On this page it is possible to examine the current, daily average, minimum and maximum temperatures values and check the history of recorded values. These can help to spot on (for example) a possible failed fan and the resulting higher temperatures.
Based on the temperature values, a textual rating is displayed (like the rating based on the disk health). In case of a high temperature, the application may give tips to avoid problems.
In some cases the temperature sensor inside the hard disk may not provide correct values. It is recommended to verify the accuracy of the temperature sensor and perform the temperature calibration procedure (this hint displayed until a temperature offset (even 0) is not set for the hard disk). This may be more important for older hard disks, usually newer disk drives do not require temperature calibration.
At the bottom of this page the most recent values (measured in the current session) are displayed. It is also possible to examine the average and the minimum/maximum temperatures measured on the previous days. If Hard Disk Sentinel used for a longer period, the scroll bar under the graph can be used to scroll to a previous date. By using the small disk icon, the graph can be saved as image (BMP or JPG).
By the upper right corner, next to the "Current temperature" bar, there is an option: "Set custom temperature thresholds". By this option, it is possible to specify custom yellow (warning) and red (alert) levels for this particular device, which is used when determining if the device should trigger alert (instead of the global thresholds set at Configuration: Thresholds / tray icon page. These values are useful (for example) to specify higher, custom thresholds for NVMe SSDs (which usually work on higher temperatures) while keeping the default thresholds for hard disks and prevent "overheat" alert issued for the SSD.
You may access this "Custom temperature thresholds" dialog by double clicking on the current temperature bar (showing the current temperatue) on the top of the Temperature page too.