---
product_id: 44413673
title: "6 Pieces Black Water Level Sensor Aquarium Tank Side Mounted Horizontal Liquid Float Switch"
brand: "anndason"
price: "€ 31.38"
currency: EUR
in_stock: true
reviews_count: 9
category: "Anndason"
url: https://www.desertcart.fi/products/44413673-6-pieces-black-water-level-sensor-aquarium-tank-side-mounted
store_origin: FI
region: Finland
---

# Max Switching Voltage 100V DC Compact 8.8cm length Operates -10°C to +85°C 6 Pieces Black Water Level Sensor Aquarium Tank Side Mounted Horizontal Liquid Float Switch

**Brand:** anndason
**Price:** € 31.38
**Availability:** ✅ In Stock

## Summary

> 💧 Stay ahead of the flow with smart, reliable water level sensing!

## Quick Answers

- **What is this?** 6 Pieces Black Water Level Sensor Aquarium Tank Side Mounted Horizontal Liquid Float Switch by anndason
- **How much does it cost?** € 31.38 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/44413673-6-pieces-black-water-level-sensor-aquarium-tank-side-mounted)

## Best For

- anndason enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Durable Build:** Robust polypropylene body and float ensure long-lasting performance in tight spaces.
- • **Arduino-Ready Integration:** Perfect for DIY smart hydroponics or aquarium projects with simple digital readout.
- • **Precision Liquid Level Detection:** Accurately senses water levels to automate your system with ease.
- • **Bulk Pack for Multi-Point Monitoring:** Six sensors included to cover multiple tanks or zones—never miss a drop.
- • **Versatile Normally Open/Closed Design:** Flip the float to switch modes, adapting seamlessly to your setup.

## Overview

This 6-piece set of black side-mounted horizontal liquid float switches offers precise water level detection with a max switching voltage of 100V DC and operating temperature range from -10°C to 85°C. Crafted from durable polypropylene, each sensor features a compact 8.8cm length and a versatile design that can be toggled between normally open and normally closed modes. Ideal for professional DIY projects, hydroponics, and aquarium automation, these sensors require low current and are best paired with relays or microcontrollers like Arduino for safe, efficient operation.

## Description

Material: Plastic Color :Black Features: 1.The float switch is a device used to sense the level of liquid within a tank. 2.The switch may actuate a pump, an indicator, an alarm, or other device. 3.It can be easily converted from normally open to normally close by invertin the float. Please Note: because the current that the switch can carry is much little(0.5A), you must use a relay or contactor when it is connected by a load, relay and contactor are not included here. Package Content : 6 x Water Level Sensor

Review: Works great - if you use it correctly - Works great with Arduino to control nutrient solution levels in hydroponic system. digitalRead(A0); returns "1" or "0." For my application, as sensor falls, a "1" is sent to the Arduino, which charges a DC-DC relay to activate normally closed solenoid valve until signal reads "0" again. I was hesitant to order after reading a lot of the reviews that insisted they go out after a short while, until I more closely examined the reviews. You cannot wire these directly between a source and a load (over about 5v) or they will predictably burn out! They are sensors, not switches, and as such must be "read" by another device that is then able to act upon it. As at least one other reviewer has noted, Arduino is a simple and safe platform for reading the signal and causing some other action based on the state of the sensor. If you need more info, Youtube it - "Arduino float switch"
Review: Floats my boat. - I used the float switch, a 5v usb power supply, and a relay to water my Chirstmas tree automatically. As a side note... sometimes aliexpress lists the breakdown voltage of float switches as their "Maximum" voltage when their actual specified operating maximum voltage is 50% of this... so you think 120V ac is safe to use with your float switch with the "maximum" voltage of 200V... and it is for 2 years... but... then, while you're sleeping, the switch gets stuck(electrically) closed and dumps 4 gallons of water under your Christmas Tree...

## Features

- Color : Black;Net Weight : 24g;Package Content : 6 x Water Level Sensor
- Max Contact Rating : 10W;Max Switching Voltage : 100V DC
- Max Switching Current : 0.5A;Max Breakdown Voltage : 220V DC;Max Carry Current : 1.0A;Max Contact Resistance : 100m Ohm
- Temperature Rating : -10 ~ +85 C;Float Ball Material : P.P;Float Body Material : P.P;Float Ball Size(Approx) : 2.35 x 1.7cm (L*D)
- Thread Dia(Approx) : 1.54cm / 0.6";Hex Head Size(Approx) : 2.5cm / 1";Body Total Length : 8.8cm / 3.5";Cable Length : 40cm / 15.8"

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B071ZG4Y34 |
| Best Sellers Rank | #57,385 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #12 in Liquid Level Sensors |
| Date First Available | May 24, 2017 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 5.3 ounces |
| Item model number | 43237-2 |
| Manufacturer | Anndason |
| Product Dimensions | 3.3 x 0.6 x 3.3 inches |

## Images

![6 Pieces Black Water Level Sensor Aquarium Tank Side Mounted Horizontal Liquid Float Switch - Image 1](https://m.media-amazon.com/images/I/817pEB1kO6L.jpg)
![6 Pieces Black Water Level Sensor Aquarium Tank Side Mounted Horizontal Liquid Float Switch - Image 2](https://m.media-amazon.com/images/I/61epBjil28L.jpg)
![6 Pieces Black Water Level Sensor Aquarium Tank Side Mounted Horizontal Liquid Float Switch - Image 3](https://m.media-amazon.com/images/I/618QgOikr2L.jpg)
![6 Pieces Black Water Level Sensor Aquarium Tank Side Mounted Horizontal Liquid Float Switch - Image 4](https://m.media-amazon.com/images/I/612cqfXCBhL.jpg)

## Questions & Answers

**Q: What is the diameter of the white-colored ring? I need to know what size hole to drill.**
A: The diameter of the threaded portion that is a part of the sensor is 16mm (<5/8"). The white soft plastic ring you refer to is 18mm diameter (<3/4"). The flange on that white plastic ring is 26mm (~1 1/8") diameter. Hope that helps.

**Q: What is the thread pitch on these?**
A: I don't know the thread. It comes with its own nut.

**Q: Does this "Switch" contain physical contacts that open and close or is it some type of transistor?**
A: This unit is an enclosed switch with two wires coming out. It can be installed to make/break contact in a fluid. I use it for water. When installed in one direction, it makes contact when full; when installed the other direction, it makes contact when empty. Thus, I have one switch at the top of a container collecting water to trigger when it is full; the other switch is at the bottom to trigger when it is empty.

**Q: Will these work under water?**
A: Yes, that is how they work. In this installation the circuit is closed until the water is high enough to open it. As the water rises the float goes up, opening the circuit. When the circuit is closed, power goes to a 12Volt solenoid that allows water from an RO/DI unit to flow into the holding tank.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great - if you use it correctly
*by C***N on February 24, 2022*

Works great with Arduino to control nutrient solution levels in hydroponic system. digitalRead(A0); returns "1" or "0." For my application, as sensor falls, a "1" is sent to the Arduino, which charges a DC-DC relay to activate normally closed solenoid valve until signal reads "0" again. I was hesitant to order after reading a lot of the reviews that insisted they go out after a short while, until I more closely examined the reviews. You cannot wire these directly between a source and a load (over about 5v) or they will predictably burn out! They are sensors, not switches, and as such must be "read" by another device that is then able to act upon it. As at least one other reviewer has noted, Arduino is a simple and safe platform for reading the signal and causing some other action based on the state of the sensor. If you need more info, Youtube it - "Arduino float switch"

### ⭐⭐⭐⭐⭐ Floats my boat.
*by S***D on December 23, 2025*

I used the float switch, a 5v usb power supply, and a relay to water my Chirstmas tree automatically. As a side note... sometimes aliexpress lists the breakdown voltage of float switches as their "Maximum" voltage when their actual specified operating maximum voltage is 50% of this... so you think 120V ac is safe to use with your float switch with the "maximum" voltage of 200V... and it is for 2 years... but... then, while you're sleeping, the switch gets stuck(electrically) closed and dumps 4 gallons of water under your Christmas Tree...

### ⭐⭐⭐⭐⭐ So far, all of them work great
*by G***3 on October 16, 2022*

Very simple reed switch. So far, all of them work great. The supply an input to a microcontroller. These are very low current switch, keepnthat in mind. If you are looking to directly use it as an inline switch, I would suggest using it to feed a MOSFET or opto-isolator. I would recommend using a SCR if it is for AC current

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-20*