Mass Air Flow Sensor - PMF4000 Series
• Unsurpassed performance in a robust and cost effective package
• Highly accurate (4% reading typ.)
• Fast response time (5 ms typ.)
• Linear output and temperature compensation
• Long-term stability with minimal null drift
• Wiring harness with pre-installed receptacle
- Model Number: PMF4000 Series
- Data Sheet:
- Quantity:
- - +
Product Specification
PMF4000 Series Mass Air Flow Sensor Description：
PMF4000 features 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 PMF4000 series includes the analog output PMF4000V and the digital I²C output PMF4000D.
The supported max flow rates range from 12 SLM to 300 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.
PMF4000 Series Mass Air Flow Sensor 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
• Wiring harness with pre-installed receptacle
PMF4000 Series Mass Air Flow Sensor Applications：
• Oxygen concentrators
• Respirators and ventilators
• Nebulizers
• CPAP equipment
• Anesthesia delivery
• Leak detection
• Spectroscopy
• Mass flow controller
PMF4000 Series Mass Air Flow Sensor 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: 25 psi
PMF4000 Series Mass Air Flow Sensor Specifications：
Test Conditions: Vin=10±0.01VDC, Ta=25°C. Relative Humidity: 40%
SPECIFICATIONS
MIN
TYP
MAX
UNIT
CONDITIONS
PMF4003
0
12
SLM
PMF4004
0
20
SLM
PMF4005
0
35
SLM
PMF4100
0
50
SLM
PMF4101
0
100
SLM
PMF4102
0
150
SLM
PMF4103
0
200
SLM
PMF4104
0
300
SLM
PMF4105
0
250
SLM
Output Voltage (V)2
1 to 5
VDC
Null Voltage (V)
0.95
1
1.05
VDC
Output Count (D)
256 to 16124
Count
Null Count
156
356
Count
Null Drif
0.2
% F.S
Per year
Repeatability
0.1
% F.S
Accuracy3
1%
F.S.
0 to 25% F.S.
4%
Reading
25 to 100% F.S.
Resolution (D)
14
Bit
Response Time4
5
mSec
Supply Voltage (V)
6
10
16
Vdc
Supply Voltage (D)
4.75
16
Vdc
Current
21
26
mA
Wetted Materials
Silicon carbide, epoxy, PPE+PE, FR4, and silicone as static seal
1. SLM: standard liter per minute. Standard conditions: 0 °C and 1 atmosphere.
2. V refers to the analog version of PMF4000, 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.
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