Rechner Sensors IAS Serie Manual De Instrucciones página 14

General description
Typical application for inductive sensors
Our inductive sensors contain a transistor oscillator that oscillates as soon as a certain capacitance is
exceeded by approaching metals and other electrically conductive materials. The smaller the dielec-
tric constant (Ɛ ), the closer the material has to be approached. The influence is also possible through
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electrically non-conductive materials. Depending on the version, the current change of the oscillator is
amplified into an analogue output signal or output as a binary signal via a switching amplifier.
• Output stages with npn or pnp transistors are available for DC operation.
• A transistor output stage or FET-output is integrated for AC connection.
Level control by detecting the position
of the float
Mounting
Flush mounting or non-flush mounting types
There are two different types of capacitive and inductive sensors:
For flush mounting in metal and other materials.
These sensors can be mounted close together (see Fig. 1 and 3) and are specially designed
for contact-less detection of solids or liquids through non-metal containers (max. wall-thickness
4 mm).
For non-flush mounting in metal and other materials.
When mounting two or more sensors side by side:
• for capacitive sensors, an intermediate space / free zone must be provided (see Fig. 2 and
4). These sensors are designed for applications where the detecting material comes into
contact with the active area of the sensor (e.g. level monitoring of bulk materials or liquids).
• for inductive sensors, an intermediate space / free space must be provided (see figures
2 and 4). However, inductive sensors can also be installed flush in non-metals container.
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Scanning of gear wheels or cam discs