reweigh

Reweigh is the act of weighing something again, typically to verify a measurement, correct an error, or assess a change in mass after a processing step. It contrasts with the initial weigh, which is the first measurement taken. Reweighing may be performed with the same instrument or a different scale, and is often recorded to document accuracy.

In logistics and shipping, a reweigh is commonly performed to confirm a package’s weight for postage, billing, or carrier compliance with weight limits. If the reweighed result differs from the original reading, charges or handling can be adjusted. Reweighs may be carried out by the carrier at pickup, at a sorting facility, or by the sender.

In manufacturing and quality control, reweighing checks the mass of goods after packaging, capping, or sorting to ensure batch consistency and regulatory compliance. Automated weighing lines may trigger reweighs when tare or packaging changes occur. Significant deviations can prompt product traceability actions or rejection of a batch.

In scientific and laboratory contexts, reweighing supports gravimetric analyses, moisture determinations, and sample preparation workflows. Conditions such as temperature, humidity, and drying can affect mass, so reweighing is often performed after equilibration or drying and accompanied by uncertainty estimates.

Best practices for reweighing include using calibrated instruments with traceability to standards, performing zeroing and taring, recording the time and condition of weighing, and noting any environmental factors that could affect the result. Documentation supports auditability and decision-making.