Reliable Non-Contact Level & Distance Measurement
Pacific Automation supplies a full range of Microsonic ultrasonic sensors for accurate, non-contact distance and level measurement in industrial automation applications. Designed and manufactured in Germany, Microsonic sensors are known for their precision, robustness, and reliability, even in challenging environments where optical or mechanical sensors struggle.
Ultrasonic sensors operate independently of colour, transparency, surface finish, or ambient light, making them a versatile solution for a wide range of detection and measurement tasks.
Selecting the Right Ultrasonic Sensor
When selecting an ultrasonic sensor, it’s important to consider the application measurement, environment requirements, and system integration needs. The following factors will help ensure reliable performance and long-term accuracy.
Key considerations include:
Measurement range
Ensure the sensor’s operating range suits both the minimum and maximum distances required, with adequate margin for reliable detection. The detection zone should be free of other objects or machine parts to minimise interfering echoes.
Target material and surface
Ultrasonic sensors perform well on most materials, regardless of colour or transparency. However, irregular shapes, angled surfaces, or highly sound-absorbent materials can reduce signal reflection and affect measurement accuracy.
Environmental conditions
Consider temperature variations, vapour, and pressure. Ultrasonic sensors perform reliably in dusty and harsh environments, and sensors with temperature compensation and suitable IP ratings improve reliability. Specialised sensors are available for pressurised applications up to 6 bar.
Mounting space and sensor size
Compact machines or tight installations may require short-range or miniature sensor designs. The ultrasonic sensor’s detection zone should be considered during mounting.
Output and communication
Select the appropriate output type such as analogue (4–20 mA, 0–10 V), digital switching, or IO-Link for diagnostics and parameterisation.
Pacific Automation can assist with sensor selection to ensure optimal performance for your specific application.
The Right Solution for Every Application
Select the application type to read more about how Microsonic sensors are the right choice for you.
Presence detection
Sensors with a switched output, e.g., from the mic+ sensor family can be used, depending on the size of the box or container.
The mic+25/D/TC , mic+35/D/TC or mic+130/D/TC can be selected for scanning small boxes.
With larger containers you are recommended to use a mic+340/D/TC or mic+600/D/TC . If the box or container is to be scanned by several sensors, it is recommended to synchronise them with each other.
Furthermore, the pms ultrasonic sensor in hygienic design is recommended in the food industry, the pharmaceutical industry or the beverage industry.
Web edge control
The ultrasonic web edge sensors bks and edge sensor bks+ sense the edge of web-form materials which are decoiled from a spool and guided through a processing machine. The position of the edge is required in order to readjust the web run in such a fashion that the material run always remains “on track”.
The ultrasonic web edge sensors are structured as a fork sensor and work as a through-beam barrier. A transmitter is located in the lower prong of the fork, which emits continuous ultrasound.
A receiver transducer in the upper prong receives the emitted ultrasonic signal and evaluates its intensity. A web material inserted in the fork of the web edge sensor more or less covers the sound path between the transmitter and the receiver. The intensity of the receiver signal varies depending on the degree of coverage. This change is issued as an analogue signal 4-20 mA or 4–20 mA for the purpose of controlling the web run.
Double sheet control
Identifies two or more sheets of material on top of each other. The dbk+4 product range is ideal for use where paper is in use, such as sheet fed printing presses, printers, copiers or collating machines. For thicker materials, plastic sheets and coarse corrugated cardboard, the dbk+5 ultrasonic double-sheet detection is used.
Checking diameter
The diameter of a roll or coil of material can be detected by an ultrasonic sensor with analogue output and the drive adjusted or brake applied accordingly.
Through-beam barrier
Ultrasonic through-beam barriers are highly suited for reliable presence control and counting of objects at high speed. The through-beam barrier consist of a transmitter and a receiver. The transmitter emits acoustic pulses on a cyclical basis which are captured by the receiver. If an object interrupts the pulses between the transmitter and the receiver, the switching output of the receiver is set.
Label detection
The esf-1 label sensor reliably detects high-transparency, reflective materials as well as metallised labels and labels of any colour. The measurement cycle time automatically self-adjusts to the sound power required.
Level control
Detection of filling levels from just a few millimetres up to 8 m can be made. Ultrasonic sensors with one or two switched outputs for minimum/maximum control, or with 0-10 V and 4-20 mA analogue output are available. Chemical resistant versions are also available with pico+TF ultrasonic level sensor in M22 housing, crm+ ultrasonic sensors (M30 housing) or hps+ ultrasonic sensors (process connection).
Level control in 6 bar overpressure
Are possible with the hps+ sensors. In addition, the sensors are chemically resistant and available as a version with two pnp switching outputs or analogue and switching output.
Filling level monitoring in small containers
Detection of filling levels from just a few millimetres up to 8 m can be made. Ultrasonic sensors with one or two switched outputs for minimum/maximum control, or with 0-10 V and 4-20 mA analogue output are available. Even in small containers with a diameter of less than 5 mm can be measured with the zws ultrasonic sensor + SoundPipe .
The pico+TF ultrasonic sensors are the smallest chemically-resistant ultrasonic sensors available from microsonic.They cover a measurement range of 20 mm to 1.3 m.
Height and width measurements
By using several mic+ ultrasonic sensors (M30 housing), pico+ ultrasonic sensors (M18 housing) or zws ultrsonic sensors (small cubic housing), three-dimensional scanning of any size box can be made. There are sensors with different detection ranges available.
Edge detection of flat objects
Very flat objects on a conveyor belt can often be detected via an "indirect" reliable measurements: An ultrasonic sensor with switching output measures the edge of the object in an incline compared to the conveyor transport direction. The edge of the object forms a triple reflector with the conveyor belt and reflects the sound waves back to the sensor.
Quality control
on a packaging machine. A broad spectrum of ultrasonic sensors are available for the detection of objects during fast processes: the zws ultrasonic sensors in square-shaped housing, the sks sensors in miniature design, the pico+ultrasonic sensors in the M18 threaded sleeve with optional angled head and IO-Link interface, the pms ultrasonic sensor in hygienic design and the lpc+ sensor family with 2 output stages and 4 scanning distances.
Splice detection
The esp-4 splice sensor reliably detects splices and also labels. It is available both in M18 housings, as well as in M12 with external receiving transducer.
Wire break detection
during the winding/unwinding of wires. Depending on the size of the drum, a mic+130/D/TC with 1,300 mm operating range or a mic+35/D/TC with 350 mm operating range can be used. If the position of the wire on the drum should be recorded, there are ultrasonic sensors with analogue output available.
Stacking height control
Whether wooden boards, panes of glass, sheets of paper or coloured plastic panels, ultrasonic sensors are ideal for detecting the height accuracy to millimetre precision.
Monitoring of trays
A solution with the sensor operating as a two-way or reflective barrier should always be preferred when the object to be scanned absorbs the sound waves or, due to its shape or position in the tray, deflects the sound waves away. In this situation an additional reflector is positioned behind the actual object to be scanned. An ultrasonic sensor with switched output and operating in window mode emits a signal as soon as the object obscures the reflector. The lpc+ in the M18 threaded housing is ideal for this purpose.
Ultrasonic barrier
It is easy to set up a two-way or reflective barrier using an ultrasonic sensor operating in window mode. To do this, a permanent reflector is positioned behind the objects to be scanned. When an object obscures the reflector, a switching signal is generated.
Vibration feeder
Ultrasonic sensors, such as the pms sensor in Hygienic Design, continuously measure the level in the vibratory feeder. If the sensor detects a level that is too low, the feed rate is increased. Conversely, if the sensor detects a level that is too high, the control system reduces the product feed to ensure a consistent process.
Crate inspection
The mic+ ultrasonic sensors, the pico+ ultrasonic sensors and the pms ultrasonic sensor in hygienic design were specially developed for applications such as checking whether crates are filled or empty, or scanning empty plastic bottles on a conveyor belt. The synchronisation, which is integrated in both sensor families, simplifies the design of a sensor line.
Vibration feeder
Ultrasonic sensors, as the pms in hygienic design, can be used for continuously detecting the filling level of objects on a conveyor belt. When the sensor detects minimum filling level, the feed rate will be increased. On the contrary, when the sensor detects a maximum filling level, the control unit will reduce the feed rate in order to provide a smooth filling level process.
Specific solutions for specific requirements.
Need help finding the right tubing bundle? Talk to our experts today.
Distance & Position Measurement
Microsonic ultrasonic sensors provide precise distance and position measurement for automation, material handling, and production systems. Their non-contact operation ensures consistent performance without mechanical wear.
Key features:
-
Accurate non-contact distance measurement
-
Stable performance regardless of target colour or surface
-
Compact sensor designs for tight installation spaces
-
Analogue and digital output options
Typical applications:
-
Position feedback in automation systems
-
Object detection and positioning
-
Conveyor and material handling systems
Level Measurement Sensors
Microsonic ultrasonic level sensors are ideal for continuous and point level measurement of liquids and bulk solids. They provide reliable measurement without contact with the medium, reducing maintenance and improving system uptime.
Key features:
-
Continuous and point level measurement
-
Suitable for liquids, powders, and bulk solids
-
Non-contact measurement reduces fouling and wear
-
Temperature compensation for improved accuracy
Typical applications:
-
Tank and vessel level measurement
-
Silo and hopper monitoring
-
Water and wastewater systems
Compact & Short-Range Ultrasonic Sensors
Compact Microsonic ultrasonic sensors are designed for short-range detection where space is limited. Despite their small size, these sensors deliver reliable and repeatable measurement performance.
Key features:
-
Small form factor for compact machinery
-
Reliable detection at short ranges
-
Easy integration into OEM equipment
Typical applications:
-
Packaging machinery
-
Robotics and automation cells
-
Small component detection
IO-Link & Smart Ultrasonic Sensors
Microsonic offers advanced ultrasonic sensors with IO-Link and smart diagnostic capabilities, enabling seamless integration into modern Industry 4.0 environments. These sensors provide enhanced parameterisation, diagnostics, and process transparency.
Key features:
-
IO-Link communication
-
Remote parameter setting and diagnostics
-
Improved process monitoring and reliability
-
Reduced commissioning time
Typical applications:
-
Smart factories and automated production lines
-
Condition monitoring
-
Digitised process control systems
Design & Application Support
Pacific Automation provides application support and sensor selection assistance to ensure the correct Microsonic ultrasonic sensor is chosen for each application. Our team supports specification, integration, and commissioning across industrial automation projects.