SPAR: Irradiance

The SPAR is used to measure and record the activation of photosynthesis in fresh and salt water (radiation with wavelengths between 400 nm and 700 nm).

 Flat LI-cor sensor

 Light and compact

 Wireless fast configuration and data collection


Features and benefits

  • SPAR enables to measure and record active radiation for photosynthesis in fresh and salt waters (radiation with wavelengths between 400nm and 700nm).
  • The amount of light energy received is expressed in µmol.m-2.s-1
  • SPAR is available in 2 versions:
    with a flat LI-cor sensor
    with a spherical LI-cor sensor
  • Easy to deploy:
    Light and compact
    Fast wireless configuration and data collection thanks to a communication interface (Inductive Data Pencil) connected to the USB port of a PC using Winmemo software

  • Examples of use

  • Active radiation for photosynthesis in fresh and salt waters
  • Sensors

  • Radiation in air channel
  • Radiation in shallow water channel
  • Radiation in deep water channel
  • Technical data

  • Maximum depth: 300m
  • Operating temperature: -10°C / 45°C
  • Time: internal clock with calendar, clock drift 1min/month
  • Sampling rate: programmable from 1 second to 99 hours
  • Autonomy:
    Memory: 1Mo with data compression
    Energy: 12 000 days (depending on sampling rate)
  • Radiation in air channel:
    Measurement range: 0 – 2000 µmol s-1 m-2
    Rsolution (12 bits): 0.5 µmol s-1 m-2
  • Radiation in shallow water channel:
    Measurement range: 0 – 100 µmol s-1 m-2
    Resolution (12bits): 0,024 µmol s-1 m-2
  • Mechanical features:
    Housing: tube in plastic (cap in Ketron)
    Dimensions: housing Ø40 x 183 mm (probe Ø 5x 130 mm)
    Weight in air: Flat SPAR: 641 g / spherical SPAR: 588g