---
product_id: 57818324
title: "FS-IR02B"
brand: "epttech"
price: "B/.48"
currency: PAB
in_stock: false
reviews_count: 11
url: https://www.desertcart.com.pa/products/57818324-fs-ir02b
store_origin: PA
region: Panama
---

# 500mm sensing range 5V DC analog output FS-IR02B

**Brand:** epttech
**Price:** B/.48
**Availability:** ❌ Out of Stock

## Summary

> 💧 Stay ahead with pinpoint liquid sensing—because every millimeter counts!

## Quick Answers

- **What is this?** FS-IR02B by epttech
- **How much does it cost?** B/.48 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/products/57818324-fs-ir02b)

## Best For

- epttech enthusiasts

## Why This Product

- Trusted epttech brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision Perfect:** Achieve ultra-accurate ±1 mm liquid level detection for flawless monitoring.
- • **Smart Integration:** Analog output at 5V DC easily interfaces with microcontrollers and relay modules for advanced automation.
- • **Durable & Reliable:** No moving parts means minimal maintenance and a solid 1-year warranty for peace of mind.
- • **Plug & Play Simplicity:** Effortless installation from any tank angle—top, bottom, or side—gets you up and running fast.
- • **Versatile Compatibility:** Works seamlessly with water and a broad spectrum of liquids, ideal for any tank size.

## Overview

The FS-IR02B is a high-sensitivity optical infrared liquid level sensor offering ±1 mm accuracy and a 500mm sensing range. Designed for easy installation on any tank surface, it supports a wide variety of liquids with a reliable 5V analog output. Its solid-state design ensures durability with no moving parts, backed by a 1-year warranty from EPTTECH’s 20+ years of liquid detection expertise.

## Description

desertcart.com: Food Grade Optical Infrared Water Liquid Level Sensor 500mm Cable High Sensibility, Working with Liquid Level Controller(Pack of 3) : Industrial & Scientific

Review: Surprisingly easy to use. - I was surprised at how effective these are and how easy they are to use with an Raspberry Pi Pico 2 W. I made a 3D printed cone to fit into a netcup space for hydroponics. When the water drops below the bottom of the netcup level the sensor triggers from wet to dry. Here is the CircuitPython code: # Minimum FS-IR02B Water Level Sensor Code import board import digitalio import time print("=== WATER LEVEL SENSOR - MINIMUM CODE ===") # Setup water level sensor on GP6 water_sensor = digitalio.DigitalInOut(board.GP6) water_sensor.direction = digitalio.Direction.INPUT water_sensor.pull = digitalio.Pull.UP print("Water level sensor ready on GP6") print("Hardware connections:") print("- VCC: Connect to 3V3 (Pin 36)") print("- GND: Connect to GND (Pin 38)") print("- Signal: Connect to GP6 (Pin 9)") print("") try: while True: # Read sensor (True = water present, False = no water) water_present = not water_sensor.value # Inverted logic if water_present: print("Water detected!") else: print("No water detected") time.sleep(1) # Check every second except KeyboardInterrupt: print("Stopped") except Exception as e: print("Error: " + str(e))
Review: Awesome! - These work great, they output 5v when fully submerged which is great to trigger relay modules if you don't want to use a microcontroller.

## Features

- They have no moving parts and are ideal for point level sensing of water and other liquids.
- Installation is simple and quick through the tank top, bottom or side.
- The sensor offers ±1 mm accuracy and broad liquid compatibility.
- They are suitable for high, low or intermediate level detection in practically any tank, large or small.
- Cable length 500mm.Input 5VDC,Analog output,XH2.5 connector
- 1 YEARS WARRANTY:EPTTECH has provided liquid detection solution for over 20 years.1 years gurranty for longterm service.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B075R6SSHJ |
| Best Sellers Rank | #221,604 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #118 in Liquid Level Sensors |
| Brand | EPTTECH |
| Customer Reviews | 4.4 4.4 out of 5 stars (60) |
| Date First Available | September 19, 2017 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 4.2 ounces |
| Item model number | EPTTECH |
| Manufacturer | EPTTECH |
| Material | Copper |
| Maximum Supply Voltage | 5 Volts (DC) |
| Measurement Accuracy | 1 mm |
| Mounting Type | Flange Mount |
| Output Type | Analog |
| Package Dimensions | 3.39 x 3.31 x 2.36 inches |
| Sensing Distance | 500 Millimeters |
| Style | Modern |
| UPC | 658126545365 |
| Upper Temperature Rating | 30 Degrees Celsius |

## Product Details

- **Brand:** EPTTECH
- **Item Weight:** 0.12 Kilograms
- **Material:** Copper
- **Maximum Supply Voltage:** 5 Volts (DC)
- **Style:** Modern

## Images

![FS-IR02B - Image 1](https://m.media-amazon.com/images/I/61JqEnDJ40L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Surprisingly easy to use.
*by J***E on August 25, 2025*

I was surprised at how effective these are and how easy they are to use with an Raspberry Pi Pico 2 W. I made a 3D printed cone to fit into a netcup space for hydroponics. When the water drops below the bottom of the netcup level the sensor triggers from wet to dry. Here is the CircuitPython code: # Minimum FS-IR02B Water Level Sensor Code import board import digitalio import time print("=== WATER LEVEL SENSOR - MINIMUM CODE ===") # Setup water level sensor on GP6 water_sensor = digitalio.DigitalInOut(board.GP6) water_sensor.direction = digitalio.Direction.INPUT water_sensor.pull = digitalio.Pull.UP print("Water level sensor ready on GP6") print("Hardware connections:") print("- VCC: Connect to 3V3 (Pin 36)") print("- GND: Connect to GND (Pin 38)") print("- Signal: Connect to GP6 (Pin 9)") print("") try: while True: # Read sensor (True = water present, False = no water) water_present = not water_sensor.value # Inverted logic if water_present: print("Water detected!") else: print("No water detected") time.sleep(1) # Check every second except KeyboardInterrupt: print("Stopped") except Exception as e: print("Error: " + str(e))

### ⭐⭐⭐⭐⭐ Awesome!
*by A***Y on October 5, 2025*

These work great, they output 5v when fully submerged which is great to trigger relay modules if you don't want to use a microcontroller.

### ⭐⭐⭐⭐⭐ Waterproof water level sensor
*by J***H on November 28, 2023*

The sensor is sealed, you don't have to worry about drilling a tank or bucket if you don't want to. You can just hot glue it on the inside of a bucket or water tank if that is what you want to do and it will be fine. *You must be certain that the type of liquid will not damage the sensor. This sensor is plastic and is NOT for solvents like gasoline or acetone!* This light based water level sensor works great. I just tried it in R/O water and it works as expected. The quality of what I've got here looks good. I am not sure what the board is supposed to be for, perhaps this also makes it a replacement for something else. On Arduino, you can just digitalRead the sensor for a HIGH or LOW value with no board or other components involved. Seems to be highly responsive to its state change. Trivial to code and implement. A great product! *For higher accuracy, use AnalogRead on the sensor (which is 5v) to get a value from around 25-1050. They read very low, under 200 or usually less when wet in R/O water and usually over 1000 out of water. I use 500 as my threshold and it works great.

## Frequently Bought Together

- Food Grade Optical Infrared Water Liquid Level Sensor 500mm Cable High Sensibility, Working with Liquid Level Controller(Pack of 3)
- AEDIKO 4pcs DC 5V Relay Module - 1 Channel Relay Switch Board with Optocoupler Isolation, High or Low Level Trigger
- ELEGOO 120pcs Multicolored Dupont Wire 40pin Male to Female, 40pin Male to Male, 40pin Female to Female Breadboard Jumper Ribbon Cables Kit Compatible with Arduino Projects

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*Product available on Desertcart Panama*
*Store origin: PA*
*Last updated: 2026-01-22*