FS5.0.1L.195 IST, FS5.0.1L.195 Datasheet

FS5.0.1L.195

Manufacturer Part Number

FS5.0.1L.195

Description

SENSOR, FLOW, GAS

Manufacturer

IST

Datasheet

1.FS5.0.1L.195.pdf (3 pages)

Specifications of FS5.0.1L.195

Supply Voltage Range Dc

2V To 5V

Flow Measuring Range

0m/s To 100m/s

Connection Size

6mm

External Depth

1.5mm

External Length / Height

7mm

External Width

2.4mm

Lead Length

195mm

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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The flow Sens FS5 is successor of the proven FS1 and is characterised by a thermally more efficient sensor

structure, which exhibits with same electrical connected loads a higher chip temperature and is thus more

sensitive.

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 ∅ 6mm. This option provides

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 FS5

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

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FS5.0.1L.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 FS5 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 of a CTA (constant temperature anemometer) The two elements (heaters RH and sensor Rs) can be interconnected in accordance with following schematic in a bridge. Resistances R1, R2 and R3 are to be dimensioned correctly according sample circuit to be seen below. The bridge is balanced, if the temperature difference amounts the desired value between Rs and ...

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