Flow detector BG series

air bubblebubbleultrasonic

Overview
The BG series ultrasonic bubble sensors are dry‑coupled, non‑invasive detectors for accurate detection of air bubbles and gas‑liquid two‑phase states in flexible tubing. The sensors use ultrasonic pulse technology and MCU‑based parameter configuration to adjust response speed, delay and sensitivity for applications in medical devices, bioprocessing, industrial automation, food & beverage and fluid handling systems.

The BG series bubble sensor can detect bubbles >1/3 of the tubing ID(inner-diameter)The BG series bubble sensor can detect bubbles >1/3 of the tubing ID(inner-diameter)

Applications

• Medical equipment: hemodialysis machines, ventricular assist devices, organ perfusion systems, heart‑lung machines, blood pumps.
• Biopharmaceuticals: single‑use reactors, fermenters, cell culture systems, vaccine production lines, tangential flow filtration, liquid chromatograph lines.
• Food & beverage: milk, juices, brewing lines, dosing and filling equipment.
• Industrial automation: filling machines, coating/spraying systems, cooling and lubrication circuits, water & wastewater treatment.
• Laboratory and research fluid monitoring.

Product Features

• Dry coupling: non‑invasive measurement without coupling agents; tubing pressed into the sensor groove for close contact.
• Adjustable response: MCU software parameters allow tuning of response speed, delay and sensitivity.
• Color‑independent detection: performance unaffected by tubing or liquid color.
• Multiple tubing sizes: standard models to fit a range of outer diameters; OEM and customization supported.
• Multi‑output modes: supports integration with automation control systems.
• Compact integrated housing: sensor electronics built into ABS housing.

Product selection

• BG013N — Compatible tubing OD: 1/8 in (3.2 mm); ID: 1/16 in (1.6 mm)
• BG016N — Compatible tubing OD: 5/32 in (4.0 mm); ID: 1/16 in (1.6 mm)
• BG019N — Compatible tubing OD: 3/16 in (4.8 mm); ID: 1/16 in (1.6 mm)
• BG025N — Compatible tubing OD: 1/4 in (6.4 mm); ID: 1/8 in (3.2 mm)
• BG031N — Compatible tubing OD: 5/16 in (7.9 mm); ID: 3/16 in (4.8 mm)
• BG038N — Compatible tubing OD: 3/8 in (9.5 mm); ID: 1/4 in (6.4 mm)
• BG050N — Compatible tubing OD: 1/2 in (12.7 mm); ID: 3/8 in (9.5 mm)
• BG056N — Compatible tubing OD: 9/16 in (14.3 mm); ID: 3/8 in (9.5 mm)
• BG075N — Compatible tubing OD: 3/4 in (19.0 mm); ID: 1/2 in (12.7 mm)

Technical specifications

• Detectable fluids: water, blood, saline, beverages, fuels, paints and other acoustically transparent liquids.
• Tubing materials: PVC, silicone, PE, PUR, etc.; smooth inner/outer surfaces, no fiber or metal braid. Recommended wall thickness 10–20% of OD. Ensure tubing is pressed to the bottom of the sensor groove for proper contact.
• Housing material: ABS plastic.
• Input voltage: 5–30 VDC.
• Current consumption: < 50 mA.
• Working temperature: 0°C to 60°C; storage temperature: -20°C to 70°C.
• Relative humidity: 30%–90% (no condensation). Atmospheric environment: no corrosive gases.
• Self test: optional function; when external 0V is applied to the Self Test pin the sensor reports gas detected and LED indicates status.
• Output: TTL compatible signal.

Summary

• Detection method: ultrasonic pulse, dry‑coupled, non‑invasive.
• Configurable sensitivity and timing via MCU software for precise integration into process lines.
• Suitable industries: medical, biopharma, food & beverage, new energy, industrial automation.
• Wide model range covering tubing OD from 1/8 in to 3/4 in; customization available.