GF868-1-31-21A adopts optimized correlation transit-time algorithm tailored for low-density gas media, solving measurement difficulties brought by turbulent flow, unstable gas composition and low sound velocity inside industrial gas pipelines. The external clamping installation mode needs no pipeline cutting, drilling or production shutdown during field deployment. No internal components contact measured gas medium, resulting in zero pipeline pressure loss and no blockage risk, which adapts to dirty, pulsating and bidirectional operating conditions of petrochemical flare pipelines, fuel gas delivery pipelines and industrial waste gas exhaust pipelines. The built-in multi-level digital filtering and waveform self-correction module suppress echo clutter caused by pipeline dirt deposition, inner wall corrosion and strong electromagnetic interference from workshop inverters and high-power motors, maintaining stable measuring accuracy under harsh industrial environments.

The transmitter is designed with local LCD display and physical operation buttons for on-site parameter configuration, real-time checking of instantaneous flow velocity, volumetric flow and accumulated flow data. It is equipped with 4–20mA analog output, Modbus RTU/TCP digital communication and built-in data logging function, which can upload measured data to DCS, SCADA and environmental supervision platforms synchronously to meet the data traceability requirements of environmental protection and metering management departments. The whole machine supports standard DIN rail installation for centralized layout inside explosion-proof instrument cabinets. The sealed industrial casing has dust-proof and moisture-proof properties, operating stably in the temperature range of -20°C to 60°C under 95% non-condensing humidity to satisfy unattended long-term online monitoring demands.

Each finished GF868-1-31-21A is calibrated on a professional gas flow standard bench, combined with long-time powered aging test and insulation safety detection before factory delivery to ensure long-term stable metering performance. Circuit aging and signal drift of old transmitters will cause gas flow data distortion, bringing compliance risks to enterprise emission reports and gas material balance settlement. Replacing with qualified original transmitters supports plug-and-play commissioning without large-scale revision of system configuration parameters, effectively shortening maintenance downtime and production losses.

Brand-new transmitters are matched for new gas metering system construction projects, while calibrated spare transmitters are applied to daily maintenance and fault replacement of online gas monitoring equipment. Accurate gas flow data provided by this transmitter helps enterprises control ineffective flare emission waste, optimize gas combustion process parameters and reduce energy consumption loss. It lowers the long-term operation and maintenance cost of industrial gas metering links, and provides reliable metering guarantee for safe and standardized operation of gas conveying and exhaust systems under long-cycle continuous industrial production conditions.