LIST OF CHEMICALS
The following list of chemicals, although not all-inclusive, are known to attack PES, the material from which a
portion of the sonic liquid level sensor is made.
Prolonged submergence of the sensor should be avoided.
After submergence in any of these chemicals, a thorough cleaning of the sensor head should be conducted to
prolong sensor life.
*ACETALDEHYDE – CH
3
CHO
*ETHYL ACETATE – CH
3
COOC
2
H
5
*ACETONE – CH
3
CHOH
3
*ETHYLENE GLYCOL – HOC
3
H
4
OH
*ANILINE – C
6
H
5
CL
*METHYL ETHYL KETONE – C
2
H
5
COCH
3
BENZALDEHYDE – C
6
H
5
CL
*METHYLENE CHLORIDE – CH
2
CL
2
CHLOROBENZENE – C
6
H
5
CL
NITRO BENZENE – C
6
H
5
NO
2
CRESOL – CH
3
C
6
H
4
OH
*PHENOL – C
6
H
5
OH
*CYCLOHEXANONE – C
6
H
10
O
*PYRDINE – C
5
H
5
OH
DICHLOROBENZENE – C
6
H
4
CL
2
TOLUENE – C
6
H
5
CH
2
1,2 DICHLORETHANE – CH
2
CLCH
2
CL
TRICLOROETHYLENE – CLCH:CCL
2
*These chemicals are known to be water soluble, ranging from very to slightly; while this information is
useful in sensor cleaning procedure, it will also make interface readings less accurate. In such case, good
interface readings will depend upon the relative specific gravities involved. In the extreme case of
dissolved water within a cargo, and upon ullage gauging of these chemicals, a beeping tone will be
heard instead of the normal steady horn tone. This sensor response should not be interpreted as a
malfunctioning unit.
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