The AT868 series is a dedicated fixed ultrasonic host designed for general industrial gas medium measurement, different from the GF868 flare gas customized host. The segmented coding of AT868W-1-1-1-1 separately defines power supply type, enclosure rating, analog output layout, communication configuration and factory standard firmware version. This transmitter works with USL-42, ILP-1 and other GE insertion gas probes to collect upstream and downstream ultrasonic time difference signals, then computes gas flow velocity, instantaneous volumetric flow and total cumulative flow through built-in high-speed digital signal processing circuits.

Equipped with optimized gas echo identification algorithm, the unit suppresses signal distortion brought by gas turbulence, pipeline pressure pulsation and tiny particulate impurities inside gas flow. It adapts to conventional measurement media including compressed air, nitrogen, natural gas, fuel gas and inert shielding gas, covering pipe diameters ranging from small-bore process tubes to large industrial gas headers. The overall measurement precision meets general industrial gas metering management requirements after field parameter calibration.

The W suffix stands for wall-mounted installation structure, matched with industrial grade sealed metal casing that reaches IP65 protection grade. Internal circuit boards adopt three-proof conformal coating to resist moisture, dust and slight corrosive gas erosion within instrument cabinets, compressor rooms and factory pipe areas, working steadily under ambient temperatures of -20°C to +60°C. Standard non-explosion intrinsic safety configurations can be matched with safety barriers for deployment in Zone 2 low-risk hazardous gas areas.

A local LCD display module and membrane buttons are configured on the front panel for on-site configuration of pipe parameters, gas medium properties and transducer parameters. Operators can directly check real-time flow data, signal strength values and system fault alarm codes on the local screen without external configuration tools. Standard isolated 4–20mA analog output and RS485 Modbus communication interfaces are provided for seamless data transmission to DCS, PLC and SCADA centralized control platforms to realize remote data recording, trend monitoring and abnormal flow interlock control.

The built-in dedicated power board is fitted with complete overvoltage, overcurrent and surge protection mechanisms to avoid circuit damage caused by on-site power grid fluctuations. Standard terminal definitions facilitate wiring connection with original GE transducer shielded cables. Combined with matched probe mounting hardware, it constitutes a complete non-intrusive gas flow measuring system without pipeline cutting or process shutdown during installation and maintenance, bringing zero pressure loss to gas delivery pipelines.

Every AT868W-1-1-1-1 transmitter passes bench flow calibration, long-term power aging testing and communication function verification before delivery. No mechanical wearable components exist inside the equipment with low long-term failure probability. Routine daily maintenance only requires regular cleaning of display dust, inspection of wiring terminal tightness and periodic inspection of probe working conditions. Independent replacement of internal display boards, power modules and signal processing boards greatly reduces on-site maintenance costs and equipment downtime.

Typical application scenarios include factory compressed air pipe network metering, air separation unit gas delivery monitoring, heat treatment furnace protective gas flow control, municipal conventional gas pipeline measurement and general chemical process gas flow statistics, serving as the mainstream general-purpose gas ultrasonic host for conventional industrial gas metering projects.