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Thick-film Gas Flow Sensor - XEN-GFL9722

? Solid State reliability
? Low cost, small size
? Long-term stability (parts of a percent)
? Interchangeability (0.5%)
? Protective polymer coating
? Custom designs on request
? Operating temperature: -40 to + 70 °C

Model Number: XEN-GFL9722
Data Sheet:

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Product Specification

XEN-GFL9722 Gas Flow Sensor Description
The Gas Flow Sensor XEN-GFL9722 is a ceramic based thermal sensor. It consists of two thick-film heating resistors and a thick-film temperature sensor. Both temperature sensor and heating resistors are laser trimmed which provides a true sensor-to-sensor interchangeability. The sensitive parts of the sensor are coated with a black polymer, which protects them from harsh environments like aggressive solvents, corrosive gasses and aggressive vapors.

When the XEN-GFL9722 is heated by the heating resistors, a gas flow passing the sensor will cool it. Because of this the output resistance will change. External temperature effects can be compensated using a second, not-heated, sensor connected in a Wheatstone bridge configuration.

XEN-GFL9722 Gas Flow Sensor Features
? Solid State reliability
? Low cost, small size
? Long-term stability (parts of a percent)
? Interchangeability (0.5%)
? Protective polymer coating
? Custom designs on request

XEN-GFL9722 Gas Flow Sensor Applications
? Flow detection
? Gas-flow measurements
? Flow control
? Absolute temperature measurement
? Fluid detection

XEN-GFL9722 Gas Flow Sensor Specifications
(in air, ambient temperature 20°C, 1 Atm.)

Parameter	typ	units	notes
Dimensions	7.5 x 7.5	mm
Operating temperature	-40 to + 70	°C
Storage temperature	-50 to + 170	°C
Heating resistor	50 ± 1	Ω
Typical heating voltage	7	V
Max. heating voltage	9	V
Temperature sensor	2000 ± 10	Ω
Stability	< 0.5	%
Sensitivity	5.5 ± 0.5	/ °C
TCR	2750	ppm/ °C
Time constant	3	sec.	depending on flow and mounting