Bullet Sensors & Transducers e-Digest, Vol. 104, Issue 5, May 2009: Product News

    (ISSN 1726-5479)

 

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Microbridge Technologies Announces Micro-Flow Differential Pressure Sensors for Medical Respiration and Industrial HVAC Applications

 

 Sensors Expo & Conference, Chicago, Ill, June 8, 2009– Microbridge Technologies, Inc., the leader in passive, analog precision calibration products (Rejustors), has announced a family of Nano-Air-Flow Differential Pressure Sensors targeted at medical respiratory and industrial HVAC applications.  Microbridge is demonstrating the capabilities of these sensors at The Sensors Expo, June 8 – 10.

 

The new devices incorporate a thermal anemometer element and CMOS Analog conditioning circuitry with a micro-flow channel having very high flow-impedance that allows accurate sensing of low differential pressures over a wide dynamic range. The flow-impedance is pre-defined at the die-level, requiring only 2.5nl/sec of air flow and thus dramatically relaxing demands on subsequent packaging operations, resulting in a smaller, lower-cost solution.

 

“We are faced with an aging population and with it a growing need for access to affordable and top medical care,” said Bob Vaupshas, president & CEO at Microbridge. “ Respiration equipment, spirometers and sleep apnea apparatus are just some of the medical tools needed to address this longer life span. Our technology makes it less expensive and enables better performance than current solutions.”

 

Microbridge’s approach allows the sensor to be constructed with flow impedances of up to several hundred thousand Pascals, more than 1,000 times greater that other competing technologies. Key advantages of this nano-air-flow approach are the virtual elimination of leakages, greatly reduced susceptibility to poor filtration, a smaller footprint (often less than 50% of alternative solutions) and the enablement of very low cost package options. Additionally, the Microbridge approach facilitates the use of long hoses, dissimilar diameters, with or without filtration, with no impact to calibration. These Sensors are an ideal solution in medical respiration applications where it is necessary to measure full-scale differential pressures of approximately 15” H2O, with a greater than 104 dynamic range, and with extreme resistance to contamination.

 

The CMOS die itself consists of the sensor element, amplification and analog adjustability through the use of rejustors, enabling near zero TC-Span without digital compensation. Sensitivity is less than 0.1 Pascal, (0.004 inches of H2O) the lowest in the industry and ideal for detecting small changes in air flow for respiration and ventilation in medical applications; heating and cooling in industrial HVAC environments; and intrusion detection in secured environments.

 

Available directly from Microbridge, the MB-LPS-01 (for industrial/HVAC) and the MB-LPS2-01 (for medical/respiration) are priced below $10 in high volume. For sales enquiries, contact Microbridge at sales@mbridgetech.com

 

 

Contact:

 

Sacha Arts

Bella Vista Communications

Tel.: 408-356-3099

E-mail: s.arts@comcast.net

Http://www.mbridgetech.com

Nano-Air-Flow Differential Pressure Sensors

 

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