Product Overview

indicator is tested for proper color change ability in the lab
-
oratory and twice more during assembly.
The indicator is a porous filter paper impregnated with a
chemical salt that is sensitive to moisture. The salt changes
color according to the moisture content (relative saturation)
in the refrigerant. A dark green color indicates the refriger-
ant is DRY and yellow indicates a WET condition. The indi-
cator is formulated so that it changes color at the moisture
levels generally accepted as the safe operating range.
The See•All calibration information in Table 1 is based on
detailed experimental data for Refrigerants 12, 22, 134a,
404A, 407C, 410A, 502 and 507. The calibration information
on other refrigerants was obtained from a comparison of
their properties with these refrigerants. For Refrigerants
123, 401A and 402A; Refrigerant 22 moisture calibration is
suggested. For Refrigerant 11 use Refrigerant 12 data and
for Refrigerants 113 and 114 use Refrigerant 502 values.
For other refrigerants, contact Sporlan Valve.
FOR AIR — Tests on air show that the See•All changes color
in the range of
0.5% to 2.0% R.H. In ordinary air lines this
means that the See•All will change color at dew points in
the range of minus 40°F to minus 60°F.
See•Alls with 1/4” through 1-1/8” ODF Solder connections
are constructed with long fittings made from either heavily
copper plated steel or copper. Both fitting types are suitable
for soldering or brazing using any of the common alloys,
such as silver solder
, soft solder
, Sta-Brite, or Sil-Fos or
PhosCopper. These See•Alls do not require disassembly in
the field for brazing because the extended fittings reduce
the possibility of damaging the moisture indicator element
when the See•All is brazed into the system. T
o prevent
damaging the See•All ensure ample heat is supplied to the
fittings and point the torch tip away from the See•All body.
Proper brazing technique ensures proper capillary action of
the alloy
.
The ODF Solder connections on the See•All are clean when
shipped. Polishing the inside of the fittings before brazing is
unnecessary, and could be harmful on the copper plated
steel fittings if an excessive amount of copper plating is
removed. See•Alls with 1/4” through 1-1/8” ODF Solder fit-
tings stated in this publication are with copper plated steel
fittings. Contact Sporlan Valve if copper fittings are desired
on these models.
The larger See•Alls with 1-3/8”, 1-5/8”, and 2-1/8” ODF
Solder connections utilize copper connections and require
The Sporlan See•All Moisture and Liquid Indicator combines
the two functions of moisture and liquid indication into a sin-
gle economical product. It takes the guess work out of servic-
ing refrigeration and air conditioning equipment. The See•All
assists the technician in determining the state of the circulat-
ing refrigerant at a particular location and if a safe moisture
level exists in the system. Excessive moisture in refrigerant
systems can cause unwanted chemistries such as hydrolysis of
lubricants and other materials, corrosion of metals, copper
plating, ice formation at the meeting device and a chemical
change in the motor insulation of a hermetic compressor.
ONE INDICATOR for all REFRIGERANTS — provides a true
moisture indication for Refrigerant 12, 134a, 22, 404A,
407C, 410A, 502 or 507.
RELIABLE and ACCURATELY CALIBRATED COLOR
CHANGE POINTS
— in parts per million of moisture for
each refrigerant.
REPLACEABLE INDICATOR ELEMENT — the color indicator
paper can be changed on fused glass models manufactured
since 1984 without removing the See•All from the line.
INDICATOR PROTECTED from DISCOLORATION
and DIRT
— by a filter pad and screen. This prevents wash-
ing of the indicator by the refrigerant and protects it from
system contamination and turbulence.
COLOR CHANGES ARE EASILY DISTINGUISHED and
REVERSIBLE
— indicator colors differ so widely between the
wet and dry condition, there is no possibility of confusion.
Colors reverse as often as moisture concentration in the sys-
tem changes.
LARGE FULL VIEW SIGHT GLASS — extra large crystal
clear sight glass for viewing the refrigerant. Bubbles indicate
a shortage of refrigerant or a restriction in the liquid line.
DISASSEMBLY FOR INSTALLATION IS UNNECESSARY —
with extended fittings on small size solder models. See•Alls
are easy to braze.
PLA
S
TIC CAP
— is supplied with See•All to keep the glass
free from dust, dirt and grease.
The plated steel and copper fittings are copper brazed to the
heavily copper plated steel body. A glass disc is inserted in
the body and heated just to the melting point under careful
-
ly controlled conditions. This
fuses the glass t
o the body
in
a permanent leak-free joint. The indicator paper (retained in
a small brass ferrule) is inserted from the back and held in
place with a slotted cylinder. The slotted cylinder and indica-
tor assembly is mounted on a post that screws into the bot
-
tom of the body
, and seals with a knife-edge joint. This
overall construction is highly effective in preventing refriger-
ant leakage. The unit is painted to protect it from corrosion.
Paper indicator elements are made in the Sporlan laborato-
ry under the strictest quality control procedures. The
P
age 2
\ Bulletin 70-1
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MOISTURE & LIQUID
INDICA
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Figure 1
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