Industrial Gas Sensors for Fixed Gas Monitors

Flammable gases and vapors, predominantly hydrocarbons, are commonly detected using NDIR sensors (Nondispersive Infrared). These sensors operate based on the principle of measuring the absorbance of infrared light at specific wavelengths within the range of 3.3 to 3.4 micrometers. A temperature-compensating linearization algorithm is employed to help ensure accurate and reliable detection, thus helping to enable precise substance-specific signal output.

NDIR sensors exhibit heightened sensitivity and effectiveness in detecting a wide range of hydrocarbons. Their capabilities extend to virtually all types of hydrocarbons, helping to ensure reliable and sensitive detection across various applications.

Under specific conditions, flammable gases and vapors can undergo oxidation through a heat-releasing reaction with atmospheric oxygen. To facilitate this process, a catalyst material is employed. The catalyst material experiences measurable heating as the reaction occurs, increasing temperature.

This temperature rise impacts the resistance of an element installed in a Wheatstone bridge configuration. By measuring the changes in resistance, the gas concentration can be determined. The resistance variations in the Wheatstone bridge provide valuable data that can be utilized to assess the target gas concentration accurately.

Our MetCam is specifically designed to monitor Methane or Natural gas clouds in large industrial Ex areas. It is a fully integrated camera unit that can autonomously detect methane and natural gas clouds that exceed safety levels, providing timely warnings to prevent accidents. MetCam can also detect small emissions for routine preventive maintenance operations and serves as a situational awareness camera. MetCam is built with high reliability components and has no moving parts, enhancing its operability and eliminating the need for special maintenance or calibrations, except for external cleaning periodically.

Ultrasonic gas leak detection works by utilizing specialized sensors that detect high-frequency sound waves emitted by gas leaks. These sensors are designed to detect the distinct ultrasonic frequencies produced by the turbulence and vibrations caused by the escaping gas. When a gas leak occurs, the sensor picks up these ultrasonic signals and converts them into electrical signals. The electrical signals are then analyzed by the system to identify and locate the gas leak. Ultrasonic gas leak detection is known for its effectiveness in detecting leaks in various gas systems, including compressed air, steam, natural gas, and other industrial gases. It offers a non-intrusive and reliable method for early detection of gas leaks, enhancing safety and minimizing the risk of accidents.

The Photo-Ionization Detector (PID) is a sensor integrated into our portable or fixed detectors, used for the detection of volatile organic compounds (VOCs) such as Benzene, Butadiene, Toluene, and some inorganic compounds. It can detect these compounds within a range from parts-per-billion (ppb) to thousands of parts-per-million (ppm). The key component of a PID is the UV lamp, which emits photons to ionize the gases. When ionizable substances enter the sensor’s measuring chamber, their electrical conductivity increases, resulting in a charge exchange and current flow between the installed electrodes. The current level is directly proportional to the gas concentration and is displayed in parts per million (ppm) on the detector’s screen.

The Dräger Flame 1500 flame detector uses its triple IR sensor to detect hydrocarbon fires. It provides excellent false alarm immunity, as approved by FM while maintaining a response time of under 4 seconds.

The powder-coated housing made of stainless steel or aluminum is very robust and weatherproof. The viewing window is heated to protect against icing and fogging and is therefore used in harsh environments. The three-color LED on the front lets you quickly see the unit’s status.

The Dräger Flame 1750 H₂ is specifically designed for the detection of hydrogen fires. Its three IR sensors measure in the range of 2 to 4 μm relevant for hydrogen flames, guaranteeing high thereby high performance and a low false alarm rate. Common sources of false alarms, such as hot CO₂ or welding work.