HOBO* Dissolved Oxygen Data Logger, Measure oxygen concentrations in lakes, streams, rivers, estuaries, and coastal waters, Oxygen Accuracy: +/-0.2 mg/L up to 8 mg/L, Temperature Accuracy: 0.2 Deg C, Depth Rating: 100 m
HOBO* Water Level Data Logger, low-cost, research-grade water level data logger for continuously measuring water level and temperature in a wide range of underwater environments, 0.1% measurement accuracy, Depths up to 30 feet
HOBO* Water Level Data Logger, low-cost, research-grade water level data logger for continuously measuring water level and temperature in a wide range of underwater environments, 0.1% measurement accuracy, Depths up to 13 feet
HOBO* Water Level Data Logger, low-cost, research-grade water level data logger for continuously measuring water level and temperature in a wide range of underwater environments, 0.1% measurement accuracy, Depths up to 100 feet
TidbiT v2 Water Temperature Data Logger, provides 12-bit resolution and has +/- 0.2 Deg C accuracy, Onset's smallest temperature data logger, Waterproof to 300 meters (1,000 feet), designed for outdoor and underwater environments