The micro-bridge air flow meter from the AWM2000 series is a passive device consisting of two Wheatstone bridges. The heating control circuit is required for operation in line with specifications. The sensor bridge supply voltage circuit is also required for operation in line with specifications. These two circuits are not integrated into the package and must be provided within the application. The differential amplifier is a useful interface for the sensor bridge. It can be used to provide output gain and introduces voltage offsets to the sensor output.
Micro-bridge air flow meters from the AWM series are not designed to detect liquid flows, and will be damaged by liquid flowing through the sensor.
• Measuring capability in both directions
• Air flow measured/actual value
• Differential low pressure sensor
Technical product data:
Signal conditioning: Not amplified (mV)
Flow/pressure range: ±200 sccm
Output voltage at the calibration point: 30.0 mV DC at 100 sccm
Connection type: Straight
Zero offset for temperature changes: ±0.20 mV DC
Output offset for changes in temperature: ±2.5% of measuring range
Flow rate change: 5.0 SLPM/s
Repeatability: ±0.35% of measuring range
Zero offset: ±1 mV DC
Response time: 1 ms typical/3 ms max.
Supply voltage: 8.0 V DC min., 10.0 V DC typical, 15.0 V DC max.
System pressure: 25 psi
Power consumption: 30 mW typical, 50 mW max.
Operating temperature: -25 - 85°C
Storage temperature: -40 - 90°C
Media compatibility: dry gas only
Sensor resistance: 5.0 kOhm
Sensor current: 0.6 mA max.
Shock: max. 10 g (5 impacts in 6 axis directions)
