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Under the Loupe/ETA E40 305

E40 305

The E40 305 is the main calibre that was most widely used in the classic Tissot T-Touch watches, prior to the release of the T-Touch Expert. It is very similar to the E40 301, except that the mechanism is slightly taller, uses no jewelled bushings, and employs plastic wheels in place of the Brass wheels used in the E40 301.

1 Functions
2 Overview of Features
3 Synchronization
4 Technical Information
5 See Also
6 Elsewhere on the Web

[edit] Functions

Time
Date
Touchscreen
Digital and Analog display
Air pressure (digital)
Weather trending (analog)
Altimeter (digital)
Chronograph (digital)
Alarm
Compass (digital & analog)
Thermometer (digital)

[edit] Overview of Features

The following video demonstrates the various features of ETA calibre E40 305 as used in the Tissot T-Touch

[edit] Synchronization

For detailed instructions on synchronizing the analog and digital functions of the E40 305, click here.

[edit] Technical Information

The pressure sensor in the E40 305 is the MS761, made by Intersema Sensoric SA. The sensor element of the MS761 consists of a silicon micro-machined membrane mounted on a small square of Pyrex™ glass. The pressure sensor used in the T-Touch Expert is the MS7801.