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 Skye Instruments SKU430 UVB sensors Learn More Qubit Systems Q-G265 Flow Monitor 2 L Learn More Photon Systems Instruments Magnetic Stirrer Learn More PP Systems CPY-5 Canopy Assimilation Chamber Learn More