AB100 波長・光路・検出器の選定

カテゴリ：AB100 光吸収

吸収、色度、濁度向けの選定基準です。

Work backward from the target parameter

AB100 uses UV-visible-near-infrared absorption. First confirm whether the target is SAC254, a COD-related indicator, color, turbidity, nitrate or another parameter with a distinguishable absorption feature, then assess background interference and the reference method. The deliverable list must be confirmed against the model and sample.

  • Stable, distinguishable absorption: confirm the corresponding wavelength or band
  • High absorption or concentration: generally evaluate a shorter path to avoid saturation
  • Low absorption: consider a longer path while checking fouling and linearity

Wavelength, path length, source and detector

Wavelength affects selectivity, path length affects sensitivity and linearity, and the source/detector modules determine spectral coverage and signal-to-noise. Do not select only by the phrase ‘multi-parameter’; submit target, range, turbidity, flow and cleaning conditions together.

  • For high turbidity or suspended solids, check reference wavelengths, dual/multi-wavelength compensation and cleaning
  • Source and detector modules project beyond the pipe body, so reserve service and venting space
  • For unknown samples, run a spectral or site test before fixing the algorithm and detector

Installation and validation boundaries

Depending on the model, evaluate immersion probes, pipe flow cells or in-situ fiber probes. Keep the optical window continuously exposed and control bubbles, deposits and fouling. Compare synchronized samples with the laboratory method at several points; do not judge accuracy from one reading.

  • Confirm pipe size, flow, full-pipe condition, isolation and cleaning-fluid compatibility
  • Record sample temperature, turbidity, sampling time, path length and cleaning state
  • Final range, algorithm, accuracy and hazardous-area applicability follow the model technical file

よくある質問

Can AB100 measure every water-quality parameter at the same time?

No. Measurable parameters depend on the target spectrum, wavelength/path length, detector module and application model. Confirm the project list with the specific model and representative samples.

Will simply increasing the path length solve high turbidity?

Not necessarily. High turbidity introduces scattering, window fouling and bubble effects; path length, reference or compensation model, flow and cleaning must be evaluated together.