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Section 3 Installation
For best results, maintain the pH of the fluid between 6.5 and 7.5. Do not
add additional chlorine without first determining the concentration ratio
that already exists in the fluid supply. Corrosion and degradation of the
circulation components can result from concentration ratios that are too
high. Contact our customer support for additional information.
5°C to 95°C — Distilled Water or Deionized Water (up to 3 MΩ-cm)
Normal tap water leads to calcareous deposits necessitating frequent
circulator decalcification, see table on next page.
Calcium tends to deposit itself on the heating element. The heating
capacity is reduced and service life shortened.
-30°C to 80°C — Water with Glycol
Below 5°C water has to be mixed with a glycol. The amount of glycol
added should cover a temperature range 5°C lower than the operating
temperature of the particular application. This prevents the water/glycol
from gelling (freezing) near the evaporating coil.
Excess glycol deteriorates the temperature accuracy due to its high
viscosity.
-40°C to 200°C — SIL180:
SIL180 is suitable for covering nearly the entire range with just one liquid,
especially when used with the cooling circulators. See next page for
additional information.
Unfortunately SIL180 has a wetting tendency necessitating the occasional
cleaning of the bath cover.
other temperatures:
Thermo Fisher Scientific offers a range of heat transfer fluids for these
temperature control applications.
SYNTH 60 and SYNTH 260:
Synthetic thermal liquid with a medium life span (several months) and
little smell annoyance. See next page for additional information.
SIL 100, SIL 180, SIL 300:
Silicone oil with a very long life span (over 1 year) and negligible smell.
See next page for additional information.
Thermo Fisher heat transfer fluids are supplied with an EC Safety Data
Sheet.
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