AU400Multi-parameter Field Transmitter

Harsh chemical plants expose transmitters to corrosive atmospheres, moisture, electrical noise, and potential explosion hazards. The AE200 field transmitter features a two-wire intrinsically safe design with isolated transmission outputs to prevent ground loop interference in petrochemical environments. For multi-parameter field sites, the AU400 provides IP66 protection, an AC/DC power supply, and UL94V-0 flame retardancy. Transmitters must be paired with appropriate chemical-resistant pH, conductivity, or DO sensors. Since mounting arrangements and safety certifications vary by site region, specific explosion-proof compliance must be confirmed for the selected configuration. Please inform our engineering team of your medium, flow range, pressure, temperature, viscosity, tube size, process connection, and required output.

Multi-channel liquid analytical transmitters streamline operations where multiple parameters dictate process quality. The AE600 field transmitter features a 4.0-inch color touchscreen with dedicated dual-channel algorithms specifically tailored for biopharmaceutical fermentation pH and DO tracking. The AU400 universal controller automatically recognizes digital sensors across dual channels, offering quick display switching between numerical readings and real-time trend curves. Using multi-channel units cuts installation footprint and enclosure wiring expenses. However, sensor power budgets and channel isolation options vary, so this must be confirmed for the selected configuration. Submit your medium, flow range, pressure, temperature, viscosity, tube size, process connection, and required output to customize your transmitter package.

Selecting the communication protocol depends on control system architecture and data requirements. Standard isolated 4-20mA current loops provide reliable noise-immune transmission for primary process parameters over long cable distances. Digital RS485 Modbus RTU interfaces, available on transmitters like the AU400 and B Series DIN Rail units, allow digital PLCs to read primary values, secondary temperature data, diagnostic status, and execute remote calibrations. Wireless options like NB-IoT are also available on selected models. Electrical isolation and power loop requirements vary, so exact field wiring compatibility must be confirmed for the selected configuration. Share your medium, flow range, pressure, temperature, viscosity, tube size, process connection, and required output with our application engineers.

The AU400 universal field transmitter eliminates the need to stock multiple dedicated controllers. Featuring dual sensor input channels, it automatically identifies connected digital sensors—including pH, ORP, conductivity, DO, turbidity, sludge concentration, residual chlorine, ammonia nitrogen, and COD—enabling true plug-and-play field setup. The transmitter features a 4.3-inch full-view color screen with quick switching between numerical parameter modes and real-time trend curves. It supports AC (85-265V) or DC (21.6-26.4V) power, providing isolated RS485 Modbus RTU communications inside an IP66, UL94V-0 flame-retardant housing. Wireless NB-IoT and mobile app integration are optional. Channel assignment and sensor power supply must be confirmed for the selected configuration. Submit your parameters for advice.

Pure water and ultrapure water exhibit non-linear conductivity and pH changes with temperature due to self-ionization of water molecules. Standard linear temperature compensation introduces significant measurement errors in high-purity water lines. Transmitters like the AE600, AE300, and AU400 integrate dedicated non-linear pure water and ultrapure water temperature compensation algorithms alongside linear, acid, and alkali curves. Supporting PT100, PT1000, NTC10K/30K, and DKK10K temperature sensors, the transmitters automatically normalize readings to 25°C standard values. Input resolution is 0.01 pH or 0.01 uS/cm. Custom temperature curve coefficients must be confirmed for the selected configuration. Send your medium, flow range, pressure, temperature, viscosity, tube size, process connection, and required output to our engineers.