New PMF8300 Series Mass Air Flow Sensors

The News

Posifa Technologies announces its new PMF8300 series of mass air flow sensors for use in respiratory care and other medical and instrumentation applications. Compared to the company’s previous-generations solutions, PMF8300 series devices offer improved accuracy, repeatability, and signal-to-noise performance — all at a lower cost.

Target Applications:
Air flow volume control in:
  • Ventilators
  • Respirators
  • Oxygen concentrators
  • Nebulizers
  • CPAP equipment
Mass flow measurement in:
  • Spectroscopy equipment
  • Environmental monitoring equipment
Key Specifications and Benefits:
  • Solid-state thermal isolation structure
  • Eliminates the need for a surface cavity or fragile membrane
  • Feature Posifa’s third-generation thermal flow die
  • Measure flow rates from 15 SLM (PMF8315) to 100 SLM (PFM8399)
  • Extremely fast response times of 5 ms typical
  • Excellent signal-to-noise performance
  • Repeatability of 0.5 % F.S.
  • Compact, robust packaging
  • Provide both analog (voltage) and digital I2C outputs in the same package
  • Can be customized with bidirectional flow sensing
  • Operating temperature range of -40 °C to +85 °C
The Context

By providing the PMF8300 series at a lower price point, Posifa is offering a cost-effective upgrade path for new equipment designs, while maintaining a supply of previous-generation solutions like the PMF4000, PMF2000, PMFc720, and PMFc40000 series for existing products. Furthermore, due to the devices’ simplified design, Posifa can scale up production of the PMF8300 series rapidly in response to sudden surges in demand.

The mass air flow sensors feature Posifa’s third-generation thermal flow die, benefiting from the latest innovations in microfabrication. The sensor die uses a pair of thermopiles to detect changes in temperature gradient caused by mass flow, delivering excellent signal-to-noise performance and repeatability. The “solid state” thermal isolation structure eliminates the need for the surface cavity or fragile membrane used in competing technologies. The sensor die, with its silicon carbide protective film, is robust against water condensation, while allowing the highest level of sensitivity and minimizing the cost of packaging.


Samples and production quantities of the PMF8300 mass air flow sensors are available now.   

Download PMF8300 Datasheet