GE AT868W-2-1-1-1 belongs to GE Panametrics AquaTrans professional liquid ultrasonic flow measurement series. Each field of the model code corresponds to fixed factory configuration: AT868 represents the core flowmeter platform; W stands for wall-mounted aluminum shell structure with NEMA4X outdoor protection grade; the first digit 2 is dual-channel measurement configuration, supporting simultaneous detection of two pipelines or dual-path averaging measurement for a single pipeline to optimize flow field adaptability; the second digit 1 is standard isolated 4–20mA analog output module; the third digit 1 defines basic RS232 serial communication function; the last digit 1 stands for standard power supply scheme and complete totalizer function without customized special options.

The core measurement principle is Correlation Transit-Time ultrasonic detection. The host sends and receives coded ultrasonic signals through paired external sensors, calculates fluid flow velocity according to the difference of upstream and downstream sound wave propagation time, and outputs real-time flow velocity, instantaneous volumetric flow and cumulative flow data via internal high-speed microprocessor algorithm operation. Dual-channel design effectively improves measurement stability for pipelines with disordered flow fields, partial bubbles and slight sediment, with the basic measurement accuracy controlled within ±2% of the reading under standard straight pipe section conditionsManualsLib.

This transmitter supports two matching transducer forms: external clamp-on type and insertion wetted type. The clamp-on scheme does not need pipeline cutting, drilling or shutdown construction during installation, completely avoiding medium leakage risk and production loss, applicable to metal, plastic, lined pipelines with pipe diameter ranging from 12.7mm to 5080mm. Wetted sensors can obtain higher precision measurement data and adapt to high-pressure working conditions in industrial process pipelines. The measurable medium covers tap water, circulating cooling water, sewage, reclaimed water and low-viscosity industrial process liquid with low air content.

The shell adopts coated cast aluminum material with IP67 dustproof and waterproof performance, suitable for humid pump rooms, outdoor pipe galleries and dusty factory workshops. The front panel is equipped with LCD display and physical operation keys, supporting on-site parameter setting, real-time data viewing, fault self-diagnosis and historical total value query, equipped with multi-level password lock to prevent parameter tampering by irrelevant personnel. The built-in multi-stage hardware filtering circuit suppresses waveform interference caused by pipeline mechanical vibration, power frequency noise and medium impurities, ensuring long-term drift-free operation of measurement data.

In terms of signal transmission configuration, isolated 4–20mA analog quantity and RS232 communication can be connected to DCS, PLC and SCADA centralized control systems to realize remote data uploading and monitoring. The equipment supports wide-range working ambient temperature of -10℃ ~ 55℃, with low power consumption of the whole machine, no mechanical moving parts inside the electronic main unit, and only regular inspection of probe fastening status and cable integrity is required for daily maintenanceManualsLib.

Every AT868W-2-1-1-1 unit is calibrated and inspected with standard flow calibration devices before leaving the factory, with good batch parameter consistency. It complies with CE EMC safety certification standards, and is widely used in municipal water supply and drainage, thermal power circulating water, chemical factory liquid delivery and building energy consumption water balance monitoring, being a mainstream economical non-intrusive flow metering equipment in the industry.