FS1.0.1L.195 IST, FS1.0.1L.195 Datasheet

FS1.0.1L.195

Manufacturer Part Number

FS1.0.1L.195

Description

FLOW SENSOR, GAS

Manufacturer

IST

Datasheet

1.FS1.0.1L.195.pdf (3 pages)

Specifications of FS1.0.1L.195

Supply Voltage Range Dc

2V To 5V

Accuracy

Â± 3%

Flow Measuring Range

0m/s To 100m/s

Connection Size

6mm

Supply Voltage Dc Max

External Depth

1.5mm

External Length / Height

7mm

External Width

2.4mm

Lead

RoHS Compliant

Lead Length

195mm

Rohs Compliant

Yes

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The Flow sensor element consists of two temperature depending platinum-resistors, both deposited on one chip.

The low-ohm resistor with a small 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, from

0…0.1m/s up to 100m/s. The Flow Sens is also available with a plastic housing of

the user with ideal opportunities to incorporate the element into custom-built applications or specific housings, e.g.

into a T-piece.

Advantages

Applications

Flow Sens FS1

Thermal Mass Flow Sensor for

all-purpose use in Gases

Product

Easy adaptable for different applications or into housings

Simple signal processing and calibration

No mechanical moved components

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

6mm. This option provides

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FS1.0.1L.195 Summary of contents

Page 1

... The Flow sensor element consists of two temperature depending platinum-resistors, both deposited on one chip. The low-ohm resistor with a small 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 ...

Page 2

... Flow Sens FS1 Thermal Mass Flow Sensor for all-purpose use in Gases Technical Data Measuring principle thermal Measuring range 0 ... 100 m/s Response sensitivity 0.01 m/s Accuracy < 3% current measuring value (dependent on electronic and calibration) Response time t Ca. < 63% Temperature range -20 ... + 150 ° C Temperature sensitivity < ...

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 30K 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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