FS5.A.1L.195 IST, FS5.A.1L.195 Datasheet

FS5.A.1L.195

Manufacturer Part Number

FS5.A.1L.195

Description

SENSOR, FLOW, GAS, MOLDED

Manufacturer

IST

Datasheet

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

Specifications of FS5.A.1L.195

Supply Voltage Range Dc

2V To 5V

Accuracy

< 3%

Flow Measuring Range

0m/s To 100m/s

Connection Size

6mm

External Diameter

6mm

External Length / Height

14mm

Lead Length

184mm

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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The Flow Sens owns for water and water mixtures optimized design consists of two temperature depending

platinum-resistors

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 ∅ 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 FS5L / FS5LA

Thermal Mass Flow Sensor for

all-purpose use in Liquids

Product

both deposited on one chip. The low-ohm resistor with a small area is used as a heater,

Easy adaptable for different applications or into housings

Simple signal processing and calibration

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

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FS5.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. Higher voltage increases self heating, a higher flow rate increases cooling ...

Page 2

... Flow Sens FS5L / FS5LA Thermal Mass Flow Sensor for all-purpose use in Liquids Technical Data Measuring principle thermal Measuring range 0 ... 10 m/s Response sensitivity 0.01m/s Accuracy < 3% current measuring value (dependent on electronic and calibration) Warm up time < 1 min (depending on mounting) Response time t < ...

Page 3

... 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 ( T) amounts the desired value between Rs and RH of e.g. ...

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