Ultrasonic Sensors

• Retroreflection
To work correctly, it is necessary a background/reflector (any flat, orthogonal, fixed part). The sensor measures the distance between sensor and reflector. Any changes in this measure means that there is an object between sensor and reflector. In this case we don't have a blind zone, but we have A consider a minimum sensing distance between sensor and reflector: the object can be detected in the whole working area.

• Emitter and receiver
There are two separate units: emitter and receiver. The receiver detects the signal from the emitter. If there is no signal, this means that there is an object between emitter and receiver.

Considerations on argets tipology
Ultrasonic sensor can detect any kind of targets (more or less). The effective detection distance depends on: target dimensions (more the target is big, more ultra-sonic signal is reflected, higher the sensing distance that it is possible A reach), materials (compact targets, as metal, wood, liquids, reflect a At of the ultrasonic signal - low density materials, as powders, foams, absorb the majority of the ultrasonic beam). Sound absorbing materials can be detected only at very low distance.

In the direct diffuse sensors, other factors have to be considered:
• Shape Of The Object
If the objects are perpendicular to the ultrasonic beam, the beam is reflected towards the sensor, and so the object is well detected. Objects with irregular or tilted shape, scatters the beam, so it is possible that they would not be detected.

Object Temperature
Even if MD sensors are fully thermically compensated in the whole sensing range, a high thermal gradient between object and environment, can create turbulent air whirpool that can distort the ultrasonic beam. All the measures indicate in the catalogue are releted to the standard target according EN60947-5-2. Users have to take care of the possible differences with real target used.

Switching Frequency
Switching frequency is the maximum output switching frequency performed by the output circuit when standard targets cross the sensing field. It is depending on: sensor's characteristics, target dimensions and size, distance from the targets.

Hysteresis
Hysteresis is the difference between switch on and switch off position. It is necessary to avoid output oscillations if the target is vibrating or fixed close to the switching Point

• M18 diffuse sensors with short housing
• Digital output
• Analogue output

• M30 ultrasonic sensor with standard housing and with large front with high performances and high sensing distances
• Adjustable hysteresis function: models with double digital programmable output specific for level detection
• Models with voltage or current output: programmable slope to optimize resolution
•  Adjustable working area (window mode or object mode) by Teach-in button on all models for a quick and easy installation
•  Two multifunction LEDs: orange LED for adjustment procedure and output type and green LED for target alignment
•  Plastic and AISI 316L stainless steel housing. plug M12 or cable exit 4 pin

• Total protection against any of electric damages
• Plastic housing
• IP67 protection degree
• Approval: CE