The FS1023-DL comprise a MEMS flow sensor mounted on a circuit board with an amplification circuit and a flow housing.

The FS1023-DL is targeted for liquid applications. The sensor utilizes thermopile sensing, which provides an excellent signal-to-noise ratio and is ideal for applications requiring low power. It is highly sensitive at low flow rates with a very fast response time.The FS1023-DL outputs a non-linear curve with flow. It features an Analog, 0 to 4.5V, and Digital I2C output.

FS1023-DL complies with NSF/ANSI 61: Drinking Water Systems Components - Health Effects. It can be safely used in water and beverage applications.


  • Measures liquid mediums
  • Robust solid isolation technology
  • Resistant to vibration and pressure shock
  • Fast response time
  • 0 to 4.5V DC output, digital I2C output
  • Supply voltage: 5V DC
  • Operating temperature range: 5°C to +75°C
  • NSF/ANSI 61 Compliant


  • Water dispensers
  • Liquid metering or switch
  • Process controls and monitoring

Product Options

Part Number Part Status Description Buy Sample
Active Liquid, 0 to 3 SLPM, non-linear digital and analog output

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
FS1023-DL Datasheet Datasheet PDF 299 KB
Sensing Technologies and Sensor Solutions Overview Overview PDF 5.75 MB
FS10xx/FS2012 High-Performance MEMS Flow Sensor Module Family Product Brief PDF 236 KB