Gems Sensors SeriesLevel Switch
Large Size – Engineered Plastics, Our Most Economical Large Size Unit
Quick Specs...
- NSF Approved All-PVC Wetted Parts Available
- 1 to 7 Actuation Levels
- Lengths to 60 inches
Overview / Design Principle:
Inexpensive, all-PVC LS-800PVC Series switches bring reliable level sensing to corrosive liquids. These durable, yet economical, switches use the same high-quality, dependable reed switches found in GEMS’ most expensive models. NSF-approved wetted parts make the LS-800PVC suitable for potable water applications.
Mounting Types:
Each mounting type can be configured with stem lengths (Lo) and float material indicated in the table below.
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Type 3
2" NPT
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Type 4
3", 150# Flange
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| Mounting and All Wetted Parts |
PVC |
| Operating Temperature |
0°F to 125°F (-17.8°C to 51.7°C) |
| Pressure, PSI, Max. |
15 @ 70°F (21.1°C) |
| Max. Length Lo |
60 inches (152.4cm) |
| Mounting Position |
Vertical +30° Inclination |
Float Types:
| Part Number |
Float Material |
M" Liquid Specific Gravity |
| 16306 |
PVC* |
.85 |
| 142251 |
Buna N |
.80 |
*Select for potable water applications.
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; see below.
| Group I Wiring |
1 to 7 Actuation Levels |
| Group II Wiring |
1 to 4 Actuation Levels |
| Group III Wiring |
1 to 3 Actuation Levels |
| Group IV Wiring |
1 to 2 Actuation Levels |
| Switch (N.O. or N.C.) |
SPST: 20 VA or 100 VA |
| SPDT: 20 VA |
| Lead Wires |
#22 AWG, 24 " L., PVC |
Typical Wiring Diagrams
For clarity, only two actuation levels are shown in each group diagram.
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Group I SPST
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Group II SPST
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Group III SPDT
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Group IV SPDT
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Wiring Color Code
| SPST Switches |
SPDT Switches 20 VA |
| Wiring |
Group I |
Group II |
Group III |
Group IV |
| Com. Wire |
Black |
None |
Black |
None |
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NO/NC |
SW. Com. |
NO/NC |
NO |
NC |
SW. Com. |
NO |
NC |
| L1 |
Red |
Red |
Red |
Red |
Wh/Red |
Red |
Wh/Red |
Wh/Blk/Red |
| L2 |
Yellow |
Yellow |
Yellow |
Yellow |
Wh/Yel |
Yellow |
Wh/Yel |
Wh/Blk/Yel |
| L3 |
Blue |
Blue |
Blue |
Blue |
Wh/Blue |
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| L4 |
Brown |
Brown |
Brown |
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| L5 |
Orange |
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| L6 |
Gray |
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| L7 |
White |
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Actuation Level Dimensions
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Switch actuation levels are determined following the guidelines:
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| A |
1-1/2 " (38.1 mm) Minimum distance to highest actuation level. |
| B |
2" (50.8 mm) Minimum distance from end of unit to lowest actuation levels. |
| C |
3-1/2 " (76.2 mm) Minimum distance between actuation levels. |
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L1 thru L7 actuation level distances and Lo (overall unit length) are measured from inner surfaces of mounting plug or flange.
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Lo (Length overall) = L1 + Dimensions D . See mounting typesfor maximum length values.
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Notes:
1. Actuation levels are calibrated on descending fluid level, with water as the calibrating fluid, unless otherwise specified.
2. A and B dimensions based on a top mounted unit.
3. Float stops are permently cemented in place.
4. Tolerance on actuation levels is +1/8" (3.2 mm)
5. Dimensions based on a liquid specific gravity 1.0. |
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