Categories of measuring instruments
The table below shows the measuring instrument categories that are included in the OIML-CS, along with the corresponding OIML Recommendations. It also shows the current Scheme (A or B) for each measuring instrument category, and the date the category of measuring instrument transitioned (or will transition) from Scheme B to Scheme A.
|
Measuring instrument category
|
Recommendation Number
|
Scheme
A B |
Transition from Scheme B to Scheme A
|
|
|
Taximeters
|
R 21
|
X
|
|
|
|
Material measures of length
|
R 35
|
X
|
||
|
Active electrical energy meters
|
R 46
|
X | ||
|
Water meters
|
R 49
|
X |
|
|
|
Continuous totalizers
|
R 50
|
X
|
||
|
Automatic catchweighers
|
R 51
|
X |
|
|
|
Sound level meters
|
R 58
|
X
|
||
|
Moisture meters for cereal grains and oilseeds
|
R 59
|
X
|
|
|
|
Load cells
|
R 60
|
X
|
|
|
|
Automatic gravimetric filling instruments
|
R 61
|
X
|
||
|
Heat meters
|
R 75
|
X
|
|
|
|
Non-automatic weighing instruments
|
R 76
|
X
|
|
|
| Road and rail tankers with level gauging |
R 80
|
|
X |
25 October 2026
|
|
Cryogenic liquids
|
R 81
|
X
|
|
|
|
Level gauges for stationary storage tanks
|
R 85
|
X
|
|
|
|
Integrating-averaging sound level meters
|
R 88
|
X
|
|
|
|
Focimeters
|
R 93
|
X
|
||
|
Vehicle exhaust emissions
|
R 99
|
X
|
|
|
|
Sound calibrators
|
R 102
|
X
|
|
|
|
Pure-tone audiometers
|
R 104
|
X
|
|
|
|
Automatic rail-weighbridges
|
R 106
|
X
|
|
|
|
Discontinuous totalizers
|
R 107
|
X
|
|
|
|
Pressure balances
|
R 110
|
X
|
|
|
|
Weights
|
R 111
|
|
X |
1 November 2025
|
|
Liquids other than water
|
R 117
|
X | ||
|
Speech audiometry
|
R 122
|
X
|
|
|
|
Evidential breath analyzers
|
R 126
|
X
|
||
|
Ergometers for foot crank work
|
R 128
|
|
||
|
Multi-dimensional measuring instruments
|
R 129
|
X
|
|
|
|
Liquid-in-glass thermometers
|
R 133
|
X
|
|
|
|
Weighing road vehicles in motion
|
R 134
|
X
|
|
|
|
Areas of leather
|
R 136
|
X
|
|
|
|
Gas meters
|
R 137
|
X |
|
|
|
Compressed gaseous fuel systems for vehicles
|
R 139
|
X
|
|
|
|
Continuous measurement of SO2 in stationary source emissions
|
R 143
|
X
|
|
|
|
Continuous measurement of CO, NOx in stationary source emissions
|
R 144
|
X
|
|
|
|
Ophthalmic instruments - Impression and applanation tonometers
|
R 145
|
X
|
|
|
|
Protein measuring instruments for cereal grains and oilseeds
|
R 146
|
X
|
|
|
|
Non-invasive non-automated sphygmomanometers
|
R 148
|
X
|
|
|
|
Non-invasive automated sphygmomanometers
|
R 149
|
X
|
|
|
|
Continuous totalizing automatic weighing instruments of the arched chute type
|
R 150
|
X
|
|
|
