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E+H Turbimax CUS51D Digital Turbidity and Suspended Solids (TSS) Sensor
CUS51D-AAD1A3
Designed for demanding industrial and wastewater environments, this high-precision digital optical sensor utilizes standard 90° scattered light and 4-beam alternating light technology to deliver wide-range, drift-free real-time measurement of turbidity and total suspended solids (TSS). Featuring a smart RS485 Modbus RTU interface for immune-to-interference long-distance digital signal transmission, an integrated compressed air auto-cleaning system to prevent optical fouling in harsh media, and factory multi-point pre-calibration, it provides an IP68 submersible, low-maintenance solution housed in durable 316L Stainless Steel or Titanium with scratch-resistant sapphire glass windows.
Our advanced Digital Turbidity and Total Suspended Solids (TSS) Sensor provides a robust and intelligent solution for continuous online water quality monitoring across municipal wastewater plants and diverse industrial liquid processes. Built around high-performance multi-beam optical scattering technology, the sensor automatically compensates for ambient light interference, sample color variations, and optical component aging, ensuring ultra-stable measurement results across both low-turbidity clear water and high-concentration activated sludge applications.
The sensor is engineered with a heavy-duty IP68 submersible housing crafted from premium 316L stainless steel or corrosion-resistant titanium, paired with scratch-resistant sapphire glass optical windows capable of withstanding working pressures up to 10 bar. By outputting standard RS485 Modbus RTU signals directly from its embedded digital processor, the sensor allows seamless plug-and-play integration into existing PLCs, SCADA networks, and remote IoT monitoring systems without requiring proprietary controller hardware. To ensure long-term unattended operation in bio-fouling and heavy sludge environments, the probe comes equipped with an integrated compressed air nozzle that automatically cleans the optical window with high-pressure air bursts, drastically reducing manual maintenance requirements and field operating costs.
FAQ
Q1: How does the auto-cleaning feature work in dirty sludge environments?
A: The sensor features an integrated compressed air jet system. By connecting an external compressed air source controlled by the transmitter relay, periodic high-pressure air pulses blow away biofilms, sediment, and particles from the sapphire window without removing the probe.
Q2: Does the sensor come factory calibrated?
A: Yes, all sensors are pre-calibrated with standard Formazin solutions. In addition, the sensor supports application-specific multi-point user calibration for exact TSS (g/L) mapping based on real sludge samples.
Q3: Can this digital turbidity sensor connect directly to our existing PLC or SCADA system?
A: Absolutely. The sensor uses standard Modbus RTU over RS485, allowing direct connection to PLCs, RTUs, and industrial gateways without needing a proprietary transmitter.
Q4: Do you support OEM/ODM customization for international distributors?
A: Yes, as a direct automation instrument manufacturer, we provide custom OEM branding, tailored cable lengths, private labeling, and custom communication protocols for global partners.
Spécifications techniques
| Measurement Principle | Four-beam alternating light |
|---|---|
| Applications | Wastewater, process water, and primary water treatment applications. Turbidity and suspended solids measurement at all stages of the wastewater treatment process and at primary water treatment applications with medium to high turbidities. |
| Installation | Insitu (immersion in process or retractable holder), extractive with sample and flow cell. |
| Design | 40 mm sensor, stainless steel |
| Dimensions | 194 mm x 40 mm |
| Material | Stainless steel 316L |
| Measurement Range | For formazine: 0 to 4000 FNU; Display range up to 9999 FNU; For sludge: 0 to 300 g/L; The achievable measuring range depends very much on the medium. |
| Connection | G1, NPT3/4" |
| Protection Rating | IP68 (1 m / 3.3 ft) water column with 1N KCl during 60 days. |
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