L01 IP67 Waterproof Ultrasonic Air Bubble Detector For 3.5～4.5mm Dia Tube

DYP-L01 Ultrasonic Non-Contact Air Bubble Detector for 3.5-4.5mm OD Transfusion Tubes - Medical-Grade, IP67, Multi-Output

The DYP Sensor L01 is an ultrasonic-based, non-contact air bubble detector designed for safety-critical fluid monitoring in medical, pharmaceutical, and industrial applications. It accurately detects the presence of air, bubbles, and foam in flowing liquids within 3.5-4.5mm outer diameter transfusion tubes — without any physical contact with the liquid or tubing contents.

This sensor is built for use in infusion pumps, hemodialysis equipment, and blood-flow monitoring systems where undetected air bubbles pose serious risks. The L01 uses ultrasonic transmission to sense through the tube wall, making it compatible with virtually any tube material and any liquid colour. Detection sensitivity and response time are configurable, allowing the module to adapt to a wide range of flow conditions and alarm requirements.

The module supports three output types - TTL level, NPN open-collector, and switch output - giving developers flexibility across microcontroller and PLC-based designs. With a supply voltage range of 3.3-24V, a response time of 0.2ms, and a minimum detectable bubble volume of 10uL, the L01 meets the precision demands of modern medical-grade fluid delivery systems.

Housed in a compact ABS enclosure rated to IP67, the L01 is resistant to dust and water immersion. It can be mounted in any orientation, as ultrasonic detection is unaffected by gravity or liquid flow direction. RoHS-compliant construction makes it suitable for global regulatory environments. Remote firmware upgrade support is also included for long-term serviceability.

Key Features

• Non-Contact Detection: No physical contact with the liquid or tube interior, ensuring zero contamination of the detected medium.
• Ultrasonic Technology: Accurately identifies bubbles in most liquids regardless of fluid colour, tube material, or flow angle.
• Minimum 10uL Bubble Sensitivity: Detects bubble volumes as small as 10uL, suitable for precision medical infusion monitoring.
• 0.2ms Response Time: Near-instant detection response for time-critical alarm and shut-off applications.
• Multiple Output Interfaces: Supports TTL-level output, NPN open-collector output, and switch output for broad system compatibility.
• Wide Supply Voltage: Operates across 3.3-24V DC, compatible with both low-voltage microcontrollers and industrial control systems.
• Configurable Sensitivity and Response Time: User-adjustable detection threshold and response duration to suit specific application requirements.
• Orientation-Independent Mounting: Functions correctly in any position - liquid can flow upward, downward, or at any angle without affecting detection accuracy.
• IP67 Waterproof Rating: Protected against dust ingress and temporary water immersion, suitable for clinical and wet-environment installations.
• Compact ABS Housing: Lightweight, rigid enclosure designed for easy integration into instruments and OEM equipment.
• Remote Upgrade Support: Firmware can be updated remotely, reducing maintenance overhead in deployed systems.
• RoHS Compliant: Meets international restrictions on hazardous substances, supporting CE and related certifications.
• Tested Across Multiple Media: Verified with purified water, sterilised water, 0.9% sodium chloride, 5%-50% glucose concentrations, compound sodium chloride, 5% sodium bicarbonate, glucose-sodium chloride solutions, and 10% concentrated sodium chloride.

Applications

• Medical Infusion Pumps: Monitors IV and syringe pump fluid lines for air bubbles as small as 10uL, triggering alarms before a dangerous volume reaches the patient.
• Hemodialysis Machines: Detects air in arterial and venous extracorporeal blood circuits, supporting safety interlock systems that halt the blood pump upon bubble detection.
• Heart-Lung Bypass Systems: Monitors bubble-free flow in extracorporeal circulation circuits during cardiac surgery without any contact with the sterile blood path.
• Blood Transfusion Equipment: Ensures air-free delivery in transfusion lines and autotransfusion devices used in surgical and critical care environments.
• Enteral and Parenteral Feeding Pumps: Detects air gaps in nutrient delivery lines to maintain accurate and uninterrupted fluid infusion.
• Pharmaceutical Liquid Filling Machines: Identifies air pockets in dispensing lines to maintain dosing accuracy and batch consistency in automated drug-filling equipment.
• Laboratory and Analytical Instruments: Monitors reagent and sample flow lines in diagnostic analysers, chromatography systems, and microfluidic devices where bubble-free flow is critical to result accuracy.
• Industrial Fluid Dispensing Systems: Detects air ingress in precision fluid-delivery lines used in chemical dosing, coolant circulation, and adhesive dispensing equipment.
• Scientific Research Equipment: Suitable for peristaltic pump setups and custom flow rigs in research environments requiring controlled, bubble-free liquid transport.
• Ink and Fluid Jet Systems: Monitors fluid supply lines in continuous ink-jet and fluid-jet printing systems where air bubbles cause nozzle failures and print defects.