Bullet Sensors & Transducers e-Digest, Vol. 141, Issue 6, June 2012: Product News

    (ISSN 1726-5479)



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Mass Flow Sensors Establish New Performance Standards



Posifa Microsystems, Inc., a leader in Advanced MEMS Sensor Development, has unveiled its new line of Low-flow Mass Air Flow Sensors. The PMF2000 family, which incorporates the latest MEMS and microelectronics innovations, eliminates the field failures associated with pressure shock, humidity and contamination that have for years plagued other manufacturers. By replacing the common “membrane-cavity” structure with a proprietary “solid-state” thermal isolation structure on the sensor die, Posifa’s sensors bring new levels of reliability to their customer’s applications. Additionally, the sensor die incorporates a pair of thermopiles surrounding a central heating element to detect changes in temperature gradient caused by mass flow, delivering ultra-high signal-to-noise, and unsurpassed repeatability.


By using a high-caliber internal microcontroller, the PMF2000 family delivers 2 % full scale (max.) accuracy, linear output for each of their respective ranges of 10, 30, 200, 1,000 and 2,000 sccm (standard cubic centimeter per minute). This expanded set of ranges gives customers an ability to choose a range best suited to their application for improved overall performance.


The sensors are fully calibrated and compensated over the temperature range of 0°C to +50 °C.  Offering a 4 volt linear output range (1 to 5 Vdc), the sensors provide better than 2 % F.S. accuracy over the entire output range.  The new line of Sensors also offer extremely high repeatability of less than 0.5% F.S. per year null drift, making field replacements a calibration-less task.


The PMF2000 series can be found in numerous applications, including:

  • Medical respirators and ventilators

  • Patient monitoring systems

  • Anesthesia delivery machines

  • Nebulizers

  • Oxygen concentrators

  • Sleep apnea machines

  • Ventricular assistance devices

  • Environmental monitoring

  • Analytical instrumentation

  • Gas leak detection

  • Filter monitoring and VAV systems in HVAC

  • Process Control

Samples are available now and can be ordered directly from the Posifa Microsystems.


Pricing: 1,000 piece price: $45.18



About Posifa Microsystems, Inc.


Posifa Microsystems, Inc. headquartered in the heart of the Silicon Valley, provides advanced MEMS sensors, both in die and in packaged forms, to OEM customers worldwide.  The former stealth-mode company spent years developing new and innovative sensor designs while refining manufacturing technologies that improve the performance of gas and liquid sensing elements. Posifa’s efforts have resulted in the advancement of greater long-term stability and reliability of sensors, especially when applied in corrosive and caustic environments.


From design to final production, Posifa Microsystems, Inc. offers standard and custom sensor solutions for a wide variety of customers, providing cost effective, high performance sensor devices to meet their challenging design requirements.  Posifa Microsystems, Inc is a privately held company with headquarters in San Jose, Calif. For more information, please visit www.posifamicrosystems.com










Bob Frostholm

Director of Marketing

Posifa Microsystems, Inc.,

San Jose, CA, USA

Tel.: +1-650-222-6937

E-mail: bobfrostholm@posifamicrosystems.com



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