XMT868i stands for intrinsically safe version of XMT868 fixed liquid flow host. Each segment of the model code defines power supply mode, housing protection grade, communication configuration, analog output definition, customized factory program code and accessory matching parameters respectively. This host works cooperatively with M27R, M2LRZ, 36DL, EHC-09 and other clamp-on ultrasonic transducers, receives ultrasonic echo signals, and relies on built-in high-performance signal processing circuit to calculate flow velocity, instantaneous flow rate and total cumulative flow data in real timeManualsLib.

The equipment adopts full digital correlation transit-time algorithm, equipped with intelligent echo screening and noise suppression logic. It effectively eliminates measurement interference caused by pipeline vibration, medium turbulence, pipe wall scaling and tiny bubbles in liquid, and maintains stable measuring accuracy for clean water, circulating water, slightly contaminated process liquid and other medium working conditions. The measurement precision can reach ±0.5% of reading after on-site calibration, and the measurable pipe diameter range covers 12.7mm to 7.6m, compatible with carbon steel, stainless steel, cast iron and various plastic pipelines.

The whole machine is designed with explosion-proof flameproof enclosure, complying with Class I Div.1 explosion-proof standard and ATEX EEx d IIC T6 safety certification, which can be stably deployed in Zone 1 and Zone 2 flammable and explosive hazardous environments such as petrochemical plants, refineries and chemical workshops. The shell is made of cast aluminum with epoxy anti-corrosion coating, reaching IP66 protection level, adapting to long-term operation in harsh environments with dust, condensate splash and temperature fluctuation of -40℃ ~ +60℃ManualsLib.

It is equipped with 712-1024 backlight LCD display module and physical operation keys on the panel, supporting on-site setting of pipe parameters, medium parameters, probe frequency and alarm threshold, while intuitively displaying signal quality, real-time flow value and system fault codes locally. Standard isolated 4–20mA analog output and RS485 Modbus communication interface are reserved inside the host, which can seamlessly upload measurement data to DCS, PLC and SCADA system to realize remote monitoring, data recording and over-limit interlock protection.

The built-in 703-1610-00 dedicated power supply board has perfect surge, overvoltage and short-circuit protection functions to resist the impact of power grid voltage surge and instantaneous fluctuation on the internal circuit. The wiring terminals are in standardized marking, supporting plug-and-play connection with 710-1247 original shielded signal cables, and cooperating with 95C2001 mounting fixtures and 25998 acoustic couplant to build a complete closed-loop ultrasonic flow measurement system.

Each XMT868i-1-11-00-07114-0 undergoes flow calibration bench detection, long-time aging test, explosion-proof performance inspection and communication function verification before factory delivery, with independent customized program solidified by the code 07114. There are no mechanical moving wearing parts inside the transmitter, with low natural failure rate. Daily maintenance only includes regular cleaning of display dust, inspection of wiring fastening state and periodic inspection of probe coupling condition; each internal functional board can be replaced separately during maintenance to reduce equipment maintenance cost and downtime loss.

It is widely applied in petrochemical process pipeline flow monitoring, oilfield produced water metering, chemical plant cooling water system measurement, thermal power circulating water monitoring and other flow measurement scenarios with hazardous gas environments, which is a core safe measurement host for industrial dangerous working condition liquid flow monitoring.