Gems Sensors Series Level Switch
Large Size – Engineered Plastics, Features Inert Materials for Corrosive Liquids
Quick Specs...
- All-Plastic Wetted Parts - PVC, Polypropylene or PVDF
- 1 to 6 Actuation Levels
- Lengths to 70 inches
Overview / Design Principle:
Specifically designed for corrosive liquids and vapors. Three standard model types in a choice of materials offer broad chemical compatibility.
How To Order:
To Request a Quote: Use the information on this page to complete our online checklist. Gems will promptly provide you with a quotation for your specific application.
Mounting Types:
Each mounting type can be configured with stem lengths (Lo) and materials indicated in the table below. Floats and float stop collars are of same material specified for mounting.
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Type B
3 " NPT
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Type C
3", 150# Flange
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| Stem, Mounting, Float and Collar Material |
PVC, Polypropylene or PVDF |
| Operating Temperature |
Max. Length (Lo) |
| Mounting Position |
Vertical +30° Inclination |
Float Types:
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PVC
.60 Sp. Gr.
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Polypropylene
.40 Sp. Gr.
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PVDF
.75 Sp. Gr.
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Note: Floats are alwys supplied in same material as specified for mounting
Temperature and Pressure Ratings Chart
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Operating Temperature |
| Material |
0°F (-17.7°C) |
70°F (21.1°C) |
100°F (37.7°C) |
125°F (60.0°C) |
140°F (60.0°C) |
| PVC |
50 PSI (3.4 bar) |
50 PSI (3.4 bar) |
35 PSI (2.4 bar) |
20 PSI (1.4 bar) |
10 PSI (0.68 bar) |
| Polypropylene |
50 PSI (3.4 bar) |
50 PSI (3.4 bar) |
40 PSI (2.7 bar) |
35 PSI (2.4 bar) |
30 PSI (2.0 bar) |
| PVDF |
50 PSI (3.4 bar) |
50 PSI (3.4 bar) |
45 PSI (3.1 bar) |
40 PSI (2.7 bar) |
35 PSI (2.4 bar) |
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
| Switch (N.O. or N.C.) |
| SPST |
20 VA 0r 100 VA |
| SPDT |
20 VA |
| Lead Wires |
20 VA |
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 |
Blue |
Wh/Blue |
Wh/Blk/Blu |
| L4 |
Brown |
Brown |
Brown |
Brown |
Wh/Brn |
Brown |
Wh/Brn |
Wh/Blk/Brn |
| L5 |
Orange |
Orange |
Orange |
Orange |
Wh/Orn |
Orange |
Wh/Orn |
Wh/Blk/Orn |
| L6 |
Gray |
Gray |
Gray |
Gray |
Wh/Gra |
Gray |
Wh/Gra |
Wh/Blk/Gra |
Actuation Level Dimensions
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Switch actuation levels are determined following the guidelines:
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| A |
2-1/6 " (52.4 mm) +1/16" minimum distance to centerline if float (ref. mounting). |
| B |
2-11/6 " (68.3 mm) +1/16" minimum distance to centerline if float (ref. stem end). |
| C |
3-1/2 " (88.9 mm) minimum distance between actuation levels. |
| D |
Distance between actuation levels using one float.
Mininmum =1/4" (6.3 mm)
Maximum =3-1/2" (88.9 mm)
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L1 thru L6 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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† Bottom support recommended for units longer than 36 inches, or in apllications having turbulent conditions.
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Notes:
1. The centerline of the float is used as a standard reference for actuating the switches.
2. All levels are set on desecending float ravel with overtravel =1/4" (6.3mm) +1/8" (3.2mm) m"
3. Tolerance on all actuation levels is +1/8" (3.2mm) Ref.
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