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Temperatures of touchable hot surfaces
BS EN 13202:2000 gives the recommended maximum surface temperatures for
different materials at various exposure times (see below)
Your ultrasonic bath can be set so that the cleaning fluid is up to 80°C. This means that
parts of your ultrasonic cleaner will be above the recommended maximum temperature.
If you do operate your ultrasonic cleaner at temperatures above the recommended
maximum, then Ultrawave Ltd advise that you conduct a risk assessment, and if
appropriate fix a "Caution – Hot" warning label to your machine.
The following limit values are based on the harmonized standards –
- BS EN 13202:2000 Ergonomics of the thermal environment - Temperatures of
touchable hot surfaces - Guidance for establishing surface temperature limit
values in production standards with the aid of -
- EN 563: 1994 Safety of machinery - Temperatures of touchable surfaces -
Ergonomics data to establish temperature limit values for hot surfaces.
Materials/time-temp*
uncoated metal
painted metal
enameled metals
ceramics, glass, stone
plastics
wood
Time
1 sec
4 sec
10 sec
parts continuously held in normal use
10 min
8 hr
1 sec
65°C
83°C
74°C
80°C
85°C
110°C
Contact
accidental contact
parts held for short periods
prolonged use
continuous use
4 sec
10 sec
58°C
55°C
64°C
55°C
60°C
56°C
70°C
66°C
74°C
70°C
93°C
89°C
Outer case, tank flange
20
10 min
8 hr
48°C
43°C
48°C
43°C
48°C
43°C
48°C
43°C
48°C
43°C
48°C
43°C
Part
knobs, switches
handles
handles
handles
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