Single-channel readout units are portable instruments designed for manual data acquisition from geotechnical and structural sensors, ensuring operational simplicity, reliability, and fast field use. Unlike traditional universal readout devices, GESTECNO single-channel units are factory-configured for reading a specific type of analog signal (vibrating wire, 4–20 mA, 0–10 V, mV/V, potentiometric), providing a dedicated, optimized, and ready-to-use solution for each application. The ability to display output signals directly in engineering units significantly simplifies measurement operations, eliminating the need for complex configuration and reducing the risk of operator error, making the instrument suitable even for non-specialized personnel. These readout units are ideal for manual measurement campaigns, non-continuous monitoring, and field verification activities, especially in systems composed of homogeneous sensors, where a dedicated solution is more efficient and cost-effective than a universal unit. Thanks to their compact design, battery power supply, and ease of use, GESTECNO single-channel readout units represent a practical and reliable solution for all field monitoring operations.