What is the Cl2 Gas Sensor Module?

The Cl2 Chlorine Gas Sensor Module TB200B is the perfect combination of a state of the art sensing device based on the liquid electrochemical sensor technology with a sophisticated circuit board. The single gas sensor offers in general a simple and easy-to-use solution for your application. As a matter of fact it makes using a gas sensor easy by transforming a small sensor signal into a standardized digital output.

Why would I use the EC Sense Gas Sensor Module TB200B?

While you can focus on your area of expertise you do not have to worry about the sensor technology and moreover the tedious work of calibration. Because you can simply integrate the Cl2 Gas Sensor Module TB200B into your device. Furthermore the TB200B Gas Sensor Module has a standard UART digital output. It detects gas, temperature and humidity and easily receives all the data simultaneously. In addition to that it has a low power consumption as well as a small footprint.

What Sensor Technology is used?

At the heart of the TB200B Sensor Module is a liquid electrochemical sensor. This Liquid electrochemical sensing technology is a revolutionary innovation in the field of electrochemical detection. In essence this technology is based on the principle of electrochemical catalytic reaction. Accordingly, this technology detects the output signals of the electrochemical reactions of different gases. Moreover, the EC Sense liquid electrochemical sensors have excellent sensitivity at lower temperatures. With a double sealed housing for advanced leakage protection, it furthermore has a stable zero point and a fast stabilization time. The Sensor Modules have a RoHS approved eco-friendly design and above all have a more accurate detection.

Check out our Evaluation Kit!

EC Sense offers an Evaluation Kit with an USB to TTL adapter. In addition the EC Sense kit contains an easy-to-use testing software. This testing software can be effortlessly installed on any standard PC, allowing to test and equally get familiar with the product. Check out our accessories or click here!


  • Detects with high selectivity a wide variety of gases
  • Long lifetime > 2 years
  • Double sealed housing for advanced leakage protection
  • Stable zero return time
  • Linear output
  • High Sensitivity
  • No power consumption
  • Wide operation temperature range of -20° to +55°C
  • RoHS approved environmental design


Technical Parameters

  • Measurement Range: 0 – 5ppm
  • Resolution: 0.01ppm
  • Response Time: T50 < 20 sec. / T90 < 60 sec.
  • Output: 3.3V UART digital signal
  • Working Voltage: 3.3 – 5.5V DC
  • Weight: < 25g
  • Dimensions (with sensor): 40mm x 30mm x 22.45mm




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