ALLA FRANCE ® Precision thermometers are manufactured using yellow Sodocalcique glass with a diameter 6-7 mm.
Mercury or red liquid filling. With a triangular ring.

They possess an expansion chamber to support temperatures higher than those of the thermometer.
The graduation is printed and fused in the glass with a special process. The graduation resists to all chemical products except fluoridric acid and hot soda (to a lesser extent) because these 2 products attack the glass. Even if you can feel a relief when touching the graduation, the thermometer is not engraved.

Available in partial or total immersion.
For partial immersion (76mm usually), there is a line printed around the thermometer at 76mm with a clear mention: "Imm. 76mm” enables to immerse the thermometer to the correct depth..

Systematically delivered in sealed blister by 6 pcs, without certificate.
Thermometers mercury filling are delivered in sealed blister by 15 pcs too and with a mercury decontamination kit.