In many areas, the quality and quantity of optically transparent materials are assessed using various optical monitoring systems based on output optical signals. These methods are diverse and cover a wide range of applications. However, continuous improvement is necessary to enhance their sensitivity, accuracy, compactness, and cost-effectiveness. Researchers are actively working on these advancements, particularly for remote monitoring of harmful substances in real time, where further refinements are also needed. TelemonitoringTelemonitoring has made significant progress in recent years due to the growing demand for efficient real-time data collection in various fields, from environmental monitoring to healthcare. This paper presents a specially developed spectrophotometric silicone photodetector. An algorithm was created to analyze the photodetector’s current and voltage measurements in the LabVIEW software environmentEnvironment. A software package was designed for online investigation of the spectral dependence of photosensitivity. An additional analysis was performed in the Excel software environmentEnvironment to validate the results, where a high-accuracy match of characteristics was obtained. A prototype of a spectral telemetry device was designed and manufactured, incorporating the Arduino Mega platform controlled by a microcontrollerMicrocontroller to analyze the photodetector’s output signal. The prototype was tested using LEDs of different colors, and the spectral intensity dependence was displayed on a screen using a novel approach. This innovative method opens new possibilities for the advancement of microspectrophotometrySpectrophotometry.