The ultraviolet ray probe

Description

The ultraviolet ray sensor uses a photodiode which possesses a spectral response in the ultraviolet range. This photodiode produces a voltage which his linear with light intensity.

Use

This probe is extremely rapid and sensitive. If you measure the light intensity of a lamp connected in a wall outlet (60 Hz), the probe will sense the luminosity variations caused by voltage variations. The use of a filter is strongly recommended for such experiments. $ 4.6.6

Because of its design, this probe is very directional. Aim it directly at the light source.

To modify its range, flip the switch located at the extremity of the probe.

Calibration

Before calibrating the sensor, determine the operational range which you intend to use in the experiment. It is important to re-calibrate the instrument if you change its range of operation.

The first value is always 0 volt and it corresponds to a luminosity unit of 0.

The second value is 5 volts and corresponds to the following:

 
  • Lux

  • Foot-candle

  • Range 1 667 lx
  • 1,667

  • 154.87

  • Range 18,333 lx
  • 18,333

  • 1703.2

  • Range 1,668 333 lx
  • 1,668,333

  • 154,993

  • Maintenance

    Wipe transparent tube with a soft cloth. Do not submerge in liquid.

    Experiment suggestions

    Ozone Measure the variation of the intensity of ultraviolet rays during a day.

    Cloud Determine the effects of a cloud passing through over the intensity of ultraviolet rays.

    Technical specifications

     
  • 0 to 1,667 lx
  • Operational range
  • 0 to 18,333 lx
  •  
  • 0 to 1,668,333 lx
  • Size of sensor (surface)
  • 2.3 mm x 2.3 mm
  • Spectral response
  • 190 to 520 nm
  • Maximal response at
  • 440 nm
  • Sensitivity at 560 nm
  • 0.12 A/W
  • Response time 10 µs

    Schematics