> **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

# Gravity: CL2 Sensor (Calibrated) - I2C & UART

**Type:** Product page · **SKU:** SEN0468 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/gravity-cl2-sensor-calibrated-i2c-uart.html ([markdown](https://core-electronics.com.au/gravity-cl2-sensor-calibrated-i2c-uart.html.md))

The factory-calibrated chlorine sensor has a variety of signal output methods to meet various communication needs...

## Pricing

- **Price:** $234.95 (inc GST) — $213.59 AUD, exc GST
- **Quantity discounts:** 6+ $202.91 (exc GST) · 12+ $194.36 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 19 and Aug 24.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SEN0468:1` (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/SEN0468:1.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

This is a sensor that detects chlorine concentration and supports three output modes: analog, I2C, and UART. **The probe has been calibrated at the factory, which can quickly and accurately measure the concentration of chlorine in the environment.** Can be widely used in the detection of chlorine in the chemical, pharmaceutical production, and environmental protection fields.

The probe adopts the electrochemical principle, has the characteristics of strong anti-interference ability, high stability, high sensitivity, etc., and the service life is as long as two years. The sensor has 32 modifiable I2C addresses, an integrated temperature compensation algorithm, and a threshold alarm function, It has good compatibility with mainstream main control devices such as [Arduino](https://core-electronics.com.au/arduino.html), [ESP32](https://core-electronics.com.au/development-boards.html#category_2184), and [Raspberry Pi](https://core-electronics.com.au/raspberry-pi.html). The easy-to-use Gravity interface, coupled with our sample code, can quickly build a hydrogen chloride concentration detector.

DFRobot has introduced 12 gas detection sensors in this series, [CO](https://core-electronics.com.au/gravity-co-sensor-calibrated-i2c-uart.html), [O2](https://core-electronics.com.au/gravity-o2-sensor-calibrated-i2c-uart.html), [NH3](https://core-electronics.com.au/gravity-nh3-sensor-calibrated-i2c-uart.html), [H2S](https://core-electronics.com.au/gravity-h2s-sensor-calibrated-i2c-uart.html), [NO2](https://core-electronics.com.au/gravity-no2-sensor-calibrated-i2c-uart.html), [HCL](https://core-electronics.com.au/gravity-hcl-sensor-calibrated-i2c-uart.html), [H2](https://core-electronics.com.au/gravity-h2-sensor-calibrated-i2c-uart.html), [PH3](https://core-electronics.com.au/gravity-ph3-sensor-calibrated-i2c-uart.html), [SO2](https://core-electronics.com.au/gravity-so2-sensor-calibrated-i2c-uart.html), [O3](https://core-electronics.com.au/gravity-o3-sensor-calibrated-i2c-uart.html), [CL2](https://core-electronics.com.au/gravity-cl2-sensor-calibrated-i2c-uart.html), [HF](https://core-electronics.com.au/gravity-hf-sensor-calibrated-i2c-uart.html), which are used in exactly the same way and data format, so you can combine them according to your needs.

![Gravity: CL2 Sensor (Calibrated) - I2C & UART](https://core-electronics.com.au/attachments/localcontent/1(2)_18296768145.png)

###  Features

6. Strong anti-interference ability
7. High stability
8. High sensitivity
###  Applications

10. Chemical chlorine detection
11. pharmaceutical production chlorine detection
12. Environmental protection device
###  Specification

14. Detection Gas: Chlorine (CL2)
15. Detection range: 0~10ppm
16. Working Voltage: 3.3~5.5V DC
17. Working Current: <5mA
18. Output Signal: I2C, UART (0~3V), analog voltage
19. Working Temperature: -20°C ~ 50°C
20. Working Humidity: 15~90%RH (non-condensing)
21. Storage Temperature: -20°C ~ 50°C
22. Storage Humidity: 15~90%RH (non-condensing)
23. Lifespan: >2 years (in the air)
24. Adapter Plate Size: 37\*32mm
25. Compatibility: Arduino, ESP32, Raspberry pi
  **Documents**27. [Product wiki](https://wiki.dfrobot.com/SKU_SEN0465toSEN0476_Gravity_Gas_Sensor_Calibrated_I2C_UART)
###  Parts List

29. Gravity: Chlorine Signal Conversion Board x1
30. Chlorine sensor probe x1
31. Gravity - 4pin Cable x1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/i/m/image_12834.jpg)