Keithley Instruments GmbH DMM6500 CAL D

Fluke (UK) Ltd FLUKE-289/FVF

Velleman DVM630

National Instruments 778274-01/960450-04

Keithley Instruments GmbH 2000/E

GW Instek GDM-9061

Velleman AVM360

FLIR Systems Ltd DM90-NIST

Fluke (UK) Ltd FLUKE-87-5

Yokogawa Electric DM7560-3-D/C2