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Custom Level Switches - LS-700 Series
Combines Durability of Metal With a Compact Design for Restricted Spaces
Quick Specs...
- Stainless Steel or Brass Mountings and Stems
- 1 to 5 Actuation Levels
- Lengths to 48 inches
- U.L. Recognized; CSA Listed Versions Available
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Overview / Design Principle:
These compact units feature the rugged durability of stainless steel or
brass construction in a lightweight package. Ideal for tanks less than
4 feet. LS-700 Series switches are exceptionally versatile because of
the many useful options available. Described briefly below, these
options can extend the functionality of your GEMS LS-700 Series custom
switch.
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Mounting Types:
Each mounting type can be configured with stem lengths Lo and float materials indicated in the table below.
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Type 2
3/4" NPT |
Type 3
1" NPT |
Type 4
3-5/8" dia. flange |
Type 5
1-5/16"-12UNF-2A |
Type 6
3/8"-24 |
No Mounting |
Mounting Types 2 & 3 are available with a 1/2" MNPT conduit adaptor.
Note: Sanitary flange mountings are also available, but not shown. Please contact factory.
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| Stem and Mounting Material |
Brass or Stainless Steel |
| Max Length (Lo) |
48 inches (121.9 cm) - 21" Max On Bent Stem Versions (Consult Factory) |
| Mounting Position |
Vertical ± 30 degrees Inclination |
| Float Stops * |
Brass Units: Berylilum Copper Grip Rings; Stainless Steel Units: S.S. ARMCO PH-15-7MO Grip Rings |
| Pressure Rating, PSI, Max.** |
See Float Value on Following Page |
* In some instances, concentrations of
chlorine and other corrosive compounds in the media require the use of
collar type float stops. Consult factory for details.
** Mounting only. Maximum pressure rating for complete unit will be the
lower of this pressure or the selected float pressure (see Float Types,
on next page).
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Float Types:
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39049 |
138030 |
133764 |
60241 |
141750 |
156900 |
136550 |
158369 |
A single float type is selected for use at all actuation points.
Part Number |
Float Material |
Compatible Mounting Types |
Operating Temperature |
Pressure,
PSI, Max. |
M" Liquid Specific Gravity |
39049 |
Buna N |
1, 3, 4, 5, 6, 7 |
Water: to 180°F (82.2°C)
Oil: -40°F to 250°F (-40°C to 121.1°C) |
300* |
.50 |
138030 |
Buna N |
1, 2, 3, 4, 5, 6, 7 |
250* |
.60 |
133764 |
Teflon |
1, 2, 3, 4, 5, 6, 7 |
-40°F to 300°F (-40°C to 148.9°C) |
1000* |
.65 |
60241 |
316 S.S.** |
1, 4, 6 |
100 |
.70 |
141750 |
316 S.S.** |
1, 3, 4, 5, 6, 7 |
275 |
.90 |
156900 |
316 S.S.** |
1, 4, 5, 6, 7 |
600 |
.90 |
136550 |
316 S.S.** |
1, 2, 3, 4, 5, 6, 7 |
400 |
1.10 |
158369 |
304 S.S. |
1, 2, 3, 4, 5, 6, 7 |
150 |
.85 |
| 145730 |
Polypropylene |
1, 3, 4, 5, 6, 7 |
-40°F to 225°F (-40°C to 107°C) |
50 |
.60 |
*De-rated with increasing temperature.
** 316 Stainless Steel floats are available with ceramic potting that
allows temperatures to 500°F (260°C); contact factory for these
high-temperature floats.
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Electrical:
Typically, one float is required for each point at which you need a
switch action to occur. The number of actuation levels available
depends on the Group Type Wiring selected.
| Group I Wiring |
1 to 5 Actuation Levels |
| Group II Wiring |
48 inches (121.9 cm) - 21" Max On Bent Stem Versions (Consult Factory) |
| Switch (SPST, N.O. or N.C.) |
20 /100 VA. |
| Lead Wires |
#22 AWG, 24"L., Teflon |
| Approvals |
LS-700 Series switches are U.L. Recognized - File No. E45168; CSA Listed - 30200. |
Typical Wiring Diagrams
For clarity, only two actuation levels are shown in each group diagram.
Notes:
1. Units with 100 VA switches are not U.L. Recognized or CSA Listed. |
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| A |
Minimum distance to highest actuation level. |
| B |
Minimum distance between actuation levels. |
| C |
Minimum
distance between two actuation levels with one float (Note: One float
for two levels can be used only when low level is N.C. dry and high
level is N.O. dry). |
| D |
Minimum distance from end of unit to lowest level. |
L1, L2, L3, L4 & L5 actuation level distances and Lo (overall unit length) are measured from inner surfaces of mounting plug or flange.
Lo (Length overall) = L1 + Dimensions D . See mounting types for maximum length values.
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Dimensions |
| Part Number |
A |
B |
C |
D |
| 39049 |
7/8" (22.2 mm) |
1-3/4" (44.4 mm) |
1/8" (3.2 mm) |
3/4" (19.1mm) |
| 156900 |
3/4" (19.1 mm) |
1-7/8" (47.6 mm) |
1/8" (3.2 mm) |
1-1/16" (27.0 mm) |
| 138030 |
15/16" (23.8 mm) |
2-1/16" (52.4 mm) |
1/8" (3.2 mm) |
1" (25.4 mm) |
| 60241 |
3/4" (19.1 mm) |
1-13/16" (46.0 mm) |
1/8" (3.2 mm) |
15/16" (23.8 mm) |
| 141750 |
13/16" (20.6 mm) |
2" (50.8 mm) |
1/8" (3.2 mm) |
1-1/18" (28.6 mm) |
| 158369 |
13/16" (20.6 mm) |
2-7/16" (61.9 mm) |
1/8" (3.2 mm) |
1-3/4" (44.4 mm) |
| 136550 |
9/16" (14.3 mm) |
2-7/16" (61.9 mm) |
1/8" (3.2 mm) |
1-3/4" (44.4mm) |
| 133764 |
15/16" (23.8 mm) |
1-7/8" (47.6 mm) |
1/8" (3.2 mm) |
7/8" (22.2 mm), N.O.
1-3/16 " (30.2 mm), N.C. |
| 145730 |
7/8" (22.2 mm) |
1-7/16" (36.5 mm) |
1/8" (3.2 mm) |
7/8" (22.2 mm) |
Notes:
1. A, B and D dimensions based on a liquid specific gravity of 1.0.
2. Tolerance on actuation levels is ±1/8" (3.2 mm).
3. For bent stem versions, please request drawing LS-77700. |
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