The HOBO U12-013 data logger has a built in temperature and relative humidity sensor along with 2 external channels for a wide range of energy and environmental sensors. This product can store up to 43,000 measurements of 12-bit resolution readings.

The Anti-fouling Protective Guard can be used in place of the standard protective guard for protection against fouling during deployment. The anti-fouling guard uses copper windings to reduce bio-fouling, while still allowing good water flow to the sensor.

The HOBO Pro v2 Temperature/External Temperature data logger is a weatherproof data logger with an external soil/water temperature sensor on a 6-foot cable useful for situations where just one temperature probe is required. An internal temperature sensor is also included.