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 Soil Moisture Complete G2 Series Grommet Kit Learn More Hansatech Instruments CL-01 Chlorophyll Meter Learn More Qubit Systems Q-P103 Gas Pump 1LPM Learn More Qubit Systems S129 Methane Analyzer 500ppm Learn More