FS5.A.1L.195 IST, FS5.A.1L.195 Datasheet - Page 3

• Manufacturer Part Number: FS5.A.1L.195
• Description: SENSOR, FLOW, GAS, MOLDED
• Manufacturer: IST

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

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.
10 K. With changing flow rate the bridge supply voltage U_Bs changes. The values for R1and R3 depend on the
temperature difference T and the medium which can be measured. They are delivered the customer. For air or
other gases can be taken this from following circuit suggestion. R2 should be able to be adjusted for the purpose
of the calibration about 10%. The alignment procedure depends on application.
Both circuit and the curve plotting are examples. In the concrete case of application always an individual
calibration is necessary.
Typical signal – curve between 0 .... 0.8 m/s
Option
The electric connection can be provided customer-specific.
If a connector is requested we provide e.g. the JST connector EHR-3 with 3 pins, polarized and
with a latch locking system.
Flow Sens FS5L / FS5LA
Thermal Mass Flow Sensor for
all-purpose use in Liquids
Electronic circuit recommendation CTA (Constant temperature anemometer)
7.5
6.5
5.5
4.5
3.5
8
7
6
5
4
0
0.1
0.2
0.3
Flow velocity [m/s]
0.4
0.5
0.6
0.7
0.8
MPSA05
12K
R4
1.2k
R5
Rs
Pt1200
R2
200R
R1
51
Q1
U_Bs
R3
RH
Heater
52
Flow Sensoren
FS1L oder FS5L
about
3,5V...8V
+
V4
+12V
LM2902
U1A