Wholesale Turbidity Meter Sensor Factory & Global OEM Supply

The fundamental difference lies in the light emitter wavelength and optical receiver specifications. ISO 7027 uses a monochromatic near-infrared (NIR) LED emitting at 860 nm with a 90° detector. Because this wavelength is not absorbed by dissolved organics or water coloration (e.g., yellowish humic compounds), it delivers superior repeatability in wastewater, aquaculture, and colored industrial streams. US EPA 180.1 mandates a tungsten filament lamp emitting broad white light (400–680 nm). While it offers high sensitivity to ultra-small colloidal particulates below 1 NTU in clean potable water, it is vulnerable to sample color interference and lamp degradation over time.

BOQU optical turbidity probes use scratch-resistant synthetic optical sapphire windows with a Mohs hardness of 9. The automated wiper utilizes a chemical-resistant silicone or fluoro-elastomer blade driven by an internal miniature high-torque stepper motor. During wiping sequences, the motor sweeps the blade 360° across the flat optical plane before parking outside the optical viewing angle. This mechanical action strips bio-films, algae, and calcium carbonate precipitants without altering optical refraction.

Yes. Our IOT-485 digital series features built-in micro-processing electronics sealed inside the sensor body. The sensor calculates temperature-compensated NTU and TSS values internally and outputs RS485 Modbus-RTU directly through its shielded cable. This allows system integrators and OEM skid builders to daisy-chain dozens of sensors straight into a central PLC, SCADA, or IoT edge gateway, eliminating individual panel transmitter hardware costs by over 45%.

For critical municipal potable water installations, calibration verification is typically conducted monthly or quarterly. Secondary waste treatment plants typically verify zero and span every 3 to 6 months. Calibration is established using standard Formazin turbidity stock solutions (4000 NTU standard diluted with zero-turbidity DI water) or non-toxic AMCO Clear styrene divinylbenzene polymer bead standards. BOQU sensors also provide zero-point calibration in air or zero water for rapid field recalibration.

As a direct factory manufacturer since 2007, we offer end-to-end OEM/ODM services. This includes CNC machining custom body materials (SS316L, Titanium, Delrin, CPVC), custom thread fittings (1" NPT, 3/4" NPT, PG13.5, sanitary flanges), custom cable lengths up to 100 meters, personalized laser engraving of client logos and model numbers, proprietary Modbus register mapping, and specialized GUI/firmware for our multichannel controllers.

Every sensor produced in our Kangqiao and Lingang factories undergoes an automated 48-hour continuous power burn-in to eliminate early component failure. Optical alignment is tuned on collimated optical benches, followed by multi-point Formazin accuracy certification and pressure testing at 0.6 MPa. With our owned manufacturing floor space of 4,632 m² and automated inventory management, standard wholesale batch orders ship within 5 to 10 working days.