E-Series Waterproof Limit Switches – Stainless Precision for Military and Industrial Control
When reliability defines success, CPI’s E-Series Waterproof Limit Switches set the benchmark for performance in harsh, mission-critical environments.
Fully constructed from 304 stainless steel, these limit switches combine mechanical resilience, chemical resistance, and long-term sealing integrity for field equipment, vehicles, and machinery exposed to moisture, shock, and vibration.
Rugged Construction, Engineered Versatility
Every model in the E-Series uses CPI’s proven low-button basic switches (B2–B9 families), integrated into robust stainless enclosures with sealed actuators.
Each configuration is customizable — allowing selection of lever type, roller material, travel distance, and electrical rating.
With achieved lifetimes exceeding five million mechanical cycles, these switches outperform typical industrial-grade components by orders of magnitude.
Model Overview and Comparison
| Model | Mounting Type | Actuator Type | Roller Material | Seal Material | Operating Temp. | Typical Use |
|---|---|---|---|---|---|---|
| E1092 | Right-angle mount | Simulated roller lever | Stainless steel | Stainless enclosure | –40 °C to +105 °C | Compact limit detection, interlocks, vehicle door sensors |
| E1117 | Right-angle mount | Roller lever | Delrin® (low-friction acetal) | Santoprene® thermoplastic | –40 °C to +105 °C | Hydraulic or mechanical feedback, industrial automation |
| E1134 | Flush-mount | Straight lever with roller | Nylon® | Neoprene (extended range) | –54 °C to +74 °C | Military and outdoor systems, embedded control points |
Performance Highlights
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Electrical Rating:
5 A resistive / 3 A inductive @ 28 VDC or 120 VAC
(custom 10 A / 15 A versions available) -
Electrical Configuration: SPDT standard
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Mechanical Life: 100,000 – 5,000,000 cycles (per configuration)
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Construction: Heavy-gauge 304 stainless-steel body, waterproof design
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Sealing Integrity: Resistant to salt spray, dust, sand, oil, and chemicals
Precision in Motion
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E1092 – Compact simulated-roller assembly ideal for tight installations and right-angle sensor brackets. Often used as cab down, door, or hopper detect switches.
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E1117 – Equipped with a Delrin roller lever, delivering smooth actuation and low wear in repetitive motion systems — perfect for valve sensing, interlocks, and seat detection.
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E1134 – Designed for flush-mount applications where protection and minimal protrusion are essential. The nylon roller and neoprene seal make it ideal for military vehicles, marine systems, and outdoor equipment.
Applications
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Outrigger, boom, and valve position sensing
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Operator presence and seat detection systems
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Door interlock and safety feedback loops
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Return-to-dig or park-brake monitoring
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Cab, hatch, or compartment status detection
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Marine and defense equipment controls
Built to Endure
With mil-spec sealing, stainless construction, and electromechanical endurance proven beyond 5 million cycles, CPI’s E-Series Limit Switches deliver absolute reliability in the most severe environmental conditions — from military vehicles to industrial automation systems.