Thermax temperature indicators are used to monitor and permanently record if a surface or product has reached a specific temperature. They are commonly used for: 

• Process validation 

• Proof of curing, drying, or bonding 

• Preventative maintenance 

• Monitoring equipment overheating 

• Warranty and quality control verification 

• Manufacturing and industrial temperature monitoring 

Thermax provides a simple and cost-effective way to verify that the correct temperature has been reached during a process. The indicators react in seconds once the specified temperature is reached, providing an immediate and permanent visual record for accurate monitoring and inspection. 

Thermax uses special temperature-sensitive chemicals that melt at precise temperatures. When the rated temperature is reached, the chemical melts into an absorbent backing and permanently changes color from white to black. 

Yes. The color change is irreversible, meaning the label permanently records that the temperature was reached or exceeded. This provides a reliable visual record for quality control, maintenance inspections, process verification, and warranty documentation without requiring batteries or electronic equipment. 

The indicator changes from white (or light gray) to black once the rated temperature has been exceeded. Some high-temperature labels with polyimide film may appear orange before activation. 

Standard Thermax products cover temperatures from 29°C to 290°C (84°F to 554°F). 

Thermax labels are highly accurate: 

• Below 100°C: ±1°C 

• 100°C to 154°C: ±1.5°C 

• Above 154°C: ±(1% + 1°C) of rated temperature 

Response times depend on the temperature range: 

• Lower temperatures: approximately 2–10 seconds 

• Higher temperatures: approximately 7–30 seconds 

Thermax temperature indicators are available in multiple formats and sizes depending on the number of temperature levels and application needs. 

Standard strip formats (multi-level): 

• 10-Level Strips — Size: 2.00″ × 0.7″ (51 × 18 mm). Temperature ranges vary by series, typically covering approximately 37°C to 260°C (99°F to 500°F). 

• 8-Level Strips — Size: 2.00″ × 0.7″ (51 × 18 mm). Temperature ranges span approximately 29°C to 290°C (84°F to 554°F), depending on the configuration. 

• 5-Level Strips (Standard Vertical) — Size: 2.00″ × 0.7″ (51 × 18 mm). Temperature ranges vary by model, typically from about 37°C to 166°C (99°F to 331°F). 

Alternative formats: 

• 5-Level “Clock” (Circular) — Size: 0.55″ diameter (14 mm). Temperature ranges available from approximately 37°C to 290°C (99°F to 554°F). 

• 4-Level Labels — Size: 0.91″ × 1.77″ (23 × 45 mm). Temperature ranges available up to approximately 224°C (435°F). 

• Mini / Micro Formats (including single-point indicators) — Sizes as small as 0.15″ × 0.43″ (4 × 11 mm). Designed for small or tight applications, with temperature ranges depending on the product. 

Thermax temperature indicators are used to monitor and permanently record if a surface or product has reached a specific temperature. They are commonly used for: 

• Process validation 

• Proof of curing, drying, or bonding 

• Preventative maintenance 

• Monitoring equipment overheating 

• Warranty and quality control verification 

• Manufacturing and industrial temperature monitoring 

Thermax provides a simple and cost-effective way to verify that the correct temperature has been reached during a process. 

Simply peel the label from the backing paper and apply it to a clean, dry, dust-free, and grease-free surface. 

Yes. The labels will not delaminate when removed and can be attached to inspection reports or maintenance records as permanent evidence of temperature exposure. 

Thermax labels work on many common surfaces including aluminum, copper, and steel. They can also be applied to most clean, dry, and smooth metal or equipment surfaces where accurate surface temperature monitoring is needed. For best performance, the application surface should be free of oil, dirt, moisture, and loose coatings to ensure proper adhesion and temperature response. 

Yes. Thermax labels are resistant to water, oil, and steam under normal conditions. 

Yes, most labels perform well in oil exposure tests. However, heating and cooling the label while submerged in oil may increase the risk of oil entering the label. 

ShockWatch 2 QR detects impacts that can cause misalignment, calibration issues, or internal component damage in machinery, sensors, and control panels.