Last update 25 JUL 2022

Litemeter Current PAR

Litemeter Current PAR is a silicon pyranometer with a filter for Photosynthetically Active Radiation (PAR) – the wavelength of light plants used in photosynthesis. It can be used outdoors, in greenhouses, in water or in growth chambers. Ideal for use in floriculture, agriculture and biology.

There are similarities between the photovoltaic phenomenon and the ‘light-dependent reaction’ of photosynthesis. The Sun is the primary energy source. Electrons jump in the upper atmosphere when hit by the Sun’s rays.

Thanks to a dedicated filter, a PAR meter measures the spectral portion of the light in the 400-700nm range along a planar surface which corresponds to the PAR (Photosynthetically Active Radiation). This is the precise wavelength on which plants photosynthesize.

The measure of PAR along a flat surface is called PPFD or PARMETER in experimental growth chamber for algae “Photosynthetic Photon Flux Density”. It differs from “Photosynthetic Photon Flux Fluence Rate” (PPFFR) which is revealed by spherical sensors of PAR.

Litemeter Current PAR measures PPFD. It can be used outdoors, in greenhouses, in water or in growth chambers.

Output is in current loop and values can be easily converted in µmol of photons per square meter per second (µmol /(m² * s) ) S.I. Units.

The price is competitive and makes the “precision / price” ratio very interesting.

Calibration

Calibrated for comparison with our silicon reference cell calibrated periodically by the Dakks accredited ISFH Institute and a multimeter HP34410A with over 0.2% accuracy.

Most common uses

Detecting electromagnetic radiation in photosynthetic wavelengths (400-700nm) is useful for monitoring research and economic production activities where biological growth is important. For example:

• Intensive agriculture
• Floriculture
• Fruit growing
• Algal growth
• Aquariums
• Marine biodiversity studies