PMF82000 Mass Air Flow Sensor for Medical and Industrial Devices

The PMF82000 series combines accurate low flow measurement with fast electrical response and low pressure drop to help improve control loops and extend battery life in compact systems. The devices provide both analog and digital outputs in small, robust packages for straightforward integration into oxygen delivery, respiratory care, and other flow-measurement applications.

Designed around Posifa’s thermal flow sensing technology, the PMF82000 delivers repeatable, precise readings across the range — specified at 1 % of full scale from 0 % to 25 % FS, and 4 % of reading from 25 % to 100 % FS — while its typical flow response time is 9 ms. A low pressure drop helps minimize the burden on blowers and patient circuits. The devices operate from a 5 V supply at ~20 mA.

For easy integration, the sensor offers a 0.5 V to 4.5 V analog transfer function with a corresponding digital count map, plus I²C digital communication. Push-to-connect compatible fittings accept 6 mm OD tubing; wetted materials are nylon, FR4, and silicone. The series supports over-pressure to 30 psi, an operating temperature range of −25 °C to +65 °C, and a warm-up time of 5 s. The first product in the series, the PMF82010, provides a 10 SLM full-scale range.