Testo 0646 1065 testoterm +65°C Temperature Indicating Labels, 50-Pack, Self-Adhesive, 45 x 15 mm, White to Black

Maintenance teams use these self-adhesive temperature indicating labels to monitor heat build-up in electrical cabinets, motors, bearings, and machinery. Each label provides a clear irreversible colour change from white to black when the surface reaches +65 °C, giving an immediate visual signal of overheating without any instruments.

Key specifications

• Temperature threshold: +65 °C
• Accuracy: ±1.5 °C
• Response time: < 1 second
• Label dimensions: 45 x 15 mm
• Pack size: 50 labels
• Adhesive: permanent self-adhesive
• Material: polyester film
• Colour change: white to black (irreversible)
• Resistant to oil, water, and most chemicals (short-term exposure)
• Storage temperature: +6 to +36 °C
• Shelf life: 2 years under specified storage conditions

Why choose it

The irreversible colour change ensures that even a brief over-temperature event is permanently recorded, allowing you to identify and address potential issues before they lead to failure. The compact size and strong adhesive make these labels easy to apply to a wide range of surfaces.

Ideal use cases

• Monitoring electrical cabinets and switchgear
• Checking bearing and motor temperatures
• Process control and machine maintenance
• Quality assurance in manufacturing

Good to know

Store labels in a cool, dry place between +6 and +36 °C to maintain their accuracy and shelf life. Avoid prolonged exposure to harsh chemicals or abrasion, as this may affect the temperature-sensitive element.