Lascar EL-USB-3 USB Datalogger Voltage
Lascar EL-USB-2+ Relative Humidity and Temperature Data Logger
Lascar EL-USB-2-LCD+ Relative Humidity and Temperature Data Logger
Voltcraft MS-410 Magnetic Field Tester
Uni-t Pocket Size Digital Multimeter Ut20b
Buy Voltage Measurement Kit from LogIT – including the voltage adaptor with standard 4mm sockets and a probe and cable set with a wide range of connectors and probes.