Light Sources

Hansatech Instruments light sources have been designed to accompany the range of oxygen electrode chambers and control units in order to allow optimum performance and repeatability of measurements of photosynthesis and respiration. Light sources are positioned either directly or connected via fibre-optic cables to optical ports on the electrode chambers ensuring optimum sample illumination.

Hansatech Instruments LED light sources provide red illumination centered on 650nm with an HBW (Half Band Width) of ± 25nm which is automatically controlled via the Oxylab+ control unit. LED’s have the advantage of low heat output, rugged construction, long life, intensity adjustment without the need for optical filters and a fast rise to full intensity (milliseconds) negating the need for electronic shutters in fast fluorescence work.

The LS2 high intensity white light source contains a cooling fan, infra-red reducing “Hot mirror” and optics to provide light with minimum variation of intensity across the beam and little divergence from parallel. Automatic intensity control is not possible with the LS2. Attenuation of the light intensity is achieved by placing combinations of neutral density filters across the beam.

  • LED1 light source

    • High-intensity probe type light housing with single LED light source
    • Available in 3 colours: LED1/W (white – 4100K), LED1/B (blue – 470nm) & LED1/R (red – 627nm)
    • Compatible with DW2/2, LD2/3 & DW3 (with suitable adapter) electrode chambers
    • Max. intensity up to 2,000 µmol m-2 s-1 in DW2/2
    • Requires Oxylab+ control unit for calibration & automatic control of intensity changes.
  • LH36/2R LED light source

    • High-intensity light housing with 36 red LED’s centred on 650nm
    • Compatible with DW3, LD1/2 & LD2/3 electrode chambers
    • Max. intensity up to 900 µmol m-2 s-1 in DW3 & 750 µmol m-2 s-1 in LD1/2 & LD2/3
    • Requires Oxylab+ control unit for calibration & automatic control of intensity changes.
  • LS2 white light source

    • High intensity 100W tungsten-halogen light source (50W option available)
    • Max. intensity up to 1,800 µmol m-2 s-1 in DW1, DW1/AD & LD1/2 electrode chambers
    • Max. intensity up to 8,000 µmol m-2 s-1 in DW2/2, DW3 & LD2/3 electrode chambers using LS2/FO & A8 accessories
    • Integral optics provide minimum intensity variation across beam & little divergence from parallel
    • Integral infrared reducing Hot-Mirror filter
    • Mains powered stabilised power supply
    • Mounting slots allowing addition of filters for intensity attenuation or spectral modification.