Sensors And Transducers #5764222

Inductive sensors are nowadays indispensable for industrial usage. As compared to mechanical switches they offer almost ideal conditions: non-contact operation free from any wear and tear, high switching frequencies and accuracy. In addition, they are insensitive to vibration, dust and moisture. Inductive sensors detect all metals without contact.

Capacitive sensors are used for the non-contact detection of any objects. In contrast to inductive sensors, which only detect metallic objects, capacitive sensors can also detect non-metallic materials. Typical applications are in the wood, paper, glass, plastic, food and chemical industries.

Ultrasonic sensors are used for reliable position detection and precise continuous distance measurement of solids, powders and liquids. They transmit and receive sound waves in the ultrasonic range. The object to be detected reflects the sound waves and the distance information is determined via time of flight measurement. The non-contact detection is independent of colour, transparency, surface characteristics or surface shine of the object. Blister packages in packaging technology or transparent plastic bowls in the food industry, for example, can be reliably detected. Even in operating conditions with heavy soiling, dust or mist the sensors detect objects reliably and without interference.

Laser systems are used where detection of small objects or precise positioning is required.
Due to the small angle of divergence long ranges of up to 60 metres can be achieved.

Fibre optics are used where mounting space for photoelectric standard sensors is confined. Advantages of these systems: The evaluation electronics and the optoelectronic components are located separately from the sensing surface of the system.
Fibre optic sensing heads can therefore be mounted in places where access is difficult.

Here you will find the first electronic fail-safe sensors which do not require a special counterpart but switch directly on the door or a stainless steel or mild steel target. They are wear-free and largely independent from mounting tolerances after a longer use of the doors.

Sensors operating to suitable measurement methods can be used to monitor gases and liquids.
A wide range of designs adapted to applications and requirements is available. All systems are designed so that the signals such as flow and temperature can be directly transferred to the control system for further processing.