CLEANING THE SENSOR
If your vacuum gauge is behaving erratically, cleaning the sensor may be necessary.
Use isopropyl (isopropanol) alcohol only. Do NOT use denatured alcohol as it leaves residue after evaporation. Do not use other solvents as they may be too corrosive
and permanently damage the sensor and or its surroundings. Isopropyl of 90% pure or better should be used. Hardware stores will sell 99% pure, found near the paint
thinners and solvents.
Follow steps 1-6 below. If issues continue, an alternate method of cleaning the sensor is to soak the sensor in alcohol overnight. If you have trouble getting an accurate
reading after cleaning the sensor, please check your gasket or o-ring for damage, wear, or to see if it is missing.
Tools Required
Rubbing Alcohol (Isopropyl)
Step 1
Liberally pour rubbing
alcohol into the sensor.
Step 2
Cover fitting opening
with your thumb or
finger.
Step 3
Agitate the rubbing
alcohol in the sensor
to clean by shaking for
a few seconds.
Step 4
Dump excess alcohol.
Step 5
Repeat steps 1-4 at
least twice.
Step 6
Allow to air dry or pull
vacuum on gauge to
expedite drying.
SH-35N
DV-40S
DV-41
DV-22N
CLEANING AND REPAIR INSTRUCTIONS
DIGITAL VACUUM GAUGES
JB INDUSTRIES
