The OS1p is a highly portable and cost effective modulated chlorophyll fluorometer ideal for fast measurements and stress evaluation. Designed for light adapted yield and ETR measurements as well
as dark adapted Fv/Fm plant stress measurement. When there is a great deal of field work to be done,
this comprehensive yet portable workhorse is an excellent choice.

• Great for detecting stress causing agents that effect photosystem PSII.
• The OS1p provides direct readout of FV/Fm, Fm, and Fo, as well as Yield (or ΔF/Fm’), Fs(or F), Fms (or Fm’) the most used, and most robust stress measurement parameters.
• Both PAR and leaf temperature measurements are possible as well with the Optional digital Par Clip.
• Flexible fiberoptic probe allows greater measurement flexibility.
• Almost an ulimited number of measurements can be sored on the OS1p's large internal memory and its removable SD memory storage modules.  Data transfer and software updates are easily handled with its built-in USB interface.