List of Group 2 measuring instruments subject to inspection in Vietnam as of October 15, 2024

No.

Measuring instrument

Metrological control measures

Inspection interval

Type approval

Inspection

Once

Periodically

After repair

(1)

(2)

(3)

(4)

(5)

(6)

(7)

1

Measuring instrument for length:

- Measuring tape

-

x

-

-

-

- Photoelectric distance measuring instrument

-

x

x

x

12 months

- Water depth measuring instrument

-

x

x

x

12 months

- Measuring instrument for depths of underwater structure

-

x

x

x

24 months

2

Taximeter

x

x

x

x

18 months

3

Speed gun

x

x

x

x

24 months

4

Level measuring instrument

-

x

x

x

12 months

5

Electronic total station

-

x

x

x

12 months

6

Analytical balance

-

x

x

x

12 months

7

Engineer’s scale

-

x

x

x

12 months

8

Universal scales:

- Dial spring scale

x

x

x

x

24 months

- Table top scale; beam scale; steel hanging scale

x

x

x

x

12 months

9

Crane scale

x

x

x

x

12 months

10

Vehicle scale

x

x

x

x

12 months

11

Specialized vehicle scale for vehicle load inspection

x

x

x

x

24 months

12

Static railway scale

x

x

x

x

12 months

13

Active railway scale

x

x

x

x

24 months

14

Conveyor scale

x

x

x

x

12 months

15

Vehicle load inspection scales

x

x

x

x

12 months

16

Weights:

- E2 accuracy weights

-

x

x

x

24 months

- F1 accuracy weights or less

-

x

x

x

12 months

17

Tensile and yield strength testing instrument

-

x

x

x

12 months

18

Momentum flux measuring instrument

-

x

x

x

12 months

19

Fuel dispensers

x

x

x

x

12 months

20

LPG dispensers

x

x

x

x

12 months

21

Water level gauges:

- Mechanical cold water gauges

x

x

x

x

60 months

- Electronic cold water gauges

x

x

x

x

36 months

22

Gasoline gauges

x

x

x

x

12 months

23

Gas gauges:

- LPG gauges

x

x

x

x

12 months

- Industrial gas gauges

x

x

x

x

36 months

- Civil gas gauges:

x

x

x

x

+ Qmax < 16 m3/h

x

x

x

x

60 months

+ Qmax ≥ 16 m3/h

x

x

x

x

36 months

24

Common volumetric measuring instrument

-

x

x

x

24 months

25

Pipettes

-

x

x

x

24 months

26

Fixed tanks

-

x

x

x

60 months

27

Tanks:

- Automobile-transported tanks

- Railway-transported tanks

-

-

x

x

x

x

x

x

12 months

60 months

28

Automatic fuel measuring instrument

x

x

x

x

12 months

29

Water flow measuring instrument

-

x

x

x

24 months

30

Wind speed measuring instrument

-

x

x

x

24 months

31

Manometers: spring manometers; electronic manometers; barometers

-

x

x

x

12 months

32

Sphygmomanometers include: mercury sphygmomanometers; spring sphygmomanometers; electronic sphygmomanometers

-

x

x

x

12 months

33

Thermometers: liquid-in-glass thermometers; alcohol thermometers; mercury-in-glass thermometers with maximum device

-

x

x

-

24 months

34

Medical thermometers:

- Macroscale mercury-in-glass medical thermometer

-

x

-

-

-

- Electrical thermometers with maximum device

-

x

x

-

06 months

- Electrical infrared thermometers

-

x

x

x

12 months

35

Grain moisture meter

-

x

x

x

12 months

36

Air hygrometers and thermometers

-

x

x

x

24 months

37

Hydrometers

-

x

x

x

24 months

38

Dust content measuring instrument:

- Measuring instrument for dust contents in emission

-

x

x

x

12 months

- Measuring instrument for dust contents in the air

-

x

x

x

12 months

39

Measuring instrument for alcohol in breath

x

x

x

x

12 months

40

Measuring instrument for contents of gases:

- Measuring instrument for contents of gases in emission

-

x

x

x

12 months

- Measuring instrument for contents of gases in the air

-

x

x

x

12 months

41

Measuring instrument for  water statistics:

- Measuring instrument for water statistics in surface water

-

x

x

x

12 months

- Measuring instrument for water statistics in wastewater

-

x

x

x

12 months

42

Measuring instrument for salt moisture

-

x

x

x

12 months

43

Electric meters:

- One-phase AC electronic meters

x

x

x

x

72 months

- Three-phase AC induction meters

x

x

x

x

48 months

- Three-phase AC electronic meters

x

x

x

x

36 months

44

Current transformers

x

x

x

x

60 months

45

Voltage transformers

x

x

x

x

60 months

46

Insulation resistance testers

-

x

x

x

12 months

47

Earth resistance testers

-

x

x

x

12 months

48

Explosive and detonator resistance testers

-

x

x

x

6 months

49

Measuring instrument for electric field intensity

-

x

x

x

12 months

50

Electrocardiogram devices

-

x

x

x

24 months

51

Electroencephalograph devices

-

x

x

x

24 months

52

Sound level meters

-

x

x

x

12 months

53

Vibration meters

-

x

x

x

12 months

54

Illuminance meters

-

x

x

x

12 months

55

Luminance meters

-

x

x

x

12 months

56

UV meters

-

x

x

x

12 months

57

Spectrometers:

- Atomic absorption spectrometers

-

x

x

x

12 months

- Ultraviolet - visible spectroscopy

-

x

x

x

12 months

58

Laser power meter

-

x

x

x

12 months

59

Focimeters

-

x

x

x

12 months

60

Eye refractometers

-

x

x

x

12 months

61

Optical trial lens

-

x

x

x

12 months

62

Polarimeters for determination of sugar contents (Pol)

-

x

x

x

12 months

63

Refractometers for determination of sugar contents (Brix)

-

x

x

x

12 months

64

Rain gauges

-

x

x

x

24 months

65

Water level meters

-

x

x

x

24 months

66

Automatic instrument for continuous metrology measurement

-

x

x

x

24 months

67

Measuring instrument for latitude and longitude

-

x

x

x

12 months

68

Satellite navigation instrument

-

x

x

x

12 months

69

Electric vehicle charging power meter:

- AC charging power meter for electric bicycles and electric bikes

x

x

x

x

60 months

- AC charging power meter for electric cars

x

x

x

x

36 months

- DC charging power meter for electric cars

x

x

x

x

36 months