Introducing the P4SPR: an ultra-compact and portable solution for precision analysis. This user-friendly device offers highly specific and versatile detection capabilities, from static to real-time measurements, all without the need for detection labels. The P4SPR is not only cost-effective and simple to use, but also incredibly compact and easy to transport, making it the perfect tool for researchers across various fields. With a wide concentration range, this device is suitable for a variety of applications, from protein quantification to environmental testing, and can be easily taken on-the-go for fieldwork or remote research.