HU-200TB-W, Field-Installation Type Turbidity Meter, HORIBA

The HU-200TB-W is HORIBA's field-installation type turbidity meter, designed for continuous turbidity monitoring at process locations subject to wide turbidity fluctuations — including water intake points, sedimentation tanks, and filtration process control applications. The system consists of the HU-200TB-W converter and the SS-120-W industrial turbidity detector, which uses the 90° transmission-scattering method with a near-infrared LED light source at 860 nm. By simultaneously measuring both transmitted and scattered light, the instrument compensates for variations in the light source and detector as well as light attenuation due to contamination, delivering stable and accurate readings even in demanding environments. Automatic four-range switching covers turbidity from low to high levels without manual intervention, making the system well suited to locations where turbidity changes significantly over time. An optional motorised electric wiper cleaning function with outstanding cleaning power, combined with the long-life LED light source, minimises maintenance requirements. An optional automatic zero calibration function further reduces manual calibration effort.

Key Features HU-200TB-W

• 90° transmission-scattering method (NIR LED, 860 nm) — compensates for light source and detector variations and contamination-induced attenuation for stable measurements.
• Wide measurement range with 4-range automatic switching: Kaolin 0–1000 degrees / Formazin 0–2000 NTU / PSL 0–100 degrees — from low to high turbidity without manual range selection.
• Accuracy ±2% of reading; repeatability ±2% of reading or ±0.04 degrees, whichever is larger.
• Two isolated 4–20 mA DC outputs (max. 900 Ω); arbitrary output range setting within measurement range.
• Six contact outputs: R1/R2 (SPST 1a, 250 V AC 3 A) — upper/lower alarm, cleaning, auto-calibration; R3 (SPST 1a, 30 V DC 1 A) — alarm or cleaning; FAIL (SPDT 1c) — error alarm; RANG1/RANG2 (SPST 1a, 30 V DC 1 A) — transmission range status output.
• Four contact inputs for external zero calibration, cleaning command, transmission hold, and 4-range selection.
• RS-485 2-wire communication.
• Optional electric wiper cleaning (cycle 0.1–168 h; cleaning time 30–600 s).
• Optional automatic zero calibration via filtered clean water (cycle 1–999 h).
• IP65 (IEC60529 / JIS C0920); pole (50 A) or wall mount; aluminium alloy housing; SUS304 fittings and hood; −20 to 55 °C.
• CE marked: EN61326-1 Class A, EN61010-1, RoHS EN50581; FCC Part 15 Class A.

Applications

The HU-200TB-W is suited to continuous turbidity monitoring at river water intake points, water treatment plant sedimentation and filtration tanks, industrial process water monitoring, and environmental water quality surveillance — particularly where turbidity fluctuates widely and automatic range switching and automated cleaning are needed for reliable long-term measurement.

Installation and Safety Notes

Mount converter on a 50 A pole or wall. Power: 100–240 V AC ±10%, 50/60 Hz, 35 VA max. (with automatic cleaner connected). Install SS-120-W detector via Rc3/4 threaded bore; sample water temperature 0–45 °C; pressure 0–0.3 MPa. Standard sensor cable: 5 m. When sensor, transmission, or contact input cables are extended to 30 m or more, the CE marking surge test does not apply — fit appropriate surge absorption elements. Operating temperature: −20 to 55 °C; humidity: 5–90% RH non-condensing.

Technical Specifications — Converter (HU-200TB-W)

Technical Specifications — Detector (SS-120-W)