||A seven channel general purpose data logger designed for applications in soil science, plant physiology, agronomy, climate research and meteorology, horticulture, agriculture, turf and gardens-amenity landscaping. It primarily measures water content, moisture, temperature and electrical conductivity. Operation is by initial installation of software and data logging of the sensor readings. Key characteristics are high accuracy with logging capability up to 600,000 readings and use of the DeltaLINK-Cloud data viewing and sharing service. The GP1 can record to two differential analogue voltages, two temperature channels, two pulse counters and a Plus 1 Delta-T WET sensor. The GP1 provides the logging engine for the WS-GP1 Weather Station. The logging frequency is 1 second to 24 hours. Typical voltage accuracy is +/- 0.3 mV + 0.01% reading. Temperature accuracy is +/- 0.07 degC. Soil moisture accuracy is +/-0.06% (+/-0.0006 m3.m‐3).