12 SpectraPen SP 110 Photon Systems Instruments Categories Crops , Photosynthesis, Chlorophyll & Respiration Brochure Send Enquiry Overview PSI SpectraPen SP 100 a handheld, programmable spectrophotometer that provides instant readings and spectral lines on interactive touch screen. Applications include visible light source testing, color measurement and chemical measurement. Back Our Related Products OptiSciences CCM-300 Chlorophyll Content Meter Learn More Photon Systems Instruments Large-Scale Photobioreactors Learn More PP Systems Insect Respiration Chamber Learn More Photon Systems Instruments Photobioreactor FMT 150 Learn More