THERMAL PROTECTION SYSTEM

摘要

Apparatus (10) comprises a first ("inner") container (12) and a second ("outer") container (14) configured to house the first container (12). The first container (12) is configured to house a data logging device (20) whilst connected to at least one external thermocouple (22). The first container (2) is sealed in use to prevent ingress of oil during an oil quench of a thermal treatment process. The second container (14) is intentionally unsealed to allow egress of air when the apparatus (10) is heated during the thermal treatment process. This means that oil will penetrate the second container (14) during the oil quench of the thermal treatment process. The second container (14) comprises at least one disposable insulation member (30) defining a chamber (32) for accommodating (10) the first container (12). The at least one disposable insulation member (30) is substantially non- absorbent to oil, meaning that oil retention and consequential fire risk will be minimised when the apparatus (10) is opened to access the data logging device (10) after the oil quench of the thermal treatment process.