The PS-3S (Q) with Electrode holder is an electronic part manufactured by Omron for use in their level controller 61F series. It features a built-in amplifier with a high power output, allowing it to detect and make contact with low-resistance minerals. It is designed for use in environments with high levels of dust, dirt, and moisture as it is resistant to corrosion and has a durable, impact-resistant construction. Additionally, it has an easy-to-use terminal block, allowing for quick connection to the controller. Finally, it has a compact size that takes up less space in the system.