Temperature sensor PMF5000

pressureflowmass flow

Posifa designed the PMF5000 series of mass air flow sensors specifically for portable medical devices. The sensor is fast and accurate, enabling the precise amount of gas to be delivered in a pulse mode. The sensor’s small footprint fits nicely inside a spaceconstrained housing. The stress-relieved wiring harness with pre-installed receptacle provides reliable electrical connection to the circuit board. The flow direction (forward or backward) can be customized to work with an existing system layout. PMF5000 features 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, and unsurpassed repeatability. The “solid state” thermal isolation structure on the sensor die eliminates the need for surface cavity or fragile membrane used in competing technologies, making the sensor resistant to clogging and pressure shock. The PMF5000 series includes an analog version PMF5000V and a digital version PMF5000D that supports the I2C protocol. The PMF5000 series is a proven product that has been used in quantity in FAA approved, FDA cleared, and CE certified medical devices. MAXIMUM RATINGS • Operating Temperature: -25 to 85 °C • Calibrated Temperature Range: 0 to 50 °C • Storage Temperature: -40 to 90 °C • Humidity: 0 to 100% RH, non-condensing • Shock: 100 g peak (5 drops, 3 axis) FEATURES • Unsurpassed performance in a robust and cost effective package • “Solid state” sensing core (no surface cavity or fragile membrane) resistant to clogging and pressure shock • Highly accurate