NW-MD-400 Metal Detector
Packaging-line metal detector with conveyor and reject.
Precision Weighing
Applications where a fine division, not a large capacity, is the deciding factor. Accuracy depends on the whole installation — draft, vibration, temperature and calibration — not on the number of digits.
A finer division shows smaller differences, but it is not the same thing as accuracy. A scale reading to 1 g can still be wrong by several grams if the platform is not level, the air moves across it, or the calibration no longer matches how the scale is used. Decide first what error the job can accept, then choose the resolution that can hold it.
Smaller divisions also react to their surroundings. Air movement from a door, a fan or an operator standing close by pushes a light platform; vibration from a nearby machine or a walkway shows up in the last digits; and a room that warms up during the day drifts the zero. A draft shield, a firm and level support, enough settling time and a stable temperature are often worth more than another digit.
Daily operation belongs to accuracy as well. How tare and container weight are handled, how long the operator waits for the value to stabilise, and whether an item is always placed in the same spot on the pan all affect repeatability. Where values are recorded, the resolution passed to the printer or the line system should match the resolution the scale can actually hold.
Calibration and periodic checking keep the figures meaningful: the scale is set up with known weights and the check is repeated at the interval your process and local rules require. Association with this condition only indicates that candidate products exist for fine weighing; readability, capacity, pan size, interface and the calibration routine still have to be confirmed for the configuration you order, and any metrology requirement is verified against local rules rather than assumed from this tag.
Primary task
Hold a fine, repeatable reading by controlling draft, vibration, temperature and calibration rather than by the specification sheet alone.
Questions to answer
- What error can the job accept, and what is the smallest weight you need to resolve?
- Which sources of drift are nearby — doors, fans, machinery, foot traffic or moving air?
- How is the container weight removed, and how long may the operator wait for a stable value?
- Where on the pan is the item placed, and can that position be repeated every time?
- How often can the scale be checked against known weights, and what does your local requirement ask for?
Next action
Open the Bench Scale and Weighing Indicator pages to compare divisions and stability features, then describe your process through the contact form so the checking routine can be agreed.
Weighing Integration for a Packaging Project
An in-line NW-CW-5 checkweigher supplied for a packaging project, with belt interface and accuracy conditions clarified together with the line integrator.
NW-BS-150 Bench Scale
150 kg bench scale with a 400 × 500 mm stainless pan for portioning, check weighing and general bench-top use.
NW-CW-5 Checkweigher
In-line checkweigher for packs up to 5 kg that compares every reading with a target weight and diverts packs outside the tolerance.
NW-LC-SB Shear Beam Load Cell
Stainless steel shear beam load cell in 500 kg, 1000 kg and 2000 kg capacities with a 2.0 mV/V output, sealed for platform and process weighing.