portable data loggers

Kingmach Measurement & Monitoring Technology Co., Ltd. builds portable data loggers for geotechnical and structural health monitoring. The loggers work with a broad range of sensors: vibrating wire, resistive strain gauges, linear potentiometers, thermistors, and voltage-output sensors (0–5 V, 0–10 V, 4–20 mA). This means one device can handle readings from piezometers, load cells, tiltmeters, and settlement profiles on a single site visit. Inside the weatherproof ABS or aluminum enclosure, a 24-bit ADC ensures low-noise data acquisition. Sampling rates from 0.1 Hz to 10 Hz cover slow-changing groundwater levels and faster dynamic strain measurements. For example, when monitoring a tunnel lining, you may need to capture strain as trains pass—1 Hz is often enough; for slope creep, logging every minute or hour works fine. Storage is handled by an internal 8 GB SD card (upgradable). Data records carry timestamps with an accuracy of ±1 second per day if synced before deployment. A typical field session generates about 5 MB of CSV data per day on eight channels, so a filled card lasts for months. Connectivity is straightforward: USB-C for data download and charging, and a 9-pin D-sub terminal block for sensor inputs. The logger can be powered by its internal rechargeable lithium battery (48-hour continuous use, or longer with sleep modes) or an external 12 V DC source for long-term campaigns. Kingmach offers customization on input channels (from 4 to 32), enclosure rating (IP65 or higher), and wireless modules (LoRa, 4G) for remote data retrieval. The firmware supports known thermistor curves (YSI, Steinhart-Hart) and can apply calibration coefficients on-the-fly. Data is exported as CSV or SVG for direct import into analysis software. Standard delivery includes a calibration report, USB cable, and a sturdy transport case. Technical support extends from pre-purchase sensor compatibility checks to on-site training if needed.