Airflow Sensor

The AWM40000 Series mass flow sensor family is based on proven microbridge technology and includes both amplified signal conditioned devices and unamplified sensor only devices.

When using the unamplified devices
(AWM42150VH and AWM42300V), the
heater control circuit in Figure 1 and the
sensing bridge supply circuit in Figure 2
are both required for operation per specification.
These two circuits are NOT on
board the sensor and must be supplied in
the application. The differential amplifier
circuitry in Figure 3 may be useful in providing
output gain and/or introducing
voltage offsets to the sensor output (Ref.
Equation 1).
The amplified devices (AWM43300V and
AWM43600V) can be used to increase
output gain and introduce voltage offsets.
The differential instrumentation amplifier
circuitry, heater control circuitry and
sensing bridge supply circuitry are all
provided onboard the amplified sensors.

FEATURES
* Manifold mount/o-ring sealed
* Ceramic flow-tube (non-outgassing), 0-1000 sccm
* Plastic flow tube, 0-6 SLPM
* High common mode pressure (150 psi ceramic flow-tube only)
* Operating temperature up to 125°C (unamplified only)
* High stability at null and full-scale