Profile: Precision Sensing Devices, Inc. is a supplier of optical equipment. Our products include single fiber transmission probes, diffuse reflectance probes, single pass transmission probes, flow-through transmission cells, pneumatic extractors. Our single fiber transmission probe diameters from 1/4" to 1" and length up to 18". The collimated beam of this probe provides transmission capabilities. Our diffuse reflectance probe diameters from 1/2" to 1" and length up to 18". This probe is provided with an integral bifurcated fiber optic assembly. One branch is for transmitting and the second branch is for receiving energy.