> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# Capacitive Pipeline Liquid Level Sensor

**Type:** Product page · **SKU:** SEN0509 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/capacitive-pipeline-liquid-level-sensor.html ([markdown](https://core-electronics.com.au/capacitive-pipeline-liquid-level-sensor.html.md))

This capacitive pipeline liquid level sensor of high sensitivity is suitable for non-metallic pipes with a diameter of 6mm. The sensor outputs digital...

## Pricing

- **Price:** $16.80 (inc GST) — $15.27 AUD, exc GST
- **Quantity discounts:** 6+ $14.51 (exc GST) · 12+ $13.90 (exc GST)

## Availability & dispatch

- Out of stock — the product page offers email notification when it returns.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SEN0509:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
- **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/SEN0509:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.)
- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

###  Introduction

This capacitive pipeline liquid level sensor of high sensitivity is suitable for non-metallic pipes with a diameter of 6mm. The sensor outputs digital high/low level(low when liquid detected) and adopts 3-pin DuPont connector, **which can be widely used in beverage machines, small water pipe level detection, and infusion pipe level detection scenarios.**

**Working Principle**

The liquid level sensor uses the sensing capacitance of water to detect the presence of liquid. When there is no liquid approaching the sensor, the sensor has a certain static capacitance due to the distributed capacitance. When the liquid level slowly rises close to the inductor, the parasitic capacitance of the liquid will be coupled to the static capacitor, causing the final capacitance of the inductor to become larger. The changed capacitance signal is then input to the control IC for signal conversion, which will change. The capacitance is converted into the amount of change of an electrical signal, and then a certain algorithm detects and judges the degree of the change. When the amount of change exceeds a certain threshold, the liquid level is considered to reach the sensing point.

**Dimension**

**Connection Diagram**

###  Features

8. High sensitivity
9. Adopts 3-pin DuPont connector
###  Applications

11. Beverage machines
12. Small water pipe level detection
13. Infusion pipe level detection scenarios
###  Specification

15. Working Voltage: 2.5~5.5VDC
16. Working Current: 5V290uA 3V235uA
17. Output: low (liquid detected), high level(no liquid detected)
18. Hysteresis: ±0.25%FS
19. Interval Medium: plastic
20. Protection Level: IP62
21. Operating Temperature: -20~100°C
22. Weight: 3g
###  Documents

24. [Product wiki](https://wiki.dfrobot.com/Capacitive_Pipeline_Liquid_Level_Sensor_SKU_SEN0509)
###  Parts List

26. Capacitive Pipeline Liquid Level Sensor x1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/i/m/image_12223.jpg)