US 12,066,309 B2
Variable area flowmeter, system comprising a variable area flowmeter and an external control unit, and method for operating a variable area flowmeter
Colin Dzieia, Bochum (DE)
Assigned to KROHNE Messtechnik GmbH, Duisburg (DE)
Filed by KROHNE Messtechnik GmbH, Duisburg (DE)
Filed on Oct. 24, 2019, as Appl. No. 16/662,147.
Claims priority of application No. 10 2018 126 790.8 (DE), filed on Oct. 26, 2018.
Prior Publication US 2020/0132525 A1, Apr. 30, 2020
Int. Cl. G01F 1/24 (2006.01); G01F 1/26 (2006.01); G01F 1/40 (2006.01); G02F 1/139 (2006.01)
CPC G01F 1/26 (2013.01) [G01F 1/40 (2013.01); G02F 1/1391 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A variable area flowmeter, comprising:
a float; and
a display unit, wherein the display unit comprises a mechanical pointer element,
wherein the pointer element is connected directly or indirectly to the float such that the pointer element is mechanically deflected by the float during a flow measuring process,
wherein the display unit additionally comprises at least one bi-stable display, requiring energy supply only in order to modify a displayed representation or to restore the displayed representation, and
wherein the at least one bi-stable display displays a first representation during operation, wherein the first representation comprises at least one scale dependent on the flow measuring range,
wherein the displayed scale is modified depending on at least one further process parameter being measured, wherein the further process parameter is at least one of pressure, temperature, or type of measuring medium.