NCWM Device Category Codes
Adopted: July 2007, NCWM 92nd Annual Conference
| Device Code | Category | Capacity | Examples |
| SP | Scale, Precision | <5 g scale division |
jewelry, prescription scales |
| SS | Scale, Small | <300 lb |
retail computing scales |
| SM | Scale, Medium | 301 to 5 000 lb |
dormant, platform scales |
| SL | Scale, Large | >5 001 lb |
livestock, recycler scales, hopper scales, belt conveyor scales |
| SV | Scale, Vehicle | >40 000 lb |
vehicle, railway truck scales |
| MS | Meter, Small | <30 gpm |
retail motor fuel dispensers |
| MM | Meter, Medium | 30 to 200 gpm |
vehicle tank meters |
| ML | Meter, Large | >200 gpm |
agri-chemical meters, bulk oil meters, loading rack meters |
| MF | Meter, Mass Flow | All | heated tanks of corn syrup (soft drinks) |
| MW | Meter, Water | All | water sub-meters for mobile homes and apartments |
| MG | Meter, LPG | All | propane sales |
| MT | Meter, Taxi | All | taximeters |
| DT | Device, Timing | All | clocks in parking garages |
| DL | Device, Length Measuring | All | cordage meters |
| GM | Grain Moisture Meter | All | |
| GA | Grain Analyzer | All | |
| MD | Multiple Dimension Measuring Device | All | |
| MC | Meter Cryogenic | All |
Retail Motor Fuel Dispenser Counts Are Based on Meters