What is the HF Gas Sensor and how does it work?

The EC Sense EC4-HF-10 Hydrogen Fluoride Gas Sensor is a liquid electrochemical gas sensor, known for its extended lifespan and durability. Notably, it operates without any power consumption and boasts a compact design. This EC4-HF-10 Gas Sensor is specifically engineered to detect Hydrogen Fluoride gases, which are crucial to detect in various applications. When paired with the EC Sense Smart Digital Board, it simplifies integration, eliminating the need for labor-intensive sensor calibration.

Understanding the technology behind it

At the core of the EC4 Gas Sensor lies a liquid electrochemical sensor. This liquid electrochemical technology is based on the principle of electrochemical catalytic reactions. It accurately measures gas concentrations through the signals produced by electrochemical reactions.

The inner workings of the technology

The EC Sense Gas Sensor is composed of three catalytic electrodes, liquid electrolytes and gas diffusion holes. The gas reaches the working electrode of the sensor through the diffusion holes, where an electrochemical reaction takes place at a so called 3-phase boundary. This reaction generates a current signal as output which is linear proportional to the gas concentration.

What sets EC Sense EC4 Gas Sensors apart?

Setting the EC Sense EC4 Gas Sensors apart is their exceptional sensitivity at lower temperatures. Featuring a double-sealed housing for advanced leakage protection, the EC Sense sensors exhibit a stable zero point and fast stabilization time. Therefore, it allows the sensor to be effortlessly integrated into various applications. With a RoHS compliant design, the EC Sense Gas Sensors demonstrate a stronger adaptability to the environment. Notably, the EC4 Gas Sensors ensure accurate detection and boast a robust anti-electromagnetic interference ability, thanks to the innovative micro circuit design.


  • 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 – 10 ppm
  • Resolution: < 0.1 ppm
  • Maximum Overload: 20 ppm
  • Sensitivity: -350 nA/ppm ± 100 nA/ppm
  • Response Time: T50 < 40 sec. / T90 < 80 sec.
  • Weight: < 8 g
  • Dimensions (sensor): Ø20 x 16.6 mm (without pins)



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