Historical clue formulations

• Current device — 2019-02-07
• Current measurer — 2018-08-16
• Electric gauge — 2008-12-17
• Current measurer — 2008-10-16
• Current gauge — 2008-04-06
• Current contraption — 2006-03-05
• Current gadget — 2002-05-04
• It goes with the flow — 1995-07-07
• Current calculator — 1995-01-07
• Current instrument — 1994-09-16