Ultrasonic Sensors



New Ultrasonic Sensors

M18 Ultrasonic Cylindrical Sensors

  
 
• Up to 2,200 mm sensing distance range
• Models with digital output (single or double) or analogue output (I/V) available
• Synchronization and multiplexing functions
• Plastic or AlS1316L stainless steel housing
• Cable or M12 plug exit
• Models with radial emission
• Models with 10-LINK technology
Ultrasonic Cylindrical Sensors

M30 Ultrasonic Cylindrical Sensors

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• Up to 3,500 mm sensing distance range
• Models with digital output (single or double), analogue output (IN) or mixed output (digital + analogue) available
• Plastic or AISI316L stainless steel housing
• Cable or M12 plug output. Models with 10-LINK technology
Ultrasonic Cylindrical Sensors

M18 Short-body Ultrasonic Cylindrical Sensors

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• Up to 1,200 mm sensing distance range
• Reduced deadband
• Models with digital and analogue output (I/V)
• Plastic or AISI316L housing. Cable or M12 plug output
• Models with 10-LINK technology
Short-body Ultrasonic Cylindrical Sensors

M30 Large Front Ultrasonic Cylindrical Sensors

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• Up to 8,000 mm sensing distance range
• Models with digital (single or double), analogue or mixed (digital + analogue) output
• Plastic or AlS1316L housing. Cable or M12 plug output
• Models with 10-LINK technology
Large Front Ultrasonic Cylindrical Sensors

Cubic Through-Beam and Forks Ultrasonic Sensors

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• Models with 0- 300 mm or 0-1,100 mm sensing distance range
• Housing with reduced dimensions
• Cable exit
• Ultrasonic fork sensors for label detection on transparent surfaces
• Dynamic Teach-in system
• Width slit detection 3 mm; maximum switching frequency 1,500 Hz
Cubic Through-Beam and Forks Ultrasonic Sensors

Ultrasonic Sensor - Basic Theory

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Operation principle of Ultrasonic Sensors
Operation principle of Ultrasonic Sensors
Ultrasonic sensors are composed by: ultrasonic transducer, oscillator, trigger circuit and output circuit. There are three working principles:
• Direct Diffusion
Ultrasonic transducer is energized by high voltage pulses and starts to emit an ultrasonic signal. The ultrasonic signal is reflected by the target towards the sensor. Trigger circuit measures the time between the emission and the detection of the signal. Since the speed of the ultrasonic beam in air is known, it is easy to have not only an indication of the presence of the target, but also a measure of the distance between sensor and target. In diffuse models, the ultrasonic transducer works before as emitter and then as receiver. When it is in "emission mode" no signal can be detected. This imply that in front of the sensor there is a blind zone where the detection of objects is not possible or not reliable. The dimension of the blind zone depends on the type of ultrasonic transducer used.
Direct Diffusion

• 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 cylindrical direct diffuse & retro-reflective Ultrasonic Sensor UK1 with Teach-In button - UK1 And UKR1 Series

 
•  Models with digital programmable output
•  Models with current or voltage analogue outputs
•  Adjustable Hysteresis function: model with programmable double digital outputs, specific for levels
•  Working area adjusting (window teach or single point teach) by Teach-in button suitable for all models for a fast coming into work
•  Multifunction LED indicator: output type. adjustment procedure, NO/NC selection and reverse analog output slope
Ultrasonic Sensor

M18 cylindrical short body direct diffuse & retro-reflective Ultrasonic Sensor UK6 with Teach-In button - UK6 Series

 

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

Cylindrical Ultrasonic Sensor

M30 cylindrical direct diffuse & retro-reflective Ultrasonic Sensor with Teach-In button - UT And UTR Series

 

• 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

Cylindrical Ultrasonic Sensor

Cubic through beam ultrasonic sensors - UH Series

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

Cubic through beam ultrasonic sensors

The New Ultasonic Wave - The Limitless Series

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Ultrasonic Sensor

 
     


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