finish parts
• spare parts
• packages
• mill protection