FS1L.A.1L.195 IST, FS1L.A.1L.195 Datasheet

FLOW SENSOR, FLUIDS, MOULDED

FS1L.A.1L.195

Manufacturer Part Number
FS1L.A.1L.195
Description
FLOW SENSOR, FLUIDS, MOULDED
Manufacturer
IST
Datasheet

Specifications of FS1L.A.1L.195

Supply Voltage Range Dc
0V To 10V
Accuracy
± 3%
Flow Measuring Range
0.01m/s To 10m/s
Connection Size
6mm
Supply Voltage Dc Max
10V
External Diameter
6mm
External Length / Height
14mm
Lead
RoHS Compliant
Lead Length
176mm
Measuring Range
0.01
Rohs Compliant
Yes
The Flow Sens is the result of continuous development of IST AG quality products.
that is optimised for measurements in dielectric liquids like oil or pure water. It consists of two
temperature depending platinum-resistors, both deposited on
area is used as a heater, whereas the other high-ohm resistor serves to measure the reference temperature.
Using a bridge circuit, the differing resistance value of two elements leads to different (self) heating. The (self)
heating is dependent upon the applied voltage, the mass flow, and the media in which the sensor is located.
Higher voltage increases self heating, a higher flow rate increases cooling. If the self heating is kept constantly by
a suitable controller, the voltage increases with higher flow rates and therefore becomes a measure for the mass
flow. As a result of his little thermal mass, this sensor has fast heating and cooling response times. The
measuring principle of the sensor can be used for large operation ranges. The Flow Sens is also available with a
plastic housing of
custom-built applications or specific housings, e.g. into a T-piece.
Advantages
Applications
Flow Sens FS1L / FS1LA
Thermal Mass Flow Sensor for
all-purpose use in Liquids
Product
6mm. This option provides the user with ideal opportunities to incorporate the element into
Easy adaptable for different applications or into housings
Simple signal processing and calibration
Insensitive to contamination
No moving parts
Excellent reproducibility
Excellent long -term stability
Best price-performance ratio
HVAC and building control solutions
Automotive industry
Medical devices
Device monitoring
Cooling devices
Food industry
one chip. The low-ohm resistor with a small
The layout of the Sensor

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FS1L.A.1L.195 Summary of contents

Page 1

... Using a bridge circuit, the differing resistance value of two elements leads to different (self) heating. The (self) heating is dependent upon the applied voltage, the mass flow, and the media in which the sensor is located. ...

Page 2

... Required Voltages typical Dielectric strength Substrate material Al2O3 ceramic In general All data are temporary and valid in pure water. Other media and higher requirements upon request. No responsibility accepted. Construction size FS1L.0.1L.195 2 FS1L.A.1L.195 (0° (0° 1200 heater rating ! dependent on flow) 195 mm 3 ...

Page 3

... Electronic circuit recommendation As shown on the scheme to the right, the heater R sensor R need to be connected in a bridge circuit essential to determine the correct values of the resistors R1, R2, and R3. The bridge is in balance as soon as the desired temperature difference between R and R S 10K changing flow the bridge voltage U_Bs needs to be controlled in dependence of the bridge balance V1-V2. The values for R1… ...

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