OTTO Limit Switches
The P6 limit switch
Limit switches are electromechanical devices used to detect the presence or absence of an object or to monitor and control the movement limits of a machine. They act as a sensor to detect the physical movement and position of machinery parts, typically initiating or stopping an action by opening or closing an electrical circuit when a specified limit is reached.
OTTO’s Limit Switch -the P6- is known for its robust and precise performance in various industrial applications. The P6 series limit switches are engineered to provide reliable detection and control in challenging environments, ensuring high accuracy and durability.
Applications, Challenges, Solutions
OTTO Controls’ P6 limit switches are versatile and robust, making them suitable for a wide range of applications across various industries in harsh environments.
- Industrial Equipment: Industrial Machinery, Construction & Agricultural Equipment, Material Handling, & Packaging
- Automotive Industry
- Mil/Aero: Aircraft controls, Military Vehicles, & Weapon Systems
- Medical Devices
- Renewable Energy
Harsh Environmental Conditions – Many industrial environments expose equipment to dust, moisture, extreme temperatures, and other harsh conditions
Precision & Accuracy – Accurate detection and control of machine parts’ position are crucial for ensuring efficient and safe operation
Mechanical Stress and Durability– Equipment in heavy-duty industrial applications is often subjected to significant mechanical stress and wear.
Space Constraints- Some applications require components to fit into tight or limited spaces
Versatility in Applications– Different industries and applications have unique requirements and operating conditions.
Safety and Compliance– Ensuring safety and meeting regulatory compliance in critical applications, such as aerospace and medical devices.
Maintenance and Downtime– Frequent maintenance and downtime can be costly and disrupt operations.
The P6-4 series switches
are commercial grade limit switches that are water tight and completely sealed to IP68S and IP69K. They are designed to be operated in extreme temperature ranges and with their stainless steel housing, are for use in the most rugged, harsh environments. These switches are available with either a ball or roller plunger actuation method. In addition, these switches can be configured as single pole and double pole plus single throw and double throw. The P6-4 offer three connection methods, solder or screw terminal plus flying wire leads.
FEATURES:
- Sealed watertight to IP68S and IP69K
- One-piece Stainless Steel housing
- Built to withstand extreme temperatures
- Choice of ball or roller plunger
- Three connection method options
Specs
Drawings
Resources:
P6-4 Datasheet
P6 series switches are 
sealed against immersion and corrosive atmospheres. These switches are designed for rugged duty both mechanically and electrically. A one-piece stainless steel or nickel plated brass housing, sealed at the plunger with an O-ring seal and at the base with a glass-to-metal header option provides true environment-free sealing to comply with MIL-PRF-8805/39, MIL-PRF-8805/40, MIL-PRF-8805/43, and MIL-PRF-8805/100. Most case parts are grounded for EMI reduction.
The P6 series is available with roller plunger styles for cam or slide actuation and pin plunger for in-line actuation. Contact Heilind for additional designs.
P6 series features the OTTO B2, B3 or B5 series snap-action basic switch. High contact pressure and unique contact design provides low contact resistance for low level switching as well as full rated service.
FEATURES:
- Complies with MIL-PRF-8805 sealing
- One-piece housing
- Sealed at plunger with O-rings
- Sealed at base with a glass seal
- EMI reduction construction
- Choice of pin or roller plunger
- Choice of axial or radial leads
Specs
Drawings
Resources:
These subminiature sealed switches are contained in a rugged aluminum housing with choice of lever, roller or plunger. Featuring the B5 series basic switch, the P6-3 series is able to switch up to 10 
amps. The high contact pressure and superior wiping action of the OTTO design also makes the P6-3 series an excellent choice when switching logic level loads.
Sealing against water and other liquids is per MIL-PRF-8805. Wire leaded models feature potted leads. The solder terminals are epoxy sealed.
FEATURES:
- Compact design
- Watertight to MIL-PRF-8805
- Choice of four actuator styles
- Choice of wire lead or solder termination styles
- Up to 10 amps switching capability
- High contact pressure for low levels
- Precision operating points
Drawings:
Resources:
These subminiature sealed switches are contained in a rugged aluminum housing with choice of lever, roller or plunger. Featuring the B5 series basic switch, the P6-3 series is able to switch up to 10 amps. The high contact pressure and superior wiping action of the OTTO design also makes the P6-3 series an excellent choice when switching logic level loads.
Sealing against water and other liquids is per MIL-PRF-8805. Wire leaded models feature potted leads. The solder terminals are epoxy sealed.
Features:
- Compact design
- Watertight to MIL-PRF-8805
- Choice of four actuator styles
- Choice of wire lead or solder termination styles
- Up to 10 amps switching capability
- High contact pressure for low levels
- Precision operating points
Specs:
P6 series switches are 
The P6 series is available with roller plunger styles for cam or slide actuation and pin plunger for in-line actuation. Contact factory for additional designs.
P6 series features the OTTO B2, B3 or B5 series snap-action basic switch. High contact pressure and unique contact design provides low contact resistance for low level switching as well as full rated service.
Features:
- One-piece housing
- Sealed at plunger with O-rings
- Sealed at base with a glass seal
- EMI reduction construction
- Choice of pin or roller plunger
- Choice of axial or radial leads and with or without connectors
Drawing:
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