Mass Air Flow Sensor for Medical Devices - PMF5000 Series

Product Specification

PMF5000 Series Mass Air Flow Sensor for Medical Devices Description：

    Posifa designed the PMF5006 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.

    PMF5006 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 PMF5006 series delivers a linearized and temperature compensated analog voltage output.

    The PMF5000 series is a proven product that has been used in quantity in FAA approved, FDA cleared, and CE certified medical devices.

 

PMF5000 Series Mass Air Flow Sensor for Medical Devices 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

• Elbow barb fittings*

• Wiring harness with pre-installed receptacle

• Flow direction can be changed (forward or backward) per customer request

• Analog or digital I2C output

• Proven in FAA approved, FDA cleared. and CE certified medical devices

* Custom fittings available

 

PMF5000 Series Mass Air Flow Sensor for 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)

• Operating Pressure: 10 psi

 

PMF5000 Series Mass Air Flow Sensor for Medical Devices Specifications：

Test Conditions: Vin=10±0.01VDC, Ta=25°C. Relative Humidity: 40%
SPECIFICATIONS	MIN	TYP	MAX	UNIT	CONDITIONS
PMF5006	0		15	SLM
PMF5007	0		20	SLM
PMF5008	0		40	SLM
PMF5009	0		60	SLM
Output Voltage (V)2	1 to 5			VDC
Null Voltage (V)	0.95	1	1.05	VDC
Output Count (D)	64 to 4031			Count
Null Count	24		104	Count
Null Drif		0.5		% F.S
Repeatability		0.2		% F.S
Accuracy3		1%		F.S.	0 to 25% F.S.
		4%		Reading	25 to 100% F.S.
Resolution (D)		12		Bit
Response Time4		5		mSec
Warm Up Time			30	mSec
Supply Voltage	6	10	16	Vdc	10V recommended
Supply Current		22		mA	at 10 VDC supply
Wetted Materials	Silicon carbide, Epoxy, Nylon (fittings), PPE+PE (main housing), FR4.

1. SLM: standard liter per minute. Standard conditions: 0 °C and 1 atmosphere.

2. V refers to the analog version of PMF5000, and D refers to the digital I2C version.

3. Maximum deviation in output from nominal over the entire calibrated flow range and temperature range. Errors include offset, full

scale span, linearity, flow hysteresis, repeatability and temperature effects over the compensated temperature range.

4. 10% to 90% rise time of the flow sensor to electrically respond to any mass flow change. May be affected by the pneumatic interface.