The logger is independent and does not require long cables to be used

Measures and records CO2 in buildings and other non-condensing environments

This logger also has an internal temperature sensor to log ambient temperatures

plus an external temperature sensor with a 6-inch cable

The popular and affordable water level logger U20L gets a sequel: MX20L now supporting bluetooth together with a number of improvements

HOBO UX90-004 Motor På/Av The logger is independent andDetects On Off states of motors within an AC magnetic field, using internal sensors or mechanical dry contact closures. The logger works great for monitoring the usage and operating times of motors, pumps, compressors and other similar equipment, especially where power supply contacts cannot be accessed. Requires HOBOware software and a USB cable (cable included with purchase of HOBOware on USB stick).