--- product_id: 113096201 title: "Taidacent Non Contact Liquid Level Sensor Contactless Water Level Sensor Externally Attached Pipe Water Float Switch NPN Output Capacitive" price: "£20.76" currency: GBP in_stock: true reviews_count: 8 url: https://www.desertcart.co.uk/products/113096201-taidacent-non-contact-liquid-level-sensor-contactless-water-level-sensor store_origin: GB region: United Kingdom --- # NPN output for precise liquid detection High-speed signal processing chip Non-contact, external pipe installation Taidacent Non Contact Liquid Level Sensor Contactless Water Level Sensor Externally Attached Pipe Water Float Switch NPN Output Capacitive **Price:** £20.76 **Availability:** ✅ In Stock ## Summary > 🚀 Elevate your liquid level monitoring—contactless, precise, and hassle-free! ## Quick Answers - **What is this?** Taidacent Non Contact Liquid Level Sensor Contactless Water Level Sensor Externally Attached Pipe Water Float Switch NPN Output Capacitive - **How much does it cost?** £20.76 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/113096201-taidacent-non-contact-liquid-level-sensor-contactless-water-level-sensor) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart NPN Output:** Instant low-level signal triggers for real-time liquid level alerts. - • **Precision Beyond Walls:** Advanced signal processing cuts through container thickness for flawless readings. - • **Universal Fit & Forget:** Works on non-metallic pipes with no batteries required—set it and forget it. - • **Zero Downtime Installation:** Clamp-on design means no container opening or production halts—effortless setup. - • **Corrosion-Proof Compatibility:** Detects toxic, acidic, and alkaline liquids safely without sensor damage. ## Overview The Taidacent Non-Contact Liquid Level Sensor uses cutting-edge signal processing to accurately detect liquid levels through non-metallic container walls without any physical contact. Designed for high-pressure, sealed environments, it supports detection of corrosive and toxic liquids with a reliable NPN output signal. Its external pipe installation ensures zero disruption to production, making it an ideal solution for modern industrial liquid monitoring. ## Description Product description Parameter Product model: XKC-Y26-NPN Supply voltage（Vin）：DC 5-12V Output mode： Switch quantity (high pulse effective) electric current： 5mA The output voltage（high pulse）： Vin; The output voltage（low pulse）： 0V; The output current： ≤100mA Response time： 500mS Working temperature： -20~85℃ Sensor sensitivity Pipe outer diameter D(mm) D≥100，Sense container wall or tube wall thickness L(mm) 20±2； Pipe outer diameter D(mm) 100>D≥80 ，Sense container wall or tube wall thickness L(mm) 15 ± 2； Pipe outer diameter D(mm) 80>D≥60，Sense container wall or tube wall thickness L(mm) 12 ±1.5；Pipe outer diameter D(mm) 60>D≥40，Sense container wall or tube wall thickness L(mm) 7 ±1.0；Pipe outer diameter 40>D≥30，Sense container wall or tube wall thickness L(mm) 5 ±1.0； Outer diameter of pipe D(mm) 30>D≥20，Sense container wall or tube wall thickness L(mm) 3 ±1.0； pipe outer diameter D(mm) 20>D≥10，Sense container wall or tube wall thickness L(mm) 1.5 ±0.5 Applicable pipe diameter range ≥10mm Liquid level accuracy ±1.5mm humidity 5%~100% Material PC V0 Fireproof material Waterproof performance IP65 Installation method Install into a flat cistern as shown in the figure above The height of the sensed liquid level is related to the sensitivity of the sensor. The higher the sensitivity, the lower the sensed liquid level Note: The liquid level is sensed in the upper and lower edges of the sensor, which is normal. The induction sheet can be tightly attached to the pipe with strong glue, or it can be tightened with the pipe with a nylon cable tie. Try to avoid metal and other parts where the probe is installed, so as not to affect the detection. Pipes made of non-metallic materials with a smooth surface, uniform thickness, tight material, and good insulation performance; such as glass pipes, plastic pipes, PC/PVC/PPR pipes, non-absorbent ceramic pipes, acrylic pipes, rubber pipes, etc. or their composites Pipes made of materials. How to install to the water pipe Install to the non-metal water pipe type as shown Sensitivity adjustment If the non-contact liquid level sensor cannot detect or the detected liquid level is too high from the Y26 sensor. The sensitivity knob can be adjusted with a small screwdriver, and there are two setting methods 1. Low sensitivity adjustment: turn counterclockwise to increase sensitivity. 2. High sensitivity adjustment: turn clockwise to lower the sensitivity Product size and physical map Y26 wiring diagram of various models NPN output drives small electric relays (coil current ≤ 100mA) working principle 1.When the black line is suspended, it is normally open output: When liquid is sensed, the transistor is turned on and closed, and the relay is energized and closed; When no liquid is sensed, the transistor will be cut off and the relay will not be closed when the power is turned off; 2.When the black wire is grounded (connected to the negative pole of the power supply 0V), it is normally closed output: When liquid is sensed, the transistor will be cut off and the relay will not be closed when the power is turned off; When no liquid is sensed, the transistor is turned on and closed, and the relay is energized and closed; Review: This sensor has an open collector output and needs a pull up resistor to work - The sensor works. I think the reason that some people can't make it work is because it has an open collector output. There is an NPN transistor inside. The collector of that transistor is connected to the signal output line. That means that the signal line needs a pull up resistor. I use a 10k resistor connected to 3.3 volts (I'm using an ESP32). However, you can connect Vcc of the sensor to 5V and still use the 10k resistor to 3.3V, or if you are using 5V logic, to 5V. If you don't use a pull up, the signal line will never go high. That's how open collector outputs work. If you are using Arduino, you may be able to set the internal pullup resistor. You do that when you set the pin you are using as an input. setup() { pinMode(pinNumber, INPUT_PULLUP); // Replace pinNumber with the desired digital pin } Review: Takes some DIY effort to use, but great sensor - This is not a plug-and-play sensor, in that you'll need to power it yourself. I knew that going in. But I've been trying to solve a problem where I can't tell the water level in my hydroponic Farmstand, and this sensor works *perfectly* for that. I *would* like to reverse the behavior of the LED, so it's on when water is not detected, not sure if that's a me problem though. I'm currently controlling it with a QT-Py from Adafruit, power from the 5v pin (though it *does* seem to work with the 3.3) and I hope with a little more tweaking of ESPHome, I'll be able to signal through Home Assistant (I'm seeing flapping through the signal pin when water is detected, but it stays off when water is not, so I'm probably reading it wrong, I don't really know what I'm doing with NPN outputs), but in these things, I often don't know what I'm doing until it either works like I see it in my head, or something catastrophically fails. But that's a me problem; this sensor is awesome. ## Features - The intelligent non-contact liquid level sensor utilizes advanced signal processing technology and a high-speed signal processing chip to overcome the impact of container wall thickness, enabling accurate non-contact liquid level detection in sealed containers. - The liquid level sensor (probe) is installed above and below the outer wall of the container to be tested (the high and low positions of the liquid level). The non-metallic container does not need to be opened, and the installation is simple and does not affect the production. - The liquid level of various toxic substances, strong acids, strong alkalis and various liquids in the high-pressure closed container can be detected. - The liquid to be tested is required to be electrically conductive, the contact surface is non-metal, and the pipe is easy to install and can be widely used. - NPN output: If there is induction, the output is low level; no induction, disconnected ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | Taidacent | | Part Number | DJL-Y26-NPN | | Item Weight | 0.81 ounces | | Package Dimensions | 3.4 x 2.1 x 0.5 inches | | Item model number | Y26-NPN | | Is Discontinued By Manufacturer | No | | Material | plastic | | Measurement System | Metric | | Batteries Included? | No | | Batteries Required? | No | ## Images ![Taidacent Non Contact Liquid Level Sensor Contactless Water Level Sensor Externally Attached Pipe Water Float Switch NPN Output Capacitive - Image 1](https://m.media-amazon.com/images/I/61YHsD34D1L.jpg) ## Questions & Answers **Q: Will this sensor sense gasoline in a plastic tank?** A: yes in a plastic tank **Q: Does the product provide continuous liquid level data?** A: According to the documentation, the device switches state when it detects liquid and then back when the liquid is gone. This is not a pulse, it is a continuous level on the yellow wire, either high or low when liquid is present, depending on how you connected the black wire. **Q: would attaching this to the underside of a sloped horizontal pipe detect the presence of water flowing in the pipe as a non-contact flow sensor?** A: From my limited testing of this sensor, I would say it would if the pipe were thin enough and the liquid filled the pipe. However, only testing will tell you for sure. **Q: I do not measure any changes in voltage in the yellow line with or without liquid present. led works as expected. what should happen?** A: Connect Black wire to nothing, Brown to +24V, Blue to 0V (Negative), Yellow to (-) side of load (100mA or less). Connect (+) side of load to +24V. Strap sensor to empty plastic pipe. Turn sensitivity screw CCW until red light ON. Then slowly CW until OFF. (keep hands away while adjusting). Now that sensitivity is at edge of sensing, bring your hand toward sensor (light turns on). Move hand away (light turns off). Put water in pipe (light turns on). ## Customer Reviews ### ⭐⭐⭐⭐⭐ This sensor has an open collector output and needs a pull up resistor to work *by M***D on April 21, 2025* The sensor works. I think the reason that some people can't make it work is because it has an open collector output. There is an NPN transistor inside. The collector of that transistor is connected to the signal output line. That means that the signal line needs a pull up resistor. I use a 10k resistor connected to 3.3 volts (I'm using an ESP32). However, you can connect Vcc of the sensor to 5V and still use the 10k resistor to 3.3V, or if you are using 5V logic, to 5V. If you don't use a pull up, the signal line will never go high. That's how open collector outputs work. If you are using Arduino, you may be able to set the internal pullup resistor. You do that when you set the pin you are using as an input. setup() { pinMode(pinNumber, INPUT_PULLUP); // Replace pinNumber with the desired digital pin } ### ⭐⭐⭐⭐⭐ Takes some DIY effort to use, but great sensor *by T***O on December 31, 2023* This is not a plug-and-play sensor, in that you'll need to power it yourself. I knew that going in. But I've been trying to solve a problem where I can't tell the water level in my hydroponic Farmstand, and this sensor works *perfectly* for that. I *would* like to reverse the behavior of the LED, so it's on when water is not detected, not sure if that's a me problem though. I'm currently controlling it with a QT-Py from Adafruit, power from the 5v pin (though it *does* seem to work with the 3.3) and I hope with a little more tweaking of ESPHome, I'll be able to signal through Home Assistant (I'm seeing flapping through the signal pin when water is detected, but it stays off when water is not, so I'm probably reading it wrong, I don't really know what I'm doing with NPN outputs), but in these things, I often don't know what I'm doing until it either works like I see it in my head, or something catastrophically fails. But that's a me problem; this sensor is awesome. ### ⭐ Intermittent work *by J***P on January 29, 2026* Does not work all the time ## Frequently Bought Together - Taidacent Non Contact Liquid Level Sensor Contactless Water Level Sensor Externally Attached Pipe Water Float Switch NPN Output Capacitive - Taidacent Non Contact Liquid Level Sensor Contactless Water Tank Water Level Sensor for Tank Water Level Control with Low and High Level Output - Taidacent Mini External Sticker Intelligent Non-contact Electronic Water Level Sensor High Low Level Output Liquid Level Sensor Switch for Water Tank Fish Tank --- ## 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.co.uk/products/113096201-taidacent-non-contact-liquid-level-sensor-contactless-water-level-sensor](https://www.desertcart.co.uk/products/113096201-taidacent-non-contact-liquid-level-sensor-contactless-water-level-sensor) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-20*