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Floor Water Sensor for Flood and Leak Detection (6 ft)

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$14.99

$ 7 .99 $7.99

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About this item

  • Liquid Detection Sensor for Alarm Systems and / or Home Electronic Projects
  • 6 Feet Of Cable, 2 Mounting Screws, and Instructions
  • Compatible with Level Sense Devices
  • Perfect for Water Heater / Utility Room Leak Detection
  • Integrates Directly with Most Home Security Systems



Product Description

Level Sense LS2600 Surface Liquid Sensor connects to a control device accepting an analog or digital input.

  • Size: L64*W15.6*H12.7mm
  • Housing: ABS, white
  • Working Voltage: 5Vdc-12Vdc
  • Max. Voltage: 24Vdc
  • Max. Working Current: 0.5C
  • Temperature: 14⁰F +150⁰F / (-10℃ +65℃)
  • 6 Feet of Cable
  • Red wire to Positive, white wire to Negative (ground)
  • Perfect for Arduio, Rasberry Pi, and home electronics projects.

If you are using this in home electronics projects, please take note of the following:
 
  • This device is not providing a “contact closure” it is providing a trickle current between the two contacts when water with some ionic content is present.
  • The Leak sensor behaves as an open circuit when no water is present, and behaves as a (roughly) 1.4MΩ resistor when water is present. The resistance of it depends on your water and can vary.
  • To confirm if the device is working, place the ohmmeter probes directly into water approximately 1.5” inches apart and take a reading. Then place the sensor in water and connect the ohmmeter to the red and white wires. The two readings should be similar.
  • To get the best circuit design, put the sensor feet in water and measure the resistance with an ohmmeter. Use this resistance in your circuit design.
  • In the unlikely event you have “non-conductive” water, it can be easily rectified by sprinkling some salt around the sensor location. The water will absorb the salt, the salt will ionize the water, and allow it to conduct.
  • If you are using this sensor as an input to an Arduino or raspberry Pi, it is recommended to use either an Analog input, or a “PULL UP” input where the sensor is taking an input to ground.

Application                                                                    Red Wire Connection                                 White Wire Connection

Arduino / RP Analog Input                                           +5VDC                                                          Input, with suggested 5MΩ Pull Down Resistor


Arduino Discrete Input (pinmode=PULL UP)              Input                                                            Ground


Solid State Relay (with 3-32VDC Control Coil)            Coil -                                                           Ground
and 12-24VDC+ Power Source


Control a mechanical relay or contactor                      DC Source                                                 Transistor Base going into a “Darlington Pair”
 

The LS2600 Floor Leak Sensor

- Water Detection - Electronics Projects - Level Sense devices

Circuit Diagrams

The above circuit schematics are included with the unit and demonstrate a number of ways the unit can be deployed in various DIY home projects.


Peter
Reviewed in Canada on March 9, 2025
Good
Debby Alexander
Reviewed in the United States on August 25, 2024
When switch is open it has 2.4 Meg-Ohm resistance and when closed it has 0.4 meg-Ohm resistance. Switches typically have infinite resistance when open and
Wes C
Reviewed in the United States on June 11, 2024
I have worked in the security alarm industry for 2 decades. I wired this up to my Vista 20p panel, set the zone to NC (yes I know it's NO sensor, keep reading) with a 2k ohm resistor in parallel, which is the resistor this panel uses. With no water, the current goes through the resistor (instead of the NO sensor) and the panel is happy. When water is applied, the current takes the path of least resistance (the now closed 1.4k ohm sensor) and the panel doesn't see the 2k ohm resistor = alarm. I dropped the sensor in a bowl of water and it worked fine (this was wired directly to the panel with the supplied 6 foot of wire).Ran a wire to my final location in my 140 degree attic under my hvac, and the alarm went off immediately with no water present, and no metal touching the prongs. Measured the resistance of the wire+sensor at the panel and got nothing on my meter. Took the sensor off, checked the wire while opened and closed, no issues, the alarm acts as it should with no sensor on it.I don't know what is going on with this thing, but it's worthless if it only works at 6 feet from the alarm panel. Wasted money and time in my 140 degree attic.
Kurtis W
Reviewed in Canada on February 5, 2023
2 wire easy install. Tested out fine.Buy with confidence
rob
Reviewed in the United States on August 8, 2022
I was trying to hook it up to my home a/c system, but it is a "Normal Open" switch and I need it to be "Normal Closed"
Matthew Justis
Reviewed in the United States on July 3, 2022
I wanted to know when the drip pan in my attic air conditioner unit had water in it. I wired this sensor into the NO/NC contacts on an Avigilon IP security camera. When the pan fills with water, the sensor activated the input on the camera and sends a alert to my smartphone and sounds a buzzer I mounted to the wall. Great sensor for the price!
OldSoulMillennial
Reviewed in the United States on April 20, 2022
I hooked 3 of these sensors up to my Lorex nvr alarm inputs. When my basement floods, I’m sent notifications. I installed an 8v dc power supply directly in line with the sensor circuit. So basically when the two prongs are in contact with water, the circuit is closed and sends that 8v current into the alarm input. Works perfectly
Todd
Reviewed in the United States on August 9, 2021
I had previously asked a question through Amazon on how far I could extend the wires on this unit. The response I got was that it had only been tested up to 30 feet. I can confirm the product works fine at least up to the 50 feet of wire I used to extend it (I wasn't able to respond to my own question). I used typical CAT5e wire that I had around, bundling 4 of the 8 strands together to create 2 heavier gauge wires. Works just fine when paired with an Arduino using a digital PULL_UP pin and the onboard ground connection.
John Laferriere
Reviewed in the United States on June 29, 2020
Just received this product. Using it to automatically add water to a pool. Connected it to an 12 bit ADC. A 10M resistor divider is required. Have ran several tests including fully submerged for hours and then fully removed from water. Works perfectly. As the device dried the voltage approaches 0V. Will put into production shortly.Update: After one season, sadly the chemistry of the pool water caused the leads to erode. As a result a different sensor maybe needed for my use. This being said the sensor did perform flawless until the erosion.
Bruce
Reviewed in the United States on January 8, 2019
This is a nice water sensor for hooking it up to a controller. I used it with an Arduino to sense a drain that backs up when my washing machine drains its water. I used a relay and was able to pause the washer until the drain water recessed. The sensor detects quickly. I agree that it would be nice if the chord was longer, but its easy enough to extend it. The app notes that come with it are nice. You will have to play with the pull down resistor value you add to work with a standard TTL input pin.
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