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Aquaread

Rhodamine WT Dye Electrode

The Aquaread Optical Rhodamine WT Dye Electrode is a highly sensitive digital sensor engineered to track and measure Rhodamine WT fluorescent tracer dyes in situ. Operating on the principle of narrow-band fluorometry, the sensor projects a targeted excitation light beam at 525 nm directly into the water column. The sub-surface Rhodamine dye molecules absorb this energy and instantaneously emit a shifted fluorescent signal, which the sensor isolates and measures through a tightly filtered 575 nm to 650 nm window to determine parts-per-billion concentrations

What this electrode offers over competitive tracer sensors is its direct, plug-and-play integration within Aquaread’s modular multi-parameter ecosystem. Equipped with ultra-hard, optically polished sapphire windows instead of standard resin or glass lenses, the sensor eliminates calibration drift caused by grit abrasions during high-velocity flow testing. Biofouling and sediment mitigation are tailored as system choices; while entry-level configurations on AP-LITE, AP-2000, and AP-5000 probes operate as static arrays for manual grab sampling, the electrode natively aligns with the motorized central wipers standard on the heavy-duty AP-6000 and AP-7000 platforms for continuous, unattended field logging.

Key Features

  • Tracer-Specific 525nm Tuning: Targets the exact excitation peak of Rhodamine WT dye, preventing false positives from common background factors like ambient daylight, turbidity, or organic matter.
  • Dual Auto-Ranging Precision: Automatically toggles between a sub-decimal 0.0 to 99.9mµg/L scale and a broad 100  to  500mµg/L range to handle subtle dispersion tracking alongside concentrated dye injections.
  • Abrasive-Resistant Sapphire Optics: Premium sapphire windows protect internal optical paths from micro-scratches during high-sediment river tracing or industrial pipe profiling.
  • Flexible Anti-Fouling Integration: Functions as a static sensor within entry-level assemblies or pairs directly with the automated motorised mechanical cleaning wipers built into the AP-6000 and AP-7000 probe bodies.
  • Universal Auxiliary Adaptability: Threads directly into the standard auxiliary optical ports of all modular Aquaprobes, removing the need for single-parameter logger electronics or standalone field gear.

Applications

  • Surface Water Hydrological Tracing: Mapping active flow paths, dispersion patterns, and mixing zones within rivers, reservoirs, and natural streams.
  • Groundwater Aquifer Mapping: Conducting time-of-travel and direction studies within subterranean water tables, karst formations, and fractured rock matrices.
  • Wastewater Retention Studies: Verifying hydraulic retention times (HRT) and tracking short-circuiting routes inside wastewater treatment settling basins.
  • Industrial Pipeline Leak Detection: Injecting tracer dye loops into closed municipal or industrial fluid conduits to locate structural faults and unpermitted discharges.
LITE-RHOD

LITE-RHOD

AP-LITE Rhodamine WT Dye Optical Electrode with 2 Auto-Range scales 0-99.99µg/L  or 100-500µg/L. Minimum Level of Detection 0.1 µg/L, Minimum Level of Repeatability 5.0 µg/L

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2000-RHOD

2000-RHOD

AP-2000 Rhodamine WT Dye Optical Electrode with 2 Auto-Range scales 0-99.99µg/L  or 100-500µg/L. Minimum Level of Detection 0.1 µg/L, Minimum Level of Repeatability 5.0 µg/L.

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5000-RHOD

5000-RHOD

AP-5000 Rhodamine WT Dye Optical Electrode with 2 Auto-Range scales 0-99.99µg/L  or 100-500µg/L. Minimum Level of Detection 0.1 µg/L, Minimum Level of Repeatability 5.0 µg/L.

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7000-RHOD

7000-RHOD

AP-7000 Rhodamine WT Dye Optical Electrode with 2 Auto-Range scales 0-99.99µg/L  or 100-500µg/L. Minimum Level of Detection 0.1 µg/L, Minimum Level of Repeatability 5.0 µg/L.

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