GlowTracka bioluminescence sensor

Detect bioluminescence from dinoflagellates and similar organisms with the Glowtraka bioluminometer. Originally developed by Plymouth Marine Laboratory in the UK, Glowtracka is a robust and sensitive detector primarily used for the assessment of bioluminescent algae within the marine environment.

GlowTracka’s precision flow meter stimulates bioluminescent organisms – principally dinoflagellates. The instrument measures the light flashes as the organisms pass the detector, giving photon level sensitivity. GlowTracka is highly flexible in its deployment options, including moorings, profiling (with pumped system) or deployment in towed vehicles.

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Detect bioluminescence from dinoflagellates and similar organisms with the Glowtraka bioluminescence sensor

Features & Applications


  • Highly sensitive bioluminometer
  • Small and rugged for ease of integration within wider systems
  • Low power consumption
  • Interface for flow sensor


  • Biomass studies
  • Bioluminescent species abundance
  • Harmful algal bloom detection
  • Toxic algae bloom tracking


Type Flow-through (28 mm internal pipe diameter)
Optical viewing Transverse to flow
Detector Photodiode (100 sq mm)
Irradiance detectivity 10 picowatt at 560nm over z.f. -50Hz (-3dB)
Relative responsivity 400nm: x0.4; 600 nm: x1.1; 700 nm: x 1.3 (n )
Power requirement 6 to 25 V (40 mA at 12 V nominal); fully insulated from all outputs via DC-DC converter
Grounding All circuitry DC isolated from chassis
Signal outputs All 1 Volt full-scale, 0.5-ohm source resistance, > 10 kilohm load, (z.f. -50Hz)
Flow meter input Zero-crossing required, from +/-5 mV to +/- 100 V; 500 Hz full-scale, other scalings as factory option
Depth capability 1000 m
Dimensions Ø 112.5 mm; 152 mm length
Weight (approx.) 2.4 kg in air
Connector Impulse LPMIL-4 FS

Flow Meter

Flow speed range 68 to 680 LPM
Internal diameter 38 mm
Size 60 x 12 x 12 mm
Output Sine wave output proportional to flow rate. 30 mV peak/peak at 10% flow range.1000Hz at fall flow
Bootstrap Modal