{"id":1107649,"date":"2026-01-13T13:26:15","date_gmt":"2026-01-13T13:26:15","guid":{"rendered":"https:\/\/sercalia.com\/?p=1107649"},"modified":"2026-08-25T19:37:44","modified_gmt":"2026-08-25T19:37:44","slug":"how-warmmark-temperature-indicators-work","status":"publish","type":"post","link":"https:\/\/sercalia.com\/en\/how-warmmark-temperature-indicators-work\/","title":{"rendered":"How WarmMark Temperature Indicators work"},"content":{"rendered":"\n

How WarmMark temperature indicators work and why they are key in the cold chain<\/h1>\n<\/div><\/div><\/div><\/div><\/div>

WarmMark temperature indicators<\/span><\/a> have established themselves as an effective solution for temperature control in the transport and storage of sensitive products. These single-use devices provide visual and irreversible detection of any temperature deviations that could compromise the quality, safety or efficacy of products during logistics. They work by accumulating time above a defined temperature threshold, providing objective evidence for decision-making in the supply chain.\u00a0<\/span><\/p>\n

Maintaining the right temperature during transport and storage is a constant challenge in sectors such as pharmaceuticals, food, chemicals and biotechnology. Temperature variations can occur at multiple points along the route: in lorries, distribution centres, warehouses or during the last mile.<\/span><\/p>\n

Given this scenario, passive monitoring devices have gained prominence as a complement to traditional electronic systems. WarmMark responds to this need with simple, reliable and low-cost indicators that allow verification of whether a product has been exposed to unacceptable temperatures.<\/span><\/p>\n

WarmMark is an ascending time-temperature indicator designed to visually show cumulative exposure to temperatures above a predefined threshold. Its operating principle is based on the migration of a red dye through one or more reading windows.<\/span><\/p>\n

Once activated, the device cannot be reversed, making it one of the most widely used irreversible temperature indicators in the industry. The colour change from white to red acts as clear evidence of a temperature excursion.\u00a0<\/span><\/p>\n

WarmMark's operation is divided into three key phases.<\/span><\/p>\n

First, there is preconditioning and activation. Before use, the indicator must be kept for at least 30 minutes in an environment 5 \u00b0C below its activation temperature. It is then activated manually by removing a <\/span>pull <\/span><\/i>tab, which initiates the internal chemical process.\u00a0<\/span><\/p>\n

Secondly, when the indicator is exposed to temperatures above the threshold (\u00b11 \u00b0C accuracy), the dye begins to move slowly. The speed of movement depends on both the temperature level and the exposure time.<\/span><\/p>\n

 <\/p>\n<\/div><\/div><\/div>

\"How<\/span><\/div>
\"Solicite<\/span><\/a><\/div>
\"WarmMark<\/span><\/a><\/div><\/div><\/div>

There are different configurations:<\/span><\/p>\n