Auber Instruments, Inc.
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Figure 2. The factory sticker usually can be found on the base (left), and the manufacture month and
year are printed in the lower right corner of the sticker (right).
Step 2: Check the Boiler -- The Most Reliable Way
The most reliable way to tell if the boiler can take the PT100M4 screw sensor is to open up the
machine and directly check the boiler.
Tools Needed
Phillips screwdriver and flat-head screw driver.
Remove the water tank, remove the four screws on the top of the Rancilio Silvia, and then remove the
top cover. There are two thermostats on the top of the boiler, each thermostat is held in place by a clip
with two screws on each side. Pick one of the thermostats, use the flat-head screwdriver to loosen the
screws. Be careful not to drop the screws or the clip. Once you can lift the thermostat, you can see the
boiler surface beneath it. The photos in Figure 3 are two examples from our customers.
Figure 3. Two examples of boilers with M4 screw holes at where thermostats are installed.
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