Weight verification can happen two ways: while product keeps moving through the line (in-motion, or "dynamic," checkweighing), or by briefly stopping each unit to weigh it (static weighing). The right choice comes down almost entirely to your line speed and how much a stoppage per unit actually costs you.
In-Motion (Dynamic) Checkweighing
Product moves continuously through the checkweigher on a conveyor section fitted with a weighing platform, with weight captured while the unit is in motion — no stoppage, no line interruption for the weighing step itself.
Best fit: any production line where throughput matters — this is the standard configuration for continuous packaging and filling lines, and is what ENZAC's checkweigher range is built around. On ENZAC's standard range, in-motion weighing runs at speeds up to 200 packages per minute, with accuracy of ±0.5g to ±5g depending on model and speed, and a choice of pusher arm, air-blast, or drop-gate reject mechanisms — all designed to remove out-of-tolerance product without stopping the line.
Where it falls short: accuracy at very high speed involves a real trade-off — faster line speed generally means slightly wider achievable accuracy tolerance, which is why model and speed selection both affect the accuracy figure, not just the checkweigher's inherent capability.
Static Weighing
Each unit is stopped briefly on a weighing platform, weighed at rest, then released to continue. This eliminates the motion-related accuracy trade-off entirely, since the unit is stationary during the actual measurement.
Best fit: applications where absolute weighing accuracy at the finest tolerance matters more than throughput — very low-volume lines, or products where even the small accuracy trade-off of in-motion weighing isn't acceptable.
Where it falls short: stopping every unit to weigh it caps your achievable line speed in a way that's simply incompatible with most continuous production environments — the throughput cost is usually far larger than the accuracy gain justifies.
Decision Table
| Requirement | In-Motion | Static |
|---|---|---|
| Continuous line, throughput matters | ✓ Best fit | Not suited — creates a bottleneck |
| Speeds up to 200 packages/min | ✓ Best fit | Not achievable |
| Absolute finest accuracy at any cost to speed | Very good, slight motion trade-off | ✓ Marginally better |
| Low-volume, low-speed operation | Works, but underused capability | Acceptable — throughput isn't the constraint |
Where ENZAC Fits
ENZAC's checkweigher range is built for in-motion operation — the standard requirement for production-line weight verification where line speed genuinely matters. For the rare application genuinely requiring static weighing, that's a different equipment conversation worth having explicitly rather than assuming an in-motion checkweigher can be run in a stop-and-weigh mode.
Review the full Checkweigher specification range — speed, accuracy, and reject mechanism options — before finalising your line's weight verification setup.
Ready to talk about your checkweigher?
ENZAC supplies in-motion checkweighers in Malaysia, matched to your product weight range and required line speed. Send us your line speed and product weight range and we'll recommend a configuration.