The testo 160 THL is a part of the testo 160 data logger family developed specifically for the needs of museums.  This system allows for the configuration of internal sensors and external probes, to match any monitoring situation in a museum or archival setting.
The logger data is accessible at any time from any browser enabled device, such as a smart phone, tablet, or a PC or Mac.

Monitoring temperature, humidity, illuminance, and UV radiation with the testo 160 THL Wi-Fi data logger
The testo 160 THL Wi-Fi data logger provides a complete, single instrument solution for monitoring humidity, temperature, illuminance, and UV, from a single mounting point location.  One discretely mounted instrument will record four important environmental factors that affect the material integrity and color of displayed artwork or historical objects.
 
The testo 160 THL Wi-Fi data logger – unobtrusive and easy to hide
So as not to distract from your art exhibit, the testo 160 THL logger was made small, about 2.5x3.6x0.95 inches. To make it easy to conceal in an exhibit or a display case, an optional paintable deco cover is available to help the logger blend in with its surroundings.

A perfect network appliance – uses an existing Wi-Fi network to send data to the Testo Cloud
The Testo Cloud is a central data repository for all of your testo 160 THL data loggers.  On your Testo Cloud account, you can configure data loggers and set alarm points, designate authorized users, and set recipients for alarms and monitoring reports.
To start, register at www.museum.saveris.net to gain access to your account.  To register you can use a normal webbrowser.
Depending on your needs, you can select between the free Basic or subscription based Advanced functionalities as needed, to create 10 user accounts, or add text messaging of alarms, for example.

Museum, archive, and storage applications for the testo 160 THL Wi-Fi data logger
Measure and collect temperature, humidity, lux, and UV exposure data on an exhibit room or storage area reliably and without interruption.  The professional testo 160 THL Wi-Fi data logger is optimized for monitoring applications of ambient conditions in museums, galleries, and archives.

Additional functionality of the testo 160 THL Wi-Fi data logger
The logger comes with a large internal memory for 40,000 measurement values to protect your data, in case of a blackout or Wi-Fi network issues.  The logger housing has IP20 moisture protection, and uses readily available, standard alkaline batteries.  The batteries are monitored, and should last for about 12 months.  The logger can also be powered by an external USB power supply, and in such a case, the batteries will be used only during a loss of power.