The OSK4028A-LR is a miniature sensor module from Optosupply. It is a dual beam, low-power optical sensor designed for fast and accurate sensing applications. The module can detect both visible and near infrared ("NIR") light sources, including LED, halogen, and incandescent lamps. It consists of an optical sensor, pre-amplifier, and a dual beam optical assembly. The module has an integrated digital signal indicator output for low-level signal detection and can be used in combination with a PC connection to connect to a PC or other computer system. The OSK4028A-LR is suitable for environmental, exploration, industrial, and medical applications.