---
product_id: 171885565
title: "CQRobot Non-Contact Water/Liquid Level Sensor Compatible with Arduino, Raspberry Pi and Other Motherboards. for Industrial Production, Aquarium, Chemical Solution, Agriculture, Gardening, etc."
brand: "cqrobot"
price: "€ 40.44"
currency: EUR
in_stock: true
reviews_count: 11
category: "Cq Robot"
url: https://www.desertcart.hr/products/171885565-cqrobot-non-contact-water-liquid-level-sensor-compatible-with-arduino
store_origin: HR
region: Croatia
---

# 3.3V/5V selectable output 12mm sensing distance DIP switch logic & voltage config CQRobot Non-Contact Water/Liquid Level Sensor Compatible with Arduino, Raspberry Pi and Other Motherboards. for Industrial Production, Aquarium, Chemical Solution, Agriculture, Gardening, etc.

**Brand:** cqrobot
**Price:** € 40.44
**Availability:** ✅ In Stock

## Summary

> 💧 Stay ahead with smart, non-contact liquid sensing—because your projects deserve precision without compromise.

## Quick Answers

- **What is this?** CQRobot Non-Contact Water/Liquid Level Sensor Compatible with Arduino, Raspberry Pi and Other Motherboards. for Industrial Production, Aquarium, Chemical Solution, Agriculture, Gardening, etc. by cqrobot
- **How much does it cost?** € 40.44 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/171885565-cqrobot-non-contact-water-liquid-level-sensor-compatible-with-arduino)

## Best For

- cqrobot enthusiasts

## Why This Product

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

## Key Features

- • **Robust Signal Processing:** Advanced chip technology filters out electromagnetic interference for reliable, stable readings in complex environments.
- • **Plug & Play Compatibility:** Seamlessly integrates with Arduino, Raspberry Pi, and other microcontrollers for rapid prototyping and industrial automation.
- • **Customizable Output Voltage:** Switch between 3.3V and 5V logic levels to perfectly match your device’s power requirements.
- • **Versatile Application Scope:** Ideal for aquariums, chemical tanks, agriculture, and smart gardening—join the future of liquid level monitoring.
- • **Precision Non-Contact Sensing:** Detect liquid levels through plastic, glass, and ceramic walls up to 12mm thick—no contamination, no corrosion.

## Overview

The CQRobot Non-Contact Water/Liquid Level Sensor offers high-sensitivity, non-invasive liquid detection through non-metallic container walls up to 12mm thick. Featuring selectable 3.3V or 5V output and DIP switch-configurable logic, it integrates effortlessly with popular microcontrollers like Arduino and Raspberry Pi. Designed for industrial, agricultural, and hobbyist applications, it delivers reliable, interference-resistant detection without direct liquid contact, ensuring durability and maintenance-free operation.

## Description

CQRobot Non-Contact Water/Liquid Level Sensor Compatible with Arduino, Raspberry Pi and Other Motherboards. for Industrial Production, Aquarium, Chemical Solution, Agriculture, Gardening, etc. : desertcart.co.uk: Business, Industry & Science

Review: Worked as expected - I received this water level detector for free through desertcart Vine in exchange for an honest and unbiased review. This is a PCB with a water level sensor designed for use in embedded projects. The PCB has two switches that are not well documented: one switches the signal line between active-high and active-low, and the other allows the board to be powered at either 3.3 V or 5 V. It’s very basic — you either get a signal when water is present or you don’t. On the detection module there is a tiny adjustment screw, and after a few minor tweaks I was able to detect the water level in my plastic water jug. It won’t activate on metal, and if you touch it, it will trigger on your finger. A red LED on the detector shows when it has detected water, which is helpful during setup. Ideally, the detector pad needs to make contact with the side of whatever you are detecting. The pad is flexible and can be glued or zip-tied in place. The signal wire would typically be connected to a GPIO pin on an embedded device, but when powered at 3.3 V I found that this line only reached about 2 V. This is probably acceptable for most applications, but it should be considered when designing something that uses this detector. That said, it works well through glass or plastic and was perfect for measuring how much water is in my water butts in the garden.
Review: Very easy to set up - This water level detector works great and it is very simple to setup. It features a very basic operation of on or off. This is great for controlling the set liquid level sensing weather for pump control or water level alarm systems. I have been using this with my raspberry pi 4 using home assistant to measure my rain water collection tanks and it was very easy to setup and use. This is a great quality sensor and perfect for any project needing water level automation. And for the price it's really excellent value for money to. I highly recommended it, thanks so much.

## Features

- The CQRobot non-contact liquid level sensor realizes non-contact detection of the liquid level in a closed container. It adopts advanced signal processing technology and high-speed signal processing chip, breaking through the influence of container wall thickness. It is simple to install and easy to use, and can detect the level of various toxic substances, strong acids, strong alkalis and various liquids in high-pressure airtight containers.
- The principle is to use the inductive capacitance of water to detect whether there is liquid. When there is no liquid close to the sensor, the sensor has a certain static capacitance to the ground due to the existence of distributed capacitance on the sensor. When the liquid level slowly rises and approaches In the case of an inductor, the parasitic capacitance of the liquid will be coupled to this static capacitance, making the final capacitance value of the inductor larger.
- The changed capacitance signal is then input to the control IC for signal conversion, which converts the changed capacitance into a change of a certain electrical signal, and then a certain algorithm is used to detect and judge the degree of this change. When the change exceeds a certain amount It is considered that the liquid level has reached the sensing point when the threshold is reached.
- High stability, high sensitivity, strong interference ability, no external electromagnetic interference, special treatment for power frequency interference and common mode interference, strong compatibility, penetration of various non-metallic containers, such as plastic, glass, For ceramics and other containers, the sensing distance can reach more than 12mm; liquid, powder, and particulate matter can be detected.
- The sensor comes with 2 DIP switches, the right DIP switch controls the output voltage (high level) of the signal terminal (green line); when the DIP switch is dialed up, the high level is 5V; when the DIP switch is facing When dialing down, the high level is 3.3V. Compatible with Arduino, Raspberry Pi and Other Motherboards.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07ZMHJ6NN |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 39,611 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 38 in Liquid Level Sensors |
| Colour | Non-Contact |
| Customer Reviews | 4.5 4.5 out of 5 stars (356) |
| Date First Available | 25 Oct. 2019 |
| Item Package Quantity | 1 |
| Item Weight | 50 g |
| Item model number | CQRSENYW001 |
| Manufacturer | CQRobot |
| Material | Acrylonitrile Butadiene Styrene |
| Package Dimensions | 10.21 x 7.49 x 2.21 cm; 50 g |
| Part number | CQRSENYW001 |
| Plug profile | Surface Mount |
| Size | Liquid Level Sensor |
| Specific uses | Industrial Production, Aquarium, Chemical Solution, Agriculture, Gardening |
| Style | Non-Contact Type-1 |

## Product Details

- **Brand:** CQRobot
- **Current rating:** 50 Milliamps
- **Item weight:** 0.05 Kilograms
- **Material:** Acrylonitrile Butadiene Styrene
- **Style:** Non-Contact Type-1

## Images

![CQRobot Non-Contact Water/Liquid Level Sensor Compatible with Arduino, Raspberry Pi and Other Motherboards. for Industrial Production, Aquarium, Chemical Solution, Agriculture, Gardening, etc. - Image 1](https://m.media-amazon.com/images/I/61jpk8-rfmL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: To clarify, the theoretical dialectic capacitance of distilled water is 0.348 nF.  The air gap dialectic capacitance of the electrode is unknown?**
A: Hello! Regarding the "electrode air gap dialectical capacitance" you mentioned, it is not included in our product production technical indicators, so we are very sorry that we cannot answer this question for you.

**Q: Will it read through black plastic waist water tank on trailer**
A: Hi! It can read through the outer wall of non-metallic containers with a thickness of less than 13 mm. If the wall thickness of the black plastic waste tank on your trailer exceeds 13 mm, it is likely to be unreadable.
The following is the Wiki of this product for reference:
http://www.cqrobot.wiki/index.php/Non-Contact_Water/Liquid_Level_Sensor_SKU:_CQRSENYW001

**Q: Will this work on the outside of a curved 15 gallon hdpe water reservoir? i have some of thhe optical sensor but want to switch containers.**
A: Hello! Just make sure that its outer wall meets the requirements for use. You can refer to the following wiki for this product:
http://www.cqrobot.wiki/index.php/Non-Contact_Water/Liquid_Level_Sensor_SKU:_CQRSENYW001

**Q: Can I extend the wires? Is it better to lengthen wires between sensor cb and rPi or sensor cb and sensor?**
A: Hello! If you need to extend the wire, it is recommended to lengthen the wire between the sensor cb and RPi so that the sensing sensitivity of the sensor is not affected too much.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worked as expected
*by J***N on 11 January 2026*

I received this water level detector for free through Amazon Vine in exchange for an honest and unbiased review. This is a PCB with a water level sensor designed for use in embedded projects. The PCB has two switches that are not well documented: one switches the signal line between active-high and active-low, and the other allows the board to be powered at either 3.3 V or 5 V. It’s very basic — you either get a signal when water is present or you don’t. On the detection module there is a tiny adjustment screw, and after a few minor tweaks I was able to detect the water level in my plastic water jug. It won’t activate on metal, and if you touch it, it will trigger on your finger. A red LED on the detector shows when it has detected water, which is helpful during setup. Ideally, the detector pad needs to make contact with the side of whatever you are detecting. The pad is flexible and can be glued or zip-tied in place. The signal wire would typically be connected to a GPIO pin on an embedded device, but when powered at 3.3 V I found that this line only reached about 2 V. This is probably acceptable for most applications, but it should be considered when designing something that uses this detector. That said, it works well through glass or plastic and was perfect for measuring how much water is in my water butts in the garden.

### ⭐⭐⭐⭐⭐ Very easy to set up
*by V***I on 1 February 2026*

This water level detector works great and it is very simple to setup. It features a very basic operation of on or off. This is great for controlling the set liquid level sensing weather for pump control or water level alarm systems. I have been using this with my raspberry pi 4 using home assistant to measure my rain water collection tanks and it was very easy to setup and use. This is a great quality sensor and perfect for any project needing water level automation. And for the price it's really excellent value for money to. I highly recommended it, thanks so much.

### ⭐⭐⭐⭐ Reliable non-contact liquid detection, but expensive and lacks printed instructions
*by A***R on 12 January 2026*

💧 The box contains a single capacitive non-contact liquid level sensor with a short connector lead. The module is compact, clearly laid out, and arrives well protected. There is no printed documentation included, so I relied on the markings on the PCB and the product listing to confirm pin-out and switch positions. 💧 This sensor detects the presence of liquid at a fixed point and nothing more. It behaves like a simple on or off switch, triggering when liquid reaches the height where it is mounted. It does not report a graduated level, so monitoring multiple levels would require several sensors. In my case, I am using it to detect when a container is effectively empty, which suits this type of device well. 💧 Power and logic flexibility are handled by two small DIP switches on the board. One selects 3.3V or 5V operation, and the other inverts the output logic. I used it at 3.3V with an ESP32 without issue, and the single GPIO output keeps the wiring and code simple. Integration with ESPHome and Home Assistant was straightforward as the signal is just high or low. 💧 The sensor works on non-metallic containers such as plastic provided the wall thickness stays within the stated limits. It does not function on metal tanks. One of its main strengths is that it mounts externally and never contacts the liquid, which avoids corrosion and fouling. It is not waterproof, so outdoor use would require a protective housing, and thick garden water containers may push the limits of detection. 💧 With no moving parts, it should be suitable for continuous use, and so far it has behaved consistently. Long-term durability remains to be seen. At £15.99, it performs its job well and integrates cleanly with common microcontrollers, but for a single-point detection sensor it does feel expensive. It makes sense where non-contact sensing matters, though it is not a low-cost component. ✔️

## Frequently Bought Together

- CQRobot Non-Contact Water/Liquid Level Sensor Compatible with Arduino, Raspberry Pi and Other Motherboards. for Industrial Production, Aquarium, Chemical Solution, Agriculture, Gardening, etc.
- Arduino Uno REV3 [A000066] – ATmega328P Microcontroller, 16MHz, 14 Digital I/O Pins, 6 Analog Inputs, 32KB Flash, USB Connectivity, Compatible with Arduino IDE for DIY Projects and Prototyping
- 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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.hr/products/171885565-cqrobot-non-contact-water-liquid-level-sensor-compatible-with-arduino](https://www.desertcart.hr/products/171885565-cqrobot-non-contact-water-liquid-level-sensor-compatible-with-arduino)

---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-05-17*