Henry Catalogue 2010 - page 84

Industrial & Commercial Refrigeration Products
800.96.HENRY
®
COMPONENTS
R35
LIQUID LEVEL SWITCHES
Construction
: The switch consists of a sturdy nickel
plated steel body with a built-in fused glass prism. This
allows liquid to be optically detected by a solid state
opto-electronic module. The solid state module is
encapsulated in silicon. It can be easily replaced with-
out disturbing the system. The fused glass prism
provides chemical resistance to all refrigerants and
high pressure ability to withstand typical burst pressure
needs. The switch can be installed on any location in
the refrigeration system where the temperatures do not
exceed the rating in the table above. This includes Oil
Separators, Oil Reservoirs, Refrigerant Receivers and
compressor crankcase applications. The electrical
connection end is suitable for 1⁄2" conduit.
Operation: The S-9400 Series Level Switch uses light
reflecting from a conical glass prism as a means of
detecting the absence of a fluid at the level of the glass
cone. When no fluid covers the lower half of
the cone infra-red light from the module
from the mirror-like inner surface of the cone back to a
light detector signaling the electronic module to switch.
When fluid covers the lower half of the glass cone, the
light from the module passes into the fluid. This absence
of light is detected by the module which switches into the
opposite direction. The module provides a .06/.10 differ-
ential distance from the cone point down.
Optional 1" NPT Connection: A 1" connection is available
for the S-9400 series by ordering with a “-1" suffix (i.e.
S-9424A-1). The 1" pipe thread connection allows the
module to be mounted closer to the inner wall of the tank.
This prevents the fitting from creating a pool of liquid next
to the glass prism which, in certain applications, can be
detrimental to the operation. The 1" connection is also
recommended for Ammonia applications where
residue can build up on the sight glass.
Replacement Sight Glass Part #: 3-020-070
Catalog
Number
Size
M.P.T.
Voltage
Resistive
Rating
Contacts with
Liquid
Present
Wire Color Code
Replacement
Module No.
Min/Max Fluid
Temp. *
S-9400
1/2”
120V 50/60 Hz
.5 Amp
Closed
Yellow & White
2-044-012
-40°F+210°F
S-9400-1
1”
120V 50/60 Hz
.5 Amp
Closed
Yellow & White
2-044-012
-40°F+210°F
S-9400A
1/2”
120V 50/60 Hz
.5 Amp
Open
Yellow & White/Stripe
2-044-017
-40°F+210°F
S-9400A-1
1”
120V 50/60 Hz
.5 Amp
Open
Yellow & White/Stripe
2-044-017
-40°F+210°F
S-9420
1/2”
208/240V 50/60 Hz .25 Amp
Closed
Red & White
2-044-015
-40°F+200°F
S-9420-1
1”
208/240V 50/60 Hz .25 Amp
Closed
Red & White
2-044-015
-40°F+200°F
S-9420A
1/2”
208/240V 50/60 Hz .25 Amp
Open
Red & White/Stripe
2-044-018
-40°F+200°F
S-9420A-1
1”
208/240V 50/60 Hz .25 Amp
Open
Red & White/Stripe
2-044-018
-40°F+200°F
S-9424
1/2”
24V AC/DC
.5 Amp
Closed
Orange & White
2-044-013
-40°F+210°F
S-9424-1
1”
24V AC/DC
.5 Amp
Closed
Orange & White
-40°F+210°F
2-044-013
S-9424A
1/2”
24V AC/DC
.5 Amp
Open
Orange & White/Stripe
2-044-020
-40°F+210°F
S-9424A-1
1”
24V AC/DC
.5 Amp
Orange & White/Stripe
2-044-020
-40°F+210°F
Open
* Actual fluid temperature, not tank temperature
NOTE: Load is to be wired between black and colored leads
S-9400-1 Series
with 1" NPT Connection
1...,74,75,76,77,78,79,80,81,82,83 85,86,87,88,89,90,91,92,93,94,...119
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