Sigma SM 8850e-20

Special instrument which with the help of a booster permits water resistance testing up to 20 bar gauge pressure or 70% vacuum. The extremely sensitive measuring probe even registers deformations of extremely hard casings under vacuum. The interior of the pressure chamber has been modified to take larger watches and the sensor button has been repositioned higher than on previous models. The watch is lifted into the testing position automatically and an LCD display shows the testing parameters and the result of the test.

Features:
- 10 manually programmable testing cycles from –0.7 up to 20 bar
- testing under vacuum and under pressure carried out entirely automatically
- measured values shown on a large LCD display
- locking system with electrical monitoring
- simple handling and programming
- serial printer connection for printing out test results and measuring parameters, also via PC

Technical details:
max. vacuum: 70%
max. pressure: 20 bar
measuring range: -0.3 to 0.9 mm
display deformation: 0.0001 mm
max. measurable deformation: 900 µm
measuring range variable: 10 - max. 90 s
power supply: 230 V / 50 hz
dimensions (L x B x H): 310 x 210 x 230 mm
weight: 7200 g

A high-capacity 25 litre compressor, and the 3.5x booster are required.

• dimensions series chamber