Ultrasonic Sensors
ISSR’s ultrasonic sensors, based on piezoelectric transducer technology, use advanced acoustic principles to accurately measure objects and distances, with strong background suppression that maintains reliability in dusty, foggy, or otherwise challenging environments. They are well‑suited for distance and presence detection, AGV obstacle avoidance (supporting obstacle detection using ultrasonic sensor), proximity switching, material detection, double‑sheet detection, edge guiding, and roll diameter control.
For liquid level applications, we provide dedicated ultrasonic level sensor solutions for ultrasonic level measurement in a water tank and other containers. These products are designed for non‑contact level monitoring. In water‑related level use cases, customers can choose an ultrasonic water sensor for tank and reservoir monitoring, or an ultrasonic sensor for water for open‑channel and process‑level measurement.
Some sensors use energy attenuation for single and double sheet detection, web correction, edge detection, and material control, ensuring reliable performance even with challenging or multilayer materials.
Output options include digital, analog, or combined interfaces. The fully integrated series supports easy “teaching” of targets and flexible switching between output modes to match different application requirements.
Ultrasonic Sensor Series
Distance Sensors
Material level detection, liquid level detection, AGV obstacle avoidance, etc.
Energy Sensors
Single and double sheet detection, edge detection and correction, object material detection, etc.
Proximity Switches
Presence detection of objects of different colors, etc.
Ultrasonic Distance Sensors
Ultrasonic distance sensors achieve non-contact distance and displacement detection by measuring the time of flight of ultrasonic echoes. They are insensitive to the color, material, surface reflectivity, and transparency of the target object. These sensors are particularly suitable for liquid and material level monitoring (including liquid surfaces, slurries, powders, and granular materials), warehouse and stacking height management, access control and barrier position control, as well as obstacle avoidance, deceleration, and docking for AGVs/AMRs.
This subcategory includes various models for liquid/material level measurement and obstacle avoidance, with measurement ranges of approximately 0.5–6 m (multiple specifications available). The sensors feature a small blind zone, millimeter-level resolution, and good repeatability. Both narrow and wide sound beams are available to accommodate long-distance measurement and short-distance obstacle avoidance, enabling reliable obstacle detection using ultrasonic sensing.
ISSR ultrasonic sensors incorporate built-in temperature compensation and adaptive gain/filtering, and support window detection, background suppression, and crosstalk immunity. Stable output is maintained even when multiple units operate simultaneously at close range. A variety of interfaces are available, including 4–20 mA / 0–10 V analog outputs, PNP/NPN switching outputs, and digital outputs (such as TTL232), as well as a detection range learning function.
Featuring a compact housing with high protection and contamination resistance (e.g., optional IP67/IP68), certain models are also available with chemically resistant surfaces, making them suitable for outdoor and corrosive environments.
Overall, this product series offers broad adaptability, helping users quickly build stable and traceable distance and level measurement solutions under a wide range of operating conditions.
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ISSR 0.15M 400kHz Ultra-high Precision Short-Form Ultrasonic Distance Sensor
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ISSR 1M 200kHz Right Angle 90-Degree Bend Fully Integrated Ultrasonic Distance Sensor
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ISSR 1M 200kHz Square Adjustable Detection Direction Ultrasonic Distance Sensor with Synchronization Function
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ISSR 3M All-in-One Ultrasonic Level Sensor | Analog/Switching/Digital
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ISSR 4M All-in-One Ultrasonic Level Distance Sensor Switch/Analog/Digital Output
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ISSR 500mm High Precision Short Range Ultrasonic Distance Sensor｜200kHz
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ISSR 6M Ultrasonic Level Sensor|Multi-Output Analog/Switching/Digital
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ISSR All-in-One 500MM Ultrasonic Sensor: Switch, Analog & Data Output
Ultrasonic Energy Sensors
Ultrasonic energy sensors reliably identify material layers, edge positions, and material types by monitoring changes in acoustic energy transmission and attenuation (rather than relying on optical contrast). They are unaffected by printed colors, patterns, gloss, and transparency.
They are widely used in printing and packaging production lines, metal/paper feed protection, and roll-to-roll processing, with rapid response supporting high-speed roll-to-roll transport and consistent quality control. This subcategory includes: dual-sheet detection sensors (to prevent simultaneous feeding of two sheets of paper), edge detection/correction sensors for roll guiding and misalignment control, and material detection sensors for distinguishing or confirming media such as films, paper, foil, nonwovens, and composites.
Many models support simple learning setup, automatic temperature/drift compensation, seamless integration with PLCs, and traceable process monitoring. Compact through-beam or reflective form factors, alignment aids, and robust housings further simplify machine retrofitting and long-term, easy-to-maintain operation.
Ultrasonic Proximity Switches
Ultrasonic proximity switches Sensor provide non-contact presence and position detection, remaining stable in various targets and environments. They excel in applications such as parts counting on conveyor belts, position confirmation at assembly stations, low/full stock indication in bins and hoppers, and open/close status feedback on doors or baffles. Because they rely on acoustic reflection rather than optical contrast, they are largely insensitive to target materials, colors, surface finishes, or transparency—generally outperforming traditional photoelectric sensors on glass, thin films, polished metals, and other complex surfaces. As a subcategory specifically designed for presence detection, these devices offer adjustable detection distance range learning, enabling rapid, application-specific setup, thereby improving field adaptability and enhancing production line reliability.
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On November 8, 2025, Chengdu Insa Sensor Technology Research Co., Ltd. held a badminton team building activity for its employees at Qingrong Lake Sports Park. The doubles pairing match was full of fun, and the post-match dinner was lively and strengthened the team.
I. Introduction Ultrasonic Sensors are widely used in industrial automation for distance measurement, level detection, material recognition, and obstacle avoidance. Although they all rely on the same fundamental principle—using high frequency sound waves to detect objects—their designs vary greatly depending on application requirements. From a selection point of view, the challenge is not simply:“Which ultrasonic…
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Frequently Asked Questions
Ultrasonic sensor is an intelligent sensor that uses high-frequency sound waves (typically above 20kHz) to achieve non-contact detection and ranging. It converts electrical signals into sound pulses through an internal piezoelectric transducer and receives the reflected echo signals, accurately calculating the distance to the target based on the time-of-flight (ToF) of the sound waves. This principle allows ultrasonic sensors to perform stable and reliable measurements in air, liquids, and even some solid media.
Compared to sensing technologies such as lasers, infrared, vision, and microwaves, ultrasonic sensors have unique advantages in environmental adaptability and versatility. They are not dependent on light and are therefore unaffected by the surface color, reflectivity, or transparency of the target object;
They maintain good measurement accuracy even in complex environments such as strong light, darkness, smoke, dust, and high humidity.
Compared to laser sensors, they are lower in cost, simpler in structure, and easier to maintain; compared to infrared sensors, they are more stable and have a wider ranging range; compared to vision sensing systems, they do not require image processing algorithms, have stronger anti-interference capabilities, and faster response speeds; and compared to microwave radar, ultrasonic sensors offer higher resolution and lower energy consumption in short-to-medium range detection.
For this reason, ultrasonic sensors are widely used in industrial automation, liquid and material level measurement and control, robot obstacle avoidance, intelligent transportation and smart homes, becoming a cost-effective ranging solution that balances accuracy, stability and economy.
Ultrasonic sensors measure distance by emitting high-frequency sound waves (typically above 20kHz) and measuring the time it takes for the sound waves to reflect back from an object. An internal piezoelectric transducer converts an electrical signal into ultrasonic pulses, which are then converted back into electrical signals upon receiving the reflected echo. By calculating the time of flight (ToF, the time difference between transmission and reception), the distance between the sensor and the target object can be accurately calculated.
Because ultrasonic sensors use sound waves, not light waves, they are unaffected by object color, surface material, or lighting conditions. They maintain stable and reliable measurement performance even in dusty, dark, humid, or complex lighting environments.
Ultrasonic sensors can be widely used in various scenarios requiring non-contact ranging and detection. Typical applications include:
– Ranging: Achieving precise distance measurement of target objects;
– Liquid/Material Level Detection: Used for height monitoring and control of liquids, powders, or solid materials in tanks, silos, or pipelines;
– Obstacle Avoidance and Collision Prevention: Applied to automatic obstacle avoidance functions in intelligent systems such as robots, AGVs, trolleys, and unmanned equipment;
– Object Detection: Identifying the presence or absence of objects on production lines or conveyor belts;
– Double Sheet Detection: Detecting double sheets or overlapping sheets in printing, packaging, and labeling processes;
– Edge Detection and Correction: Used for edge position monitoring and correction of continuous materials such as rolls, films, and paper;
– Roll Diameter Control: Real-time detection of roll diameter changes in processes such as winding, unwinding, and rewinding to achieve constant tension control;
– Material Detection: Differentiating the surface characteristics of different materials, such as differences in hardness, sound absorption, or reflectivity.
With their insensitivity to ambient light, dust, and surface color, ultrasonic sensors offer stable and reliable performance advantages in fields such as industrial automation, logistics inspection, smart devices, packaging and printing, and security systems.
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