Calibration Label

Calibration labels provide a visible indication of an instrument's calibration status to users in the workplace. Physical labels are typically adhesive stickers applied to the instrument showing the calibration date, due date, and calibration technician or laboratory identification. Color-coded systems (green for in-calibration, red for out-of-calibration or limited use, yellow for reference only) are common. Some labels include a barcode or QR code linking to the electronic calibration record.

Labels serve as the first line of defense against using out-of-calibration instruments. Before using a measurement instrument, the operator should check the label to verify it has a current calibration. If the label shows the instrument is past due, is missing, or is damaged/unreadable, the instrument should not be used until its status is verified through the calibration management system.

For calibration management, labeling requirements are specified by most quality management systems and are commonly audited. Key considerations include label durability (adhesion in harsh environments, resistance to chemicals and cleaning), label placement (visible but not interfering with instrument function), label security (tamper-evident to prevent unauthorized changes), and label content (sufficient information for users to verify status at a glance). Some organizations are moving toward electronic labeling using RFID tags, NFC chips, or database-only systems where status is verified digitally rather than through physical labels.