TE
TECHNOLOGY
GY IIN ACT
TIION
ADVER
ADVERTORIALIAL
New sensor technology improves respiratory flow measurement
New sensor technology improves respiratory flow measurement
S
ensors are critical components for the quality and reliability of medical technology products and solutionsr In many medical devices such as ventilatorsIn many medical devices such as ventilators, anesthesia machines spirometers and oxygen concentrators air and gas flows must be monitored and controlled. n addition, he sensors have to meet strict
air and gas flows must be monitored and controlled. I In addition, t the sensors have to meet strict requirements regarding their resistance to potential contamination from humidity and infectious particlesrequirements regarding their resistance to potential contamination from humidity and infectious particles.
Differential pressure flow measurement A typical method for thetA ypical method for the
Diff atory flow is
to measure the pressure dropto measure the pressure drop across a flow element in a bypassrac oss a flow element in a bypass configuration
configuration.. To precisely measure ultra-low pressures in the range o
ultra-low pressures in the range off less than 100 Pless than 100 Pa ( (1 mbar), low- based differential pressure sensors have long been used in these applications However
based differential pressure sensors have long been used in these applications. However, theirtheir
limitations sometimes present greatlimitations sometimes present great challenges and significant development effort for design engineers Especially humidity or particles in the flow can settle in
challenges and significant development effort for design engineers. Especially humidity or particles in the flow can settle in the connecting tubes or inside thethe connecting tubes or inside the sensor and degrade the accuracy of the measurement. In a worst case scenario this can lead to a total failure of the sensor
sensor and degrade the accuracy of the measurement. In a worst case scenario this can lead to a total failure of the sensor.
precisely measure 1 mbar), f flow-
fferential pressure flowmeasurement determination of respirtde ermination of respiratory flow is
enso s are critical components for the quality and reliability of medical technology products and solutions. anesthesia machines, spirometers and oxygen concentrators,
We are ther Our inno e are there,
when re liability is of top priorit
medical devic and more efficient.
when reliabilit is of top priority.
Our innovative sensors maktive sensors make medical devices even saf and more efficient
ces even safer
LME differential pressure sensor from First Sensor LMEdiff ffe ferentialpressuresensor fromFirstSensor fr Micro-flow-based pressure sensors Micro-flow-based pressure sensors
The micro-flow-based LDE/LME differential pressure sensors from First Sensor utilize a new MEMS technology or the thermal mass flow measurement of gas through a very small flow channel, i integrated within the silicon sensor chip. This innovative sensor technology enables highly sensitive measurements of ultra-low pressures from 25 Pa ( (0.25 mbar) full scale with very high resolution and offset stability Due to the minimum gas flow through the sensor the LDE/LME series is highly immune to humidity and particles and achieves particularly long lifetimes.
he micro-flow-based LDE/LME differential pressure sensors from First Sensor utilize a new MEMS technology ffor the thermal mass flow measurement of gas through a very small flow channel, ntegrated within the silicon sensor chip pressures from 25 P
his innovative sensor technology enables highly sensitive measurements of ultra-low 0.25 mbar) full scale with very high resolution and offset stability. Due to the
minimum gas flow through the sensor, the LDE/LME series is highly immune to humidity and particles and achieves particularly long lifetimes
Micro-flow channel integrated within the silicon sensor chipegratedwithinthesiliconsensorchip Micro-fl By integrating the flow By integrating the flow
piezoresistive pressure sensors in terms of their immunity to humidity and particles Further the calibration of the sensor is not affected by long connecting tubes or filters since the overthe sensor is not affected by long connecting tubes or filters since the overall fall flow resistance in the bypasslow resistance in the bypass line is determined almost exclusively by the micro-flow channel within the sensor chipline is determined almost exclusively by the micro-flow channel within the sensor chip.
measurement (max. 120-180 µl/min) - in some applications up to 1,000 times less than conventional flow- based pressure sensors. The LDE/LME ulte LDE/LME ultrra-a-low pressure sensors nearly behave liklow pressure sensors nearly behave like membr membrane-based piezoresistive pressure sensors in terms of their immunity to humidity and particles. Further, the calibration of
herefore the sensors need only tiny amounts of flow in the bypass for a pressure ne-based
First Sensor develops and manufactures highly reliable sensors and customized sensor systems as a strategic partner to medical product manufacturers and is certified according to EN ISO 13485.
First Sensor develops and manufactures highly reliable sensors and customized sensor systems as a strategic partner to medical product manufacturers and is certified according to EN ISO 13485.
channel at the chip level, the LDE/LME differential pressure sensors achieve very high pneumatic resistances of up to >100 kPa/(ml/s). Therefore, the sensors need only tiny amounts of flow in the bypass for a pressure measurement (max. 120-180 µl/min) - in some applications up to 1,000 times less than conventional flow- based pressure sensors
channel at the chip level, the LDE/LME differential pressure sensors achieve very high pneumatic resistances of up to >100 kPa/(ml/s).
flowchannel integ
First Sensor Technics LtdTechnics Ltd 01788 560426 01788 561228
First Sensor Te 01788 560426 01788 561228
uk@first-sensor.com /INSTRUMENTI/NSTRUMENTAT TA ION ATION
uk@first-sensor.com www.first-sensor.com
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