Fingerprint Sensor AS608 - A Beginner's Guide
One touch can replace keys. This project uses an optical fingerprint sensor to enroll users and then grant access with a quick scan.
read tutorial →
Add Reliable Liquid Level Sensor Analog (FS-IR02) Gravity Sensing to Your Next Build
Liquid Level Sensor Analog (FS-IR02) Gravity Gravity FS-IR02 Liquid Level Sensor uses a photoelectric design to detect liquid presence with no mechanical float. That helps reduce wear and makes it useful in compact tanks and fluid systems.
It is a good fit for refill alerts, leak prevention, and liquid level trigger projects.
Important: Use the official DFRobot links below for wiring, sample code, downloads, and the latest setup notes for this SKU.
Why you'll love it
- No moving float: Less wear than many float-based sensors
- Simple digital-style level output: Easy to use in automation projects
- Wide working temperature: Suitable for many fluid control builds
- Compact body: Fits into tighter systems
- Gravity wiring: Fast controller connection
- Gravity-ready: Easy plug-and-play wiring for fast setup
What you can build
This part fits monitoring, measurement, logging, alarms, and automation builds. It works well in Arduino, ESP32, and Raspberry Pi style projects where you need reliable real-world data from the liquid level sensor analog (fs-ir02) gravity.
Starter bundles
Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus sensor cables, headers, or a matching expansion shield for faster setup.
Recommended add-ons
Useful add-ons include displays, data logging modules, waterproof enclosures, and matching Gravity cables or sensor shields.
Technical specifications
| Product | Liquid Level Sensor Analog (FS-IR02) Gravity |
|---|---|
| SKU | SEN0205 |
| Brand | DFRobot |
| Interface | Analog, Digital |
| No moving float | Less wear than many float-based sensors |
| Simple digital-style level output | Easy to use in automation projects |
| Wide working temperature | Suitable for many fluid control builds |
| Compact body | Fits into tighter systems |
| Gravity wiring | Fast controller connection |
| Operating voltage | 5V |
Pinout & usage notes
For analog readings, use a stable reference and keep wiring short when possible for cleaner signals. If you are using Gravity connectors, align the plug correctly and avoid forcing the cable into the wrong header. Use a suitable external power source for motion parts when the controller alone cannot supply enough current.
DFRobot resources
Official product page: View on DFRobot
Wiki / documentation: Open DFRobot wiki
What’s in the box
1 × Liquid Level Sensor Analog (FS-IR02) Gravity
Frequently Asked Questions
Can I use this for logging or monitoring projects? Yes. It is a good fit for data collection, automation, and alert-based builds when paired with a supported controller.
Does it work with other boards too? Often yes, as long as voltage, interface, and pin mapping match. ESP32 and Raspberry Pi users should still check the official docs first.
Where can I find wiring and examples? Use the official DFRobot product page and wiki links below for guides, downloads, and code examples.
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
Compatibility & downloads
// downloads
- Schematic pdf
Customers also bought
Build with this board
Thumb Joystick - A Beginner's Guide
Wire a joystick to your Arduino, read X/Y, then print UP / DOWN / LEFT / RIGHT to the serial monitor.
read tutorial →Motor Drive (BTS7960 43A) - A Beginner's Guide
Bench-test a 43 A motor driver before wiring the full project. Catches weak power, mis-pinning, and dead boards before they cost you time.
read tutorial →Raspberry Pi Pico (RP2040) - A Beginner's Guide
Coming from UNO and the Pico won't show a COM port? Here's the BOOTSEL trick, the driver fix, and the first sketch that actually works.
read tutorial →Notes from the bench
Ask the community
Project Showcase — show what you built
Share what you built. Photos, BOM, what worked, what didn't.
view thread →How to ask a good question (and actually get answers)
Symptom + what you tried + clear photo = answers within hours.
view thread →ESP32 brownout when wiring a sensor — fixes that worked
Brownout reset when adding a sensor? Notes on supply decoupling and GPIO checks.
view thread →First Arduino — sketch upload error, what to try?
Upload failing on your first Uno? Driver, COM port, board match — checklist inside.
view thread →