signal acquisition module

A signal acquisition module sits between your sensors and the central logger or cloud gateway. Its job sounds simple: read analog or digital inputs, condition the signal, and send clean data upstream. But in geotechnical and structural health monitoring, that simplicity breaks down fast. Sensor outputs span microvolt ranges from strain gauges to millivolt-level thermocouples to frequency signals from vibrating wire instruments. Electrical noise from nearby pumps or radio equipment can swamp those signals. And field conditions—condensation, temperature swings, cable runs over 100 meters—introduce errors that a benchtop DAQ never sees. Kingmach’s signal acquisition modules address these headaches with galvanic isolation on every input channel, software-selectable gain and filtering, and support for common sensor interfaces: full-bridge, half-bridge, voltage, current loop, vibrating wire, and digital protocols like RS-485. The front end uses 24-bit delta-sigma ADCs that capture microvolt-level changes even when the site is electrically noisy. We’ve also baked in sensor excitation options—constant current for IEPE accelerometers, regulated voltage for thermistors, and swept-frequency excitation for vibrating wire sensors. Each channel can be configured independently, so a single module handles mixed sensor strings without external signal conditioners. From a deployment standpoint, the module is built around DIN-rail mounting and pluggable terminal blocks. Field wiring mistakes happen, so we added screw-terminal guards and clear labeling. Power options range from 9–36V DC, covering both battery and solar setups. Data output defaults to Modbus RTU, with configurable baud rates up to 115200, making it straightforward to integrate with existing SCADA or custom Linux-based loggers. Our technical team can pre-configure modules to match your sensor inventory before shipment, which cuts setup time on the hill by half or more.