We’ve used this 12VDC auto adapter set to 5VDC and a portable 12VDC NiCad car starter to run both the TIM10 Desktop CO2, Temperature & Humidity Monitor and the TIM12 Air Quality Monitor with data logging.
With this configuration, it is easy to take the TIM10 or TIM12 outdoors to measure CO2 for classroom projects, for example.
This adapter (unlike less-expensive ones) is rated at 1000mA…most others are not. No wiring required – the adapter comes with different plugs – just remember that the center pin is positive. Also works great in cars or anywhere you have access to a lighter plug.