Siemens photocell model QRA2

Technical and Numerical Specifications of Siemens Photocell Model QRA2 Ask ChatGPT

The Siemens photocell model QRA2 is technically engineered to accurately detect flames under various environmental conditions. This ultraviolet UV sensor operates within a wavelength range of 190 to 270 nanometers, specifically tuned for the detection of real flames. It typically requires a supply voltage of around 220V AC and has very low power consumption. The QRA2 features a rapid response time of less than one second, enabling quick and reliable detection of flame presence or absence, which is essential for safety-critical applications.

In terms of dimensions and structure, the QRA2 photocell features a durable metal housing resistant to heat and impact, with an approximate length of 60 millimeters and a diameter of 18 millimeters. It is capable of operating reliably in ambient temperatures ranging from -20 to +80 degrees Celsius. The electrical connection is made through a heat-resistant cable, and the sensor is equipped with a ceramic base to ensure long-term durability. The QRA2 integrates seamlessly with Siemens flame controllers from the LFL, LGK, and LAL series, making it a reliable choice for industrial burners operating in demanding environments.