EXTECH SD910 3-Channel DC Voltage Datalogger (300~3000mV)

DC current: 300~3000mV ±(0.5% + 2mV)
Memory: Approx. 2.7M readings using 4GB SD memory card
Dimensions: 132 x 80 x 32mm
Weight: 199g
Datalogger date/time stamps and stores readings on an SD card in Excel format for easy transfer to a PC
User can select the data sampling rate: 2, 5, 10, 30, 60, 120, 300, 600 seconds or Auto
Accessories: omplete with six AAA batteries, SD memory card, Univeral AC Adaptor with multi-plugs (US, EU, UK, AUS), 3 input connect sockets, and mounting bracket

Datasheet

Manual