UviLux Tryptophan

Highly sensitive UviLux Tryptophan fluorometer for real time detection of Tryptophan-like fluorescence (TLF), an indicator of bacterial contamination.

• Sensitive beyond ppb level
• Ideal tool for detecting sewage contamination

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Chelsea's biological sensing instruments measure the productivity of phytoplankton for climate research, algae and FDOM for ecology monitoring, bioluminescence for dinoflagellate detection and bacterial contamination detection in aquaculture

UviLux Tryptophan Overview

Building upon years of research into the measurement of water quality using UV fluorometers, the UviLux Tryptophan is a highly sensitive, robust sensor designed for detecting and monitoring tryptophan in natural and process waters, giving an indication of bacterial contamination and overall water quality. Sensitive beyond ppb level, the UviLux Tryptophan fluorometer is an ideal tool for detecting sewage contamination.

UviLux Tryptophan Features

  • In-situ, real time monitoring of Tryptophan
  • Highly sensitive readings to 0.03 ppb
  • Couple with FDOM sensor to remove environmental interference
  • Easy to integrate with monitoring platforms and systems, or combine with Hawk for on the spot readings and logging
  • Depth rated to 1000m
  • Excellent turbidity rejection and high ambient light rejection
  • Service and support from dedicated technical team


  • Real time monitoring of sewage contamination in rivers and lakes
  • Bacterial contamination monitoring in groundwater
  • Assessment of overall water quality in catchments and natural waters
  • In situ bacterial contamination monitoring for shellfish aquaculture
  • Detection of bacterial contamination in process waters


UviLux Tryptophan Specifications

Parameters Tryptophan
Sensitivity (QSU) 0.01
Calibrated range (QSU) 600
Example compound:sensitivity range (ppb) Tryptophan: 0.02 – 1200
BOD: 0.001 – 50 mg/L



Size Ø 70 mm x 149 mm
Weight in air 800 g in air / 150 g in water
Pressure housing Acetal C
Operating temperature -2 °C to + 40 °C
Storage temperature -40 °C to + 70 °C
Depth rating 1000 m
Connector Impulse MCBH6MP


Input voltage 9 – 36 V
Power requirements < 1 Watt @ 12 V

The sensitivity and calibrated range of each UviLux Tryptophan sensor has been standardised by cross-correlating each calibration solution against a certified reference standard of quinine sulphate using a bench-top spectrofluorometer.  Fluorescence is reported in Quinine Sulphate Units (QSU), where 1 QSU is equivalent to the fluorescence intensity recorded from 1 ppb quinine sulphate at an excitation wavelength of 347.5 nm and an emission wavelength of 450 nm. Factors are provided for selected compounds to convert the fluorescence output from QSU to ppb of the compound of interest

UviLux Tryptophan FAQs

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