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LMES025U Datasheet(PDF) 12 Page - Sensortechnics GmbH

Part No. LMES025U
Description  digital low differential pressure sensors
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Maker  SENSORTECHNICS [Sensortechnics GmbH]
Homepage  http://www.sensortechnics.com
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LMES025U Datasheet(HTML) 12 Page - Sensortechnics GmbH

 
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E / 11822 / C
LME series – digital low differential pressure sensors
Page 12/12
Subject to change without notice
www.first-sensor.com
contact@first-sensor.com
Ordering information
Gas mixture change (purge time)
The LME series pressure sensors feature minimized internal volume, which allows for fast response to gas mixture change and high pneumatic
impedance at the same time. Purge time (T
P) can be estimated by the following equation:
T
P
= Purge time [s]
V
INT =
Internal volume of the LME sensor [ml]
T
P =
V
INT
=
V
INT
F
Norm
P
Norm/ZP
F
Nom =
Nominal flow [ml/s]
P
Nom =
Nominal pressure [Pa]
Z
P
= Pneumatic impedance [kPa/(ml/s)]
The typical internal volume of the LME sensor (V
INT) is 0.04 ml. With a pneumatic impedance (ZP) of 15 kPa/(ml/s) and a nominal pressure (PNom)
of 250 Pa, the estimated purge time (T
P) is 2.4 seconds.
Series
Pressure range
Calibration
Housing
Output
Grade
LME
S025
25 Pa (0.1 inH
2O)
B
Bidirectional
B [SMD, 2 ports, axial, same side]
6 [Non-ratiometric, 5 V supply]
S [High]
S050
50 Pa (0.2 inH
2O)
U
Unidirectional
S100
100 Pa (0.4 inH
2O)
S250
250 Pa (1 inH
2O)
S500
500 Pa (2 inH
2O)
Custom adaptor
The LME series pressure sensors can optionally be equipped with a custom adaptor for your application-specific mounting requirements. Please
contact First Sensor for more information.
Fig. 7: 3D views of a custom adaptor for the LME pressure sensor


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