Temperature sensor PMF2000

pressureflowmass flow

PMF2000 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 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 PMF2000 series includes the analog output PMF2000V and the digital I²C output PMF2000D. The supported max flow rate ranges from 200 sccm to 10 SLM. The sensors are temperature compensated over the temperature range of 0 to 50 °C. The linearized output provides maximum flexibility and ease-of-use. APPLICATIONS • Oxygen concentrators • Nebulizers • CPAP equipment • Leak detection • Spectroscopy • Mass flow controller • Fuel cell control • Environmental monitoring 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 (4% reading typ.) • Fast response time (5 ms typ.) • Linear output and temperature compensation • Long-term stability with minimal null drift 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)