9026 — Instruments and apparatus for measuring or checking the flow, level, pressure or other variables of liquids or gases (for example, flow meters, level gauges, manometers, heat meters), excluding instruments and apparatus of heading 9014, 9015, 9028 or 9032
Build a route: origin → entry into the EU → destination, and see the measures that apply along it.
EU customs measures (TARIC)
Data updated: 2026-08-08 · Indicative – only the official sources (TARIC) are binding.
Measure type
Origin / area
Duty
Validity
Source
Airworthiness tariff suspension
ERGA OMNES
0 %
2008-01-01
SE_TULLVERKET
Export control
All third countries
—
2025-01-02
SE_TULLVERKET
Export control
Belarus
—
2025-02-25
SE_TULLVERKET
Export control
Russian Federation
—
2025-02-25
SE_TULLVERKET
Export control
Ukraine
—
2025-02-25
SE_TULLVERKET
Import control
Belarus
—
2025-02-25
SE_TULLVERKET
Import control
Russian Federation
—
2025-02-25 – 2026-12-31
SE_TULLVERKET
Third country duty
ERGA OMNES
0 %
2001-01-01
SE_TULLVERKET
Documents & conditions (EU)
The full set of EU document conditions for this code. Which ones actually apply depends on the specific measure and the origin of the goods — pick what applies to your consignment.
Import scenario.
Code
Document / description
Source
A119
Airworthiness certificate or declaration in the commercial invoice containing the elements of the airworthiness certificate issued or a document annexed to the invoice
EU from feed SE_TULLVERKET
L142
Import authorisation by virtue of article 3i paragraph 3c of Council Regulation (EU) 833/2014
EU from feed SE_TULLVERKET
L143
Import authorisation by virtue of article 12b.2 of Council Regulation (EU) 833/2014
EU from feed SE_TULLVERKET
L152
Import authorisation by virtue of article 1ra paragraph 10 of Council Regulation (EU) 765/2006
EU from feed SE_TULLVERKET
L154
Import authorisation by virtue of article 8da paragraph 2 of Council Regulation (EU) 765/2006
EU from feed SE_TULLVERKET
L156
Import authorisation by virtue of article 3i paragraph 3f of Council Regulation (EU) 833/2014
EU from feed SE_TULLVERKET
X802
Export authorisation by virtue of paragraphs 1 and 3 of Article 2e of Council Regulation (EU) No 692/2014
EU from feed SE_TULLVERKET
X807
Export authorisation by virtue of article 1sa.7 of Regulation (EC) No 765/2006
EU from feed SE_TULLVERKET
X830
Export authorisation by virtue of article 3c.6 of Council Regulation (EU) 833/2014
EU from feed SE_TULLVERKET
X831
Export authorisation by virtue of article 3c. paragraph 6c of Council Regulation (EU) 833/2014
EU from feed SE_TULLVERKET
X832
Export authorisation by virtue of article 3c.6e of Council Regulation (EU) 833/2014
EU from feed SE_TULLVERKET
X834
Export authorisation by virtue of article 3k.5 of Council Regulation (EU) 833/2014
EU from feed SE_TULLVERKET
X837
Export authorisation by virtue of article 3k.5b of Council Regulation (EU) 833/2014
EU from feed SE_TULLVERKET
X838
Export authorisation by virtue of article 3k.5f of Council Regulation (EU) 833/2014
EU from feed SE_TULLVERKET
X839
Export authorisation by virtue of article 3c paragraph 6a of Council Regulation (EU) 833/2014
EU from feed SE_TULLVERKET
X840
Export authorization by virtue of article 5q paragraph 1 of Council Regulation (EU) 833/2014
EU from feed SE_TULLVERKET
X841
Export authorisation by virtue of article 3c paragraph 6f of Council Regulation (EU) 833/2014
EU from feed SE_TULLVERKET
X844
Export authorisation by virtue of article 1bb.8 of Council Regulation (EU) 765/2006
EU from feed SE_TULLVERKET
X850
Export authorisation by virtue of article 1sa.6a of Council Regulation (EU) 765/2006
EU from feed SE_TULLVERKET
X851
Export authorisation by virtue of article 1sa.7b of Council Regulation (EU) 765/2006
EU from feed SE_TULLVERKET
X852
Export authorisation by virtue of article 3k.5e of Council Regulation (EU) 833/2014
EU from feed SE_TULLVERKET
X985
Export authorisation by virtue of article 7 of Council Regulation (EU) 2022/263
EU from feed SE_TULLVERKET
Y227
The contract prohibits re-exportation to Russia and re-exportation for use in Russia – Article 12g paragraph 1 of Regulation (EU) 833/2014
EU from feed SE_TULLVERKET
Y228
The prohibitions defined in article 12g.1 of Council Regulation (EU) No 833/2014 do not apply (see contractual exemptions in article 12g.2 b)
EU from feed SE_TULLVERKET
Y229
Public contracts concluded with a public authority in a third country or with an international organisation - Article 12g paragraph 2a of Regulation (EU) 833/2014
EU from feed SE_TULLVERKET
Y230
Contract prohibits re-exportation to Belarus and re-exportation for use in Belarus – Article 8g paragraph 1 of Council Regulation (EC) No 765/2006
EU from feed SE_TULLVERKET
Y231
The prohibitions defined in article 8g.1 of Council Regulation (EC) No 765/2006 do not apply (see contractual exemptions in article 8g.2)
EU from feed SE_TULLVERKET
Y232
Public contracts concluded with a public authority in a third country or with an international organisation - Article 8g paragraph 3 of Council Regulation (EC) No 765/2006
EU from feed SE_TULLVERKET
Y718
The prohibitions defined in article 1bb.1 of Council Regulation (EU) No 765/2006 do not apply (see contractual exemptions in article 1bb.4)
EU from feed SE_TULLVERKET
Y719
The prohibitions defined in article 1bb paragraph 1 of Council Regulation (EU) No 765/2006 do not apply (see exemptions in article 1bb paragraph 7)
EU from feed SE_TULLVERKET
Y727
The prohibitions defined in article 1ra paragraph 1 of Council Regulation (EU) No 765/2006 do not apply (see exemptions in article 1ra paragraph 3)
EU from feed SE_TULLVERKET
Y728
The prohibitions defined in article 1ra paragraph 1 of Council Regulation (EU) No 765/2006 do not apply (see exemptions in article 1ra paragraph 4)
EU from feed SE_TULLVERKET
Y730
The prohibitions defined in article 1ra.1 of Council Regulation (EU) No 765/2006 do not apply (see contractual exemptions in article 1ra.9)
EU from feed SE_TULLVERKET
Y745
The prohibitions defined in article 1bb paragraph 1 of Council Regulation (EU) No 765/2006 do not apply (see exemptions in article 1bb paragraph 11)
EU from feed SE_TULLVERKET
Y833
The prohibitions defined in article 3k paragraph 1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in article 3k paragraph 4)
EU from feed SE_TULLVERKET
Y848
The prohibitions defined in article 3c.1 of Council Regulation (EU) No 833/2014 do not apply (see contractual exemptions in article 3c.5a)
EU from feed SE_TULLVERKET
Y850
The prohibitions defined in article 3i.1 of Council Regulation (EU) No 833/2014 do not apply (see contractual exemptions in article 3i.3ca)
EU from feed SE_TULLVERKET
Y851
The prohibitions defined in article 3i.1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in article 3i.3a)
EU from feed SE_TULLVERKET
Y859
Goods entered the territory of the customs union of the EU and presented to customs authorities prior to the entry into force or to applicability date of the present sanction, whichever is latest (see Article 12e of Regulation (EU) No 833/2014)
EU from feed SE_TULLVERKET
Y869
The prohibitions defined in article 1sa of Council Regulation (EC) No 765/2006 do not apply (see contractual exemptions in article 1sa.5)
EU from feed SE_TULLVERKET
Y870
Goods entered the territory of the customs union of the EU and presented to customs authorities prior to the entry into force or to applicability date of the present sanction, whichever is latest (see Article 8f of Regulation (EU) No 765/2006)
EU from feed SE_TULLVERKET
Y874
The prohibitions defined in article 3i.1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in article 3i.3aa)
EU from feed SE_TULLVERKET
Y983
The prohibitions defined in articles 2.1 and 4.1 of Council Regulation (EU) 2022/263 do not apply (see exemptions in articles 2.2 and 4.3)
EU from feed SE_TULLVERKET
Y984
Goods not originating from or not destined for the non-government controlled areas of Ukraine in the oblasts of Donetsk, Kherson, Luhansk and Zaporizhzhia
EU from feed SE_TULLVERKET
Y985
Export authorisation by virtue of article 7 of Council Regulation (EU) 2022/263
EU from feed SE_TULLVERKET
Y987
The prohibitions defined in articles 2.1 and 2a.1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in articles 2.3 and 2a.3)
EU from feed SE_TULLVERKET
Y990
Export authorisation by virtue of articles 2.4 or article 2a.4 and 2b.1 of Council Regulation (EU) No 2014/833
EU from feed SE_TULLVERKET
Y991
The prohibitions defined in articles 2.1 and 2a.1 of Council Regulation (EU) No 2014/833 do not apply (see contractual exemptions in article 2.5 and article 2a.5)
EU from feed SE_TULLVERKET
Y995
Goods other than those concerned by the prohibitions defined in articles 2.1 and 2a.1 of Regulation (EU) No 833/2014
EU from feed SE_TULLVERKET
Y997
Goods not originating from or destined to Crimea or Sevastopol (Articles 2 and 2b.1 of Council Regulation (EU) No 692/2014)
EU from feed SE_TULLVERKET
Y998
There are no reasonable grounds to determine that the goods are to be used in Crimea or Sevastopol (Article 2b.3 of Council Regulation (EU) No 692/2014)
EU from feed SE_TULLVERKET
Documents to choose between
These measures are answered with one document from each group — either the certificate, or a declaration that the act does not apply to the goods. Giving two from one group is a contradiction and customs rejects the entry.
Exactly one of:
All third countries
Y227
The contract prohibits re-exportation to Russia and re-exportation for use in Russia – Article 12g paragraph 1 of Regulation (EU) 833/2014
Y229
Public contracts concluded with a public authority in a third country or with an international organisation - Article 12g paragraph 2a of Regulation (EU) 833/2014
Exactly one of:
All third countries
Y227
The contract prohibits re-exportation to Russia and re-exportation for use in Russia – Article 12g paragraph 1 of Regulation (EU) 833/2014
Y228
The prohibitions defined in article 12g.1 of Council Regulation (EU) No 833/2014 do not apply (see contractual exemptions in article 12g.2 b)
Y229
Public contracts concluded with a public authority in a third country or with an international organisation - Article 12g paragraph 2a of Regulation (EU) 833/2014
Exactly one of:
All third countries
Y230
Contract prohibits re-exportation to Belarus and re-exportation for use in Belarus – Article 8g paragraph 1 of Council Regulation (EC) No 765/2006
Y231
The prohibitions defined in article 8g.1 of Council Regulation (EC) No 765/2006 do not apply (see contractual exemptions in article 8g.2)
Y232
Public contracts concluded with a public authority in a third country or with an international organisation - Article 8g paragraph 3 of Council Regulation (EC) No 765/2006
Exactly one of:
Belarus
X807
Export authorisation by virtue of article 1sa.7 of Regulation (EC) No 765/2006
Y869
The prohibitions defined in article 1sa of Council Regulation (EC) No 765/2006 do not apply (see contractual exemptions in article 1sa.5)
Exactly one of:
Belarus
X807
Export authorisation by virtue of article 1sa.7 of Regulation (EC) No 765/2006
X850
Export authorisation by virtue of article 1sa.6a of Council Regulation (EU) 765/2006
X851
Export authorisation by virtue of article 1sa.7b of Council Regulation (EU) 765/2006
Exactly one of:
Belarus
X844
Export authorisation by virtue of article 1bb.8 of Council Regulation (EU) 765/2006
Y719
The prohibitions defined in article 1bb paragraph 1 of Council Regulation (EU) No 765/2006 do not apply (see exemptions in article 1bb paragraph 7)
Y745
The prohibitions defined in article 1bb paragraph 1 of Council Regulation (EU) No 765/2006 do not apply (see exemptions in article 1bb paragraph 11)
Exactly one of:
Belarus
L152
Import authorisation by virtue of article 1ra paragraph 10 of Council Regulation (EU) 765/2006
Y727
The prohibitions defined in article 1ra paragraph 1 of Council Regulation (EU) No 765/2006 do not apply (see exemptions in article 1ra paragraph 3)
Y728
The prohibitions defined in article 1ra paragraph 1 of Council Regulation (EU) No 765/2006 do not apply (see exemptions in article 1ra paragraph 4)
Y870
Goods entered the territory of the customs union of the EU and presented to customs authorities prior to the entry into force or to applicability date of the present sanction, whichever is latest (see Article 8f of Regulation (EU) No 765/2006)
Exactly one of:
Belarus
X807
Export authorisation by virtue of article 1sa.7 of Regulation (EC) No 765/2006
X850
Export authorisation by virtue of article 1sa.6a of Council Regulation (EU) 765/2006
X851
Export authorisation by virtue of article 1sa.7b of Council Regulation (EU) 765/2006
Y869
The prohibitions defined in article 1sa of Council Regulation (EC) No 765/2006 do not apply (see contractual exemptions in article 1sa.5)
Exactly one of:
Belarus
X844
Export authorisation by virtue of article 1bb.8 of Council Regulation (EU) 765/2006
Y718
The prohibitions defined in article 1bb.1 of Council Regulation (EU) No 765/2006 do not apply (see contractual exemptions in article 1bb.4)
Y719
The prohibitions defined in article 1bb paragraph 1 of Council Regulation (EU) No 765/2006 do not apply (see exemptions in article 1bb paragraph 7)
Y745
The prohibitions defined in article 1bb paragraph 1 of Council Regulation (EU) No 765/2006 do not apply (see exemptions in article 1bb paragraph 11)
Exactly one of:
Belarus
L152
Import authorisation by virtue of article 1ra paragraph 10 of Council Regulation (EU) 765/2006
Y727
The prohibitions defined in article 1ra paragraph 1 of Council Regulation (EU) No 765/2006 do not apply (see exemptions in article 1ra paragraph 3)
Y728
The prohibitions defined in article 1ra paragraph 1 of Council Regulation (EU) No 765/2006 do not apply (see exemptions in article 1ra paragraph 4)
Y730
The prohibitions defined in article 1ra.1 of Council Regulation (EU) No 765/2006 do not apply (see contractual exemptions in article 1ra.9)
Y870
Goods entered the territory of the customs union of the EU and presented to customs authorities prior to the entry into force or to applicability date of the present sanction, whichever is latest (see Article 8f of Regulation (EU) No 765/2006)
Exactly one of:
Belarus
L152
Import authorisation by virtue of article 1ra paragraph 10 of Council Regulation (EU) 765/2006
L154
Import authorisation by virtue of article 8da paragraph 2 of Council Regulation (EU) 765/2006
Y727
The prohibitions defined in article 1ra paragraph 1 of Council Regulation (EU) No 765/2006 do not apply (see exemptions in article 1ra paragraph 3)
Y728
The prohibitions defined in article 1ra paragraph 1 of Council Regulation (EU) No 765/2006 do not apply (see exemptions in article 1ra paragraph 4)
Y730
The prohibitions defined in article 1ra.1 of Council Regulation (EU) No 765/2006 do not apply (see contractual exemptions in article 1ra.9)
Y870
Goods entered the territory of the customs union of the EU and presented to customs authorities prior to the entry into force or to applicability date of the present sanction, whichever is latest (see Article 8f of Regulation (EU) No 765/2006)
Exactly one of:
Russian Federation
L142
Import authorisation by virtue of article 3i paragraph 3c of Council Regulation (EU) 833/2014
L143
Import authorisation by virtue of article 12b.2 of Council Regulation (EU) 833/2014
Exactly one of:
Russian Federation
L142
Import authorisation by virtue of article 3i paragraph 3c of Council Regulation (EU) 833/2014
Y850
The prohibitions defined in article 3i.1 of Council Regulation (EU) No 833/2014 do not apply (see contractual exemptions in article 3i.3ca)
Exactly one of:
Russian Federation
L142
Import authorisation by virtue of article 3i paragraph 3c of Council Regulation (EU) 833/2014
Y859
Goods entered the territory of the customs union of the EU and presented to customs authorities prior to the entry into force or to applicability date of the present sanction, whichever is latest (see Article 12e of Regulation (EU) No 833/2014)
Exactly one of:
Russian Federation
X830
Export authorisation by virtue of article 3c.6 of Council Regulation (EU) 833/2014
X839
Export authorisation by virtue of article 3c paragraph 6a of Council Regulation (EU) 833/2014
Exactly one of:
Russian Federation
L142
Import authorisation by virtue of article 3i paragraph 3c of Council Regulation (EU) 833/2014
L143
Import authorisation by virtue of article 12b.2 of Council Regulation (EU) 833/2014
Y850
The prohibitions defined in article 3i.1 of Council Regulation (EU) No 833/2014 do not apply (see contractual exemptions in article 3i.3ca)
Exactly one of:
Russian Federation
L142
Import authorisation by virtue of article 3i paragraph 3c of Council Regulation (EU) 833/2014
L143
Import authorisation by virtue of article 12b.2 of Council Regulation (EU) 833/2014
Y859
Goods entered the territory of the customs union of the EU and presented to customs authorities prior to the entry into force or to applicability date of the present sanction, whichever is latest (see Article 12e of Regulation (EU) No 833/2014)
Exactly one of:
Russian Federation
L142
Import authorisation by virtue of article 3i paragraph 3c of Council Regulation (EU) 833/2014
Y850
The prohibitions defined in article 3i.1 of Council Regulation (EU) No 833/2014 do not apply (see contractual exemptions in article 3i.3ca)
Y851
—
Exactly one of:
Russian Federation
X830
Export authorisation by virtue of article 3c.6 of Council Regulation (EU) 833/2014
X831
Export authorisation by virtue of article 3c. paragraph 6c of Council Regulation (EU) 833/2014
X839
Export authorisation by virtue of article 3c paragraph 6a of Council Regulation (EU) 833/2014
Exactly one of:
Russian Federation
X830
Export authorisation by virtue of article 3c.6 of Council Regulation (EU) 833/2014
X839
Export authorisation by virtue of article 3c paragraph 6a of Council Regulation (EU) 833/2014
Y848
The prohibitions defined in article 3c.1 of Council Regulation (EU) No 833/2014 do not apply (see contractual exemptions in article 3c.5a)
Exactly one of:
Russian Federation
L142
Import authorisation by virtue of article 3i paragraph 3c of Council Regulation (EU) 833/2014
L143
Import authorisation by virtue of article 12b.2 of Council Regulation (EU) 833/2014
Y859
Goods entered the territory of the customs union of the EU and presented to customs authorities prior to the entry into force or to applicability date of the present sanction, whichever is latest (see Article 12e of Regulation (EU) No 833/2014)
Y874
The prohibitions defined in article 3i.1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in article 3i.3aa)
Exactly one of:
Russian Federation
X830
Export authorisation by virtue of article 3c.6 of Council Regulation (EU) 833/2014
X831
Export authorisation by virtue of article 3c. paragraph 6c of Council Regulation (EU) 833/2014
X832
Export authorisation by virtue of article 3c.6e of Council Regulation (EU) 833/2014
X839
Export authorisation by virtue of article 3c paragraph 6a of Council Regulation (EU) 833/2014
Exactly one of:
Russian Federation
X834
Export authorisation by virtue of article 3k.5 of Council Regulation (EU) 833/2014
X837
Export authorisation by virtue of article 3k.5b of Council Regulation (EU) 833/2014
X840
Export authorization by virtue of article 5q paragraph 1 of Council Regulation (EU) 833/2014
Y833
The prohibitions defined in article 3k paragraph 1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in article 3k paragraph 4)
Exactly one of:
Russian Federation
Y987
The prohibitions defined in articles 2.1 and 2a.1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in articles 2.3 and 2a.3)
Y990
—
Y991
—
Y995
Goods other than those concerned by the prohibitions defined in articles 2.1 and 2a.1 of Regulation (EU) No 833/2014
Exactly one of:
Russian Federation
L142
Import authorisation by virtue of article 3i paragraph 3c of Council Regulation (EU) 833/2014
L143
Import authorisation by virtue of article 12b.2 of Council Regulation (EU) 833/2014
L156
Import authorisation by virtue of article 3i paragraph 3f of Council Regulation (EU) 833/2014
Y859
Goods entered the territory of the customs union of the EU and presented to customs authorities prior to the entry into force or to applicability date of the present sanction, whichever is latest (see Article 12e of Regulation (EU) No 833/2014)
Y874
The prohibitions defined in article 3i.1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in article 3i.3aa)
Exactly one of:
Russian Federation
X830
Export authorisation by virtue of article 3c.6 of Council Regulation (EU) 833/2014
X831
Export authorisation by virtue of article 3c. paragraph 6c of Council Regulation (EU) 833/2014
X832
Export authorisation by virtue of article 3c.6e of Council Regulation (EU) 833/2014
X839
Export authorisation by virtue of article 3c paragraph 6a of Council Regulation (EU) 833/2014
X841
Export authorisation by virtue of article 3c paragraph 6f of Council Regulation (EU) 833/2014
Exactly one of:
Russian Federation
X834
Export authorisation by virtue of article 3k.5 of Council Regulation (EU) 833/2014
X837
Export authorisation by virtue of article 3k.5b of Council Regulation (EU) 833/2014
X840
Export authorization by virtue of article 5q paragraph 1 of Council Regulation (EU) 833/2014
X852
Export authorisation by virtue of article 3k.5e of Council Regulation (EU) 833/2014
Y833
The prohibitions defined in article 3k paragraph 1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in article 3k paragraph 4)
Exactly one of:
Russian Federation
X834
Export authorisation by virtue of article 3k.5 of Council Regulation (EU) 833/2014
X837
Export authorisation by virtue of article 3k.5b of Council Regulation (EU) 833/2014
X838
Export authorisation by virtue of article 3k.5f of Council Regulation (EU) 833/2014
X840
Export authorization by virtue of article 5q paragraph 1 of Council Regulation (EU) 833/2014
X852
Export authorisation by virtue of article 3k.5e of Council Regulation (EU) 833/2014
Y833
The prohibitions defined in article 3k paragraph 1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in article 3k paragraph 4)
Exactly one of:
Ukraine
X802
Export authorisation by virtue of paragraphs 1 and 3 of Article 2e of Council Regulation (EU) No 692/2014
Y997
Goods not originating from or destined to Crimea or Sevastopol (Articles 2 and 2b.1 of Council Regulation (EU) No 692/2014)
Exactly one of:
Ukraine
X985
Export authorisation by virtue of article 7 of Council Regulation (EU) 2022/263
Y984
Goods not originating from or not destined for the non-government controlled areas of Ukraine in the oblasts of Donetsk, Kherson, Luhansk and Zaporizhzhia
Exactly one of:
Ukraine
X802
Export authorisation by virtue of paragraphs 1 and 3 of Article 2e of Council Regulation (EU) No 692/2014
Y997
Goods not originating from or destined to Crimea or Sevastopol (Articles 2 and 2b.1 of Council Regulation (EU) No 692/2014)
Y998
There are no reasonable grounds to determine that the goods are to be used in Crimea or Sevastopol (Article 2b.3 of Council Regulation (EU) No 692/2014)
Exactly one of:
Ukraine
X985
Export authorisation by virtue of article 7 of Council Regulation (EU) 2022/263
Y983
The prohibitions defined in articles 2.1 and 4.1 of Council Regulation (EU) 2022/263 do not apply (see exemptions in articles 2.2 and 4.3)
Y984
Goods not originating from or not destined for the non-government controlled areas of Ukraine in the oblasts of Donetsk, Kherson, Luhansk and Zaporizhzhia
Exactly one of:
Ukraine
Y983
The prohibitions defined in articles 2.1 and 4.1 of Council Regulation (EU) 2022/263 do not apply (see exemptions in articles 2.2 and 4.3)
Y984
Goods not originating from or not destined for the non-government controlled areas of Ukraine in the oblasts of Donetsk, Kherson, Luhansk and Zaporizhzhia
Y985
—
Sub-items
9026 10For measuring or checking the flow or level of liquids