Air In-Line Sensors (Bubble Detectors)

Air In-Line Sensors (Bubble Detectors)

Morgan Advanced Materials' Technical Ceramics business produce ultrasonic air-in-line sensors and ultrasonic bubble detectors that offer very high reliability for the detection of air bubbles in liquid flows in medical dosing applications.

Bubble Detection

Our design expertise and manufacturing capability in this highly specialised sector allows development of high specification products to meet the tight tolerances of our medical OEM customers.

We can supply sensors and systems for applications including volumetric infusion pumps, hemodialysis machines, blood collection and component separation instruments and cardio-pulmonary bypass systems.

Our ultrasonic air-in-line sensors and ultrasonic bubble detectors can be designed to suit a variety of plastic tubing, as commonly used in medical equipment. The quality of our designs and the high performance of our piezo materials mean that bubble sizes down to four microlitres in volume or just two millimetres in diameter, can be detected.

Integrated Air-In-Line Sensors

Ultrasonic air-in-line sensors and ultrasonic bubble detectors are available on their own or complete with integrated control electronics and / or additional integrated sensors. For example, the air-in-line sensor can be combined with optical sensors to detect that the housing is correctly closed, for fail-safe operation.

Standard Air-In-Line Sensors

We have designed a standard air in line sensor to suit a variety of applications.

Air in line sensorModel No: 09168/000

This bubble detector is suitable for a 4mm tube. The housing geometry has been designed to minimize the foot print with a short flexi circuit for easy connection via a standard ZIF (Zero Insertion Force) connector (6 pin 0.5mm pitch). Upon request this sensor can be customised to suit specific requirements. The sensor can be mounted in any orientation and is designed to be dry coupled to PVC or silicon tubing.


09168/000 Technical Specification

Air in line sensor technical specification



Nominal resonant frequency 1.45MHz
Receive signal (ref. operating voltage) -30dB
3dB Bandwidth 11%
Wet/dry signal ratio 5:1*
Tubing outer diameter 4mm
Operating voltage 1 to 5Vrms
Operating temperature 0ºC to 60ºC
Storage temperature -30ºC to 80ºC
Smallest detectable bubble 0.5μL**
Casing ABS/PC Plastic

* Values determined using silicone tubing
** Dependent on electronics/software design

Electronics Sensors are usually supplied without electronics to enable electronics to be incorporated within main board of the particular medical equipment that is being manufactured by our customers. However, upon request MTC Electro Ceramics can provide a quotation for development and manufacture.


For more information, or to discuss your application with one of our engineers, contact us today.