> **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

# Ultrasonic Liquid Level Sensor

**Type:** Product page · **SKU:** SEN0356 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/ultrasonic-liquid-level-sensor.html ([markdown](https://core-electronics.com.au/ultrasonic-liquid-level-sensor.html.md))

## Retired product

This product is retired and no longer available for purchase. Search the catalogue for an alternative.

## How to buy

- **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

Based on the principle of ultrasonic detection, this liquid level sensor can accurately measure the liquid level of various toxic substances, strong acid/alkali, or pure liquid in high-temperature and high-pressure closed containers without contacting with the solution.

The maximum detection height of the sensor reaches up to 2m. It should be powered at DC3.3V-12V. The sensor adopts UART output and is compatible with all sorts of main-controller boards like [Arduino](https://www.dfrobot.com/topic-277.html), [Raspberry Pi](https://core-electronics.com.au/raspberry-pi.html). Besides that, the module offers only 1s response time and 1mm resolution. The sensor can stably output the current liquid level in real-time, and even no need to restart when the container gradually empties, and then liquid backs up into it again. Moreover, it comes with temperature compensation that can automatically correct the measured value according to the actual working temperature to ensure that the detected height is accurate enough.

**How to install an ultrasonic liquid level sensor?**

![Ultrasonic-liquid-Level-Sensor-diagram](https://core-electronics.com.au/media/wysiwyg/product_images/Ultrasonic-liquid-Level-Sensor-diagram.jpg)

The module adopts an integrated probe design, small in size, and easy to install. The sensor has no special requirements for the material of liquid or container to be detected since the ultrasonic wave can penetrate metal, ceramic, plastic, and glass, etc. It can be widely used for liquid level real-time detection of various media in fields, such as petrochemical, metallurgy, electric power, pharmaceutical, water supply, and drainage, environmental protection.

![Ultrasonic-liquid-Level-Sensor-diagram-1](https://core-electronics.com.au/media/wysiwyg/product_images/Ultrasonic-liquid-Level-Sensor-diagram-1.jpg)

**Note:**

1\. At room temperature, the blind zone and detection limit height of the sensor vary with the material of containers, such as metal, glass, ceramics, non foaming plastic, etc.

 2. The blind zone and detection limit height of the sensor also will be different for the same material container with different thickness at room temperature. 3\. When the liquid level to be detected exceeds the detection range of the sensor, or the liquid level fluctuates greatly, the sensor could not give stable performance.

4\. You may have to apply Couplant or AB glue on the surface of the sensor in actual use. The couplant can be used for testing. If you need to fix your sensor at a position for a long time, AB glue is highly recommended (A glue and B glue should be mixed before using).

#### Specification

- Operating Voltage: DC3.3V-12V
- Average Current: ＜35mA
- Blind Zone: ≤50mm
- Measuring Range: 50mm-20000mm
- Operating Cycle: 1s
- Output: UART
- Resolution: 1mm
- Response Time(with liquid): 1s
- Response Time(without liquid): 10s
- Accuracy(at room temperature): (±5+S\*0.5%) mm
- Probe Center Frequency: 2MHz
- ESD: ±4/±8KV
- Operating Temperature: -15-60℃
- Storage Temperature: -25-80℃
- Material Compatible: metal, plastic, glass, etc
- Dimension: diameter 27.7mm±0.5mm; height 17mm±1mm; cable length 450mm±10mm
 
#### Documents

- [Product wiki](https://wiki.dfrobot.com/Ultrasonic_Liquid_Level_Sensor_SKU_SEN0356)
 
#### Shipping List

- Ultrasonic Liquid Level Sensor x1
- Couplant x1
- AB Glue x1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/s/e/sen0356-1.jpg)