Document
FS1023
Liquid Flow Sensor Module
Datasheet
The FS1023 liquid flow sensor module measures the flow rate using the thermo-transfer (calorimetric) principle.
The FS1023 offers key advantages over resistorbased flow solutions. The sensor utilizes thermopile sensing, which provides an excellent signal-to-noise ratio. The sensor comprises a “solid” thermal isolation technology with protective coating.
The non-linear flow output curve allows for sensitivity from low to full-scale flow rates. The FS1023 provides analog output.
Module Picture
Features
■ Liquid flow: 0 to 3 liters/min (with water) ■ Robust “solid” isolation technology ■ Resistant to vibration and pressure shock ■ Minimal flow resistance ■ Analog voltage output ■ Supply voltage: 5V
Applications
■ Water dispensers ■ Liquid metering or switch ■ Process controls and monitoring
R36DS0004EU0101 Rev.1.01 Sep 1, 2022
Page 1 © 2021-2022 Renesas Electronics
FS1023 Datasheet
Contents
1. Pin Information .............................................................................................................................................3 1.1 Pin Assignments ...................................................................................................................................3 1.2 Pin Descriptions....................................................................................................................................3
2. Specifications ...............................................................................................................................................4 2.1 Absolute Maximum Ratings ..................................................................................................................4 2.2 Recommended Operating Conditions...................................................................................................4 2.3 Electrical Characteristics ......................................................................................................................4
3. Typical Flow Graphs.....................................................................................................................................5 3.1 Heater Enable.......................................................................................................................................5 3.2 Electrical Connector..............................................................................................................................5 3.3 Module Material ....................................................................................................................................6 3.4 Tubing Guidance ..................................................................................................................................6
4. Package Outline Drawings...........................................................................................................................6 5. Ordering Information....................................................................................................................................6 6. Revision History ...........................................................................................................................................6
R36DS0004EU0101 Rev.1.01 Sep 1, 2022
Page 2
FS1023 Datasheet
1. Pin Information
1.1 Pin Assignments
P1 Input
Fluid Flow
P2 Output
Pin Top View
1.2 Pin Descriptions
Pin Number Pad Name
Type
Description
1
VDD
Input
Supply voltage.
2
GND
Input
Ground.
3
OUTPUT
Output
Flow analog output.
4
NC
-
Do not connect.
5
HE
Input
Heater enable, connect to +5V.
6
TEMP
Output
Thermistor analog output.
1. “NC” stands for not connected / no connection required / not bonded.
R36DS0004EU0101 Rev.1.01 Sep 1, 2022
Page 3
FS1023 Datasheet
2. Specifications
2.1 Absolute Maximum Ratings
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions can adversely impact product reliability and result in failures not covered by warranty.
Symbol VIN
TSTOR
Parameter Supply Voltage Storage Temperature
Conditions -
Minimum Maximum Unit
5
5.5
V
0
85
°C
2.2 Recommended Operating Conditions
Symbol VIN TAMB PSTAT
Parameter Supply Voltage Ambient Operating Temperature (in air) Static Pressure
Minimum 0 -
Typical 5 -
Maximum Unit
5.5
V
70
°C
30
PSI
2.3 Electrical Characteristics
Symbol IVIN FLQ
VAOUT VNULL
τH
VTEMP
Parameter Current Consumption Liquid Flow Range Analog Voltage Output Flow Null Voltage Flow Response Time [1]
Temperature Output
Conditions -
Tested with water, room temperature. Non-linear curve. No flow.
At 5°C. At 80°C.
Minimum 0 0 -
Typical 18 -
0.005 5
4.25 1.0
Maximum Unit
20
mA
3
Liter/ min
5
V
-
V
-
msec
V
-
1. The flow response time includes a 10% to 90% rise time for the flow sensor to electrically respond to any flow change. Measurements may be affected by the.