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Switches and position Sensors
Switches and position Sensors
This technical guide by Crouzet details their detection and sensing products, focusing on hermetically sealed microswitches and limit switches. It provides specifications, applications, and customization options for these components.
- Hermetically Sealed Microswitches: Designed for extreme environments, operating between -55°C to 150°C, and up to 250°C for certain types. They withstand vibrations up to 80 G and shocks up to 200 G.
- Performance Characteristics: Switching power ranges from 1 mA to 7 A, with a hermetic seal and a lifespan of 200,000 cycles, suitable for aerospace, marine, and nuclear industries.
- Mechanical Strength: Performance is maintained under varying pressures and temperatures, with graphs illustrating changes in operating force.
- Mechanical Position Detectors: Custom solutions for specific applications, including limit switches for aircraft functions.
- Electronic Position Detectors: Proximity sensors and switches for high-pressure environments and specific functions like cargo loading systems.
- Forces, Positions, Travel: Terminology section to aid understanding of technical specifications.
- About Crouzet: A leader in mechatronic components, offering a wide range of products and services globally.
The guide is a valuable resource for understanding Crouzet's detection and sensing products, highlighting their commitment to quality and innovation.
- Pressure and Temperature: Microswitches operate at pressures from 2 to 6 bar and temperatures from -55°C to +250°C.
- Electrical Characteristics: Nominal current ratings include 10 VDC at 0.01 A, 30 VDC at 4 A, and 220 VAC at 1 A for resistive loads.
- Mechanical Characteristics: Max operating force varies from 2 N to 60 N, with a service life of up to 100,000 operations.
- Ensure proper installation by considering dimensions and connection types.
- Adhere to specified operating conditions for optimal performance.
- Products are sealed to IP 66 standards, ensuring protection against dust and water ingress.
- Dielectric strength and insulation resistance are specified for safety and reliability.
- Used in critical applications such as thrust reverser door functions and flight control systems.
- Custom solutions available for specific requirements.
- Electrical diagrams and mechanical dimensions illustrate connection types and installation requirements.
- Tables summarize mechanical and electrical characteristics for component selection.
- Impact angle: 6° Max.
- Actuator speed: 150 in/s (4 m/s) Max.
- Shock: < 100 G 11 ms
- Weight: 0.3 lb (130 g) Max.
- Mechanical lifetime: 120,000 Cycles TBC
- Differential travel: 0.010 in (0.254 mm) Max.
- Over travel: 0.118 in (3 mm) Min.
- Operating force: 6-12 lb (27-54 N)
- Full over travel force: 20 lb (90 N) Max.
- Release force: 3.4 lbs (15 N) Min.
- Operating low temperature: -40 °F / -40 °C
- Operating high temperature: +225 °F / +108 °C
- Short-time operating temperature: +225 °F / +108 °C
- Ground survival low temperature: -67 °F / -55 °C
- Ground survival high temperature: +250 °F / +121 °C
- Altitude: -2,000 to +55,000 feet
- Temperature variation: Category A
- Humidity, Waterproofness, and Icing: CET Method I or II test
- Operational shock: Category A
- Crash shock: Category A
- Vibration: Category R, Curve W
- Explosion: Environment I, Category A
- Fluid susceptibility: Category F
- Sand and Dust: Category D
- Fungus resistance: Category F
- Salt fog: Category T
- Magnetic effects: Category Z
- Power input: Category A
- Voltage spike: Category A
- Audio frequency conducted susceptibility: Category Z
- Induced signal susceptibility: Category Z
- Radio frequency susceptibility: Category W
- Emission of radio frequency energy: Category H
- Lightning-induced transient susceptibility: Category A4 / C4
- ESD susceptibility: Category A
- Flammability: Category A
- Minimum operational voltage: 12 VDC
- Nominal operational voltage: 28 VDC
- Maximum operational voltage: 32 VDC
- Close circuit current: 2 mA to 10 mA
- Min. Open circuit resistance (dry): 50 KΩ
- Max. Closed circuit resistance: 30 Ω
- Bonding resistance (connector housing to switch body): 2.5 mΩ new, 10 mΩ field service
- Contacts: Gold, hermetically sealed
- Insulation resistance: 100 MΩ min at 68 °F (20 °C) at 500 V DC for 60 sec.
- Dielectrical withstanding: 1,060 V rms / 50-60 Hz / 60 s (ІI < 1 mA)
- Sealing: Watertight: MIL PRF 8805 S3
- Part numbers: DDP770375, DDP990202, DDP770384, DDP771009, DDP770345, DDP770348
- Materials: Roller material: CuNi14Al2, Plunger stainless steel, Housing stainless steel AISI 303
- Connectors: EN2997-Y00803M6, EN2997-Y00803MN
- Marking: Laser marking
- Limit switch for thrust reverser door stow function
- Limit switch for thrust reverser maintenance test enable function
- Limit switch for thrust reverser actuator function
- Limit switch for trimmable horizontal stabilizer actuator (THSA) function
- Limit switch for slat function
- Limit switch for thrust reverser door deploy function
- Temperature: Operates between -67°F to +257°F, with ground survival temperatures ranging from -62°C to +85°C.
- Altitude: Capable of functioning at altitudes up to 45,000 ft.
- Humidity: Complies with RTCA DO-160C Section 6 Category B.
- Shock and Vibration: Meets operational shock requirements of RTCA DO-160C Section 7 Category B and vibration standards of Section 8 Category H2.
- Explosion and Waterproofness: Explosion proof as per RTCA DO-160C Section 9 Category E2 and waterproof according to Section 10 Category R.
- Other Environmental Factors: Resistant to sand, dust, fungus, salt spray, and icing as per respective RTCA DO-160C sections.
- Operating Force: 6 to 12 lbs, with a maximum overtravel force of 20 lbs.
- Travel Specifications: Pretravel max 0.04 inch, differential travel max 0.02 inch, overtravel min 0.125 inch.
- Lifetime and Weight: Mechanical lifetime of 100,000 cycles, weighing up to 300 g.
- Voltage and Current: Normal operating voltage is 28 VDC, with a maximum of 32 VDC. Current ranges from 10 mA to 100 mA.
- Resistance and Insulation: Contact resistance is 125 mΩ max, with insulation resistance of 100 MΩ at 500 VDC.
- Dielectric Strength: Withstands 1,000 VRMS at atmospheric pressure.
- Sealing: Product is watertight with hermetic cell sealing.
- Design: Includes a braided shield grounded to the body of the switch for 360° protection.
- Applications: Suitable for thrust reverser actuator functions and other demanding environments.
The document discusses proximity switches as alternatives to mechanical switches for detecting parts with short displacements or in confined spaces. It distinguishes between one-piece and two-piece proximity sensors, emphasizing separation for improved reliability.
- Keep Off Zone: Ferromagnetic or conductive metallic parts must be kept away from the sensing face to maintain detection performance.
- Target Movement: Describes head-on and slide-by movements, detailing how the switch output changes based on the target's proximity.
- Hysteresis and Grey Zone: Hysteresis prevents random switching due to vibrations, while the grey zone accounts for tolerances and temperature variations.
Detection curves are plotted based on target movements, ensuring consistent performance across different units.
The target's material and dimensions are predefined, often using ferromagnetic metals like stainless steel.
- Two-Piece Sensors: Use twisted pair cables, preferably shielded, for EMI protection.
- One-Piece Switches: Can use shielded and twisted 3-wire or 2-wire cables.
Detailed specifications for various proximity sensors, including operational temperature ranges and dielectric strength.
Includes figures illustrating measurement chains, keep-off zones, and detection curves.
This document provides specifications for proximity switches used in aerospace applications, particularly for landing gear and cargo loading systems.
- Temperature Range: Operating temperatures range from -55°C to +95°C, with survival temperatures extending to +120°C.
- Altitude: Compliant with RTCA DO-160D Section 4, capable of operating at altitudes up to 51,000 ft.
- Material: Constructed from stainless steel.
- Weight: Varies by model, with a maximum of 120 g.
- MTBF: Mean Time Between Failures is 400,000 hours.
- Humidity: Meets RTCA DO-160D Section 6 Category C standards.
- Vibration and Shock: Compliant with RTCA DO-160D Section 8 and Section 7.
- Waterproofness: Rated under RTCA DO-160D Section 10 Category S.
- Sand and Dust: Resistant as per RTCA DO-160D Section 12 Category D.
- Fungus and Salt Spray: Resistant to fungal growth and salt spray.
- Supply Voltage: Operates between 14 VDC and 32.5 VDC.
- Current Consumption: Maximum of 10 mA under 32.5 VDC.
- Switching Frequency: Up to 100 Hz.
- Insulation Resistance: 100 MΩ at 45 VDC.
- Dielectric Strength: 500 VDC / 1 mA.
- Protection: Includes safeguards against polarity inversion and load short circuits.
- Connector Type: Various models use connectors like D38999.
- Tightening Torque: Maximum of 20 Nm.
Designed for critical aerospace functions, including landing gear and cargo loading systems.
This document provides specifications for proximity switches used in landing gear and thrust reverser actuator functions.
- Operating temperature ranges from -40°C to +70°C.
- Supply voltage ranges from 17V to 32.5V.
- Output characteristics include a maximum current of 25 mA.
- Insulation resistance is specified at 100 MΩ minimum at 45 VDC.
- Protections include inversion of polarity and permanent short circuit of the load.
- Weight is specified at 145 ±10 g.
- Dimensions and connector specifications are provided.
- Actuation distance is specified at a minimum of 4 mm.
- Output configurations are detailed for different target detection scenarios.
- Complies with RTCA/DO-160D standards.
- Shock resistance is specified at 100 G/11 ms.
- Proximity switches must be connected with AWG24 minimum shielded twisted wires.
- Detailed connection diagrams and part numbers are provided.
- Includes a disclaimer regarding the accuracy of the information.
- Contact information for Crouzet's global offices is provided.
Catalog excerpts
DETECTION & SENSING Technical Guide
Open the catalog to page 1
100 YEARS MANUFACTURING THE FUTURE Together STANDARDS TECHNICAL BASIS Limit Switch for thrust reverser door Upper Se condary Lock function. 8 4 Crouzet’s customers and partners can rely on our teams worldwide to always meet and often exceed their expectations. Driven by innovation, our experts are focused on designing and delivering the right product for the right application. Limit Switches Based on hermetically sealed microswitches (250 °C).15 Limit Switches Based on hermetically sealed mic roswitches (150 °C).16 Crouzet is your trusted partner of choice to face the industrial challenges of...
Open the catalog to page 2
ICROUZET.COM |4 | DETECTION & SENSING ICROUZET.COM |5 | DETECTION & SENSING A RANGE OF PRODUCTS ADAPTED TO THE DEMANDS OF THE MARKET OF DETECTION AROUND TH E WORLD In order to best serve a large diversity of applications, Crouzet offers a wide range of standard products. From the 1-pole simple plunger switch to the 3-pole adjustable-roller plunger switch, also Crouzet offers a complete range of high-performance products which optimise volume and weight whilst functioning over a wide current range from 1 mA to 7 A. Our extensive range is also aimed at cost reduction and rationalized stock control,...
Open the catalog to page 3
HERMETICALLY SEALED M ICROSWITCH TYPES 83 151 (-55 °C TO 150 °C) Inert gas filling Solder Compressed glass seal DISTINCTIVE CHARACTERISTICS This is the basic component for our whole range of standard 1-pole and 2-poIes hermetically-sealed limit switches plus the 3-poIes version (special Limit Switches). The Crouzet hermetic microswitch combines a snap-action switching system with high resistance to shock and vibration in an hermetically sealed miniature case which encloses an atmosphere of inert gas around its contacts, ideal for switching very Iow level circuits and higher currents also. The...
Open the catalog to page 4
ICROUZET.COM |8 | DETECTION & SENSING ICROUZET.COM |9 | DETECTION & SENSING HERMETICALLY SEALED MICROSWITCH TYPES 83 151 (-55 °C TO 150°C) Reliability of characteristics Below are two test extracts showing the stability of the essential characteristics over time and as a function of temperature. CONNECTIONS Electrical connections are made through the base, by three ferronickel terminals, with copper core, sealed by compressed glass. Soldered Wired -Epoxy resin coating- Travels and forces Change in the characteristics concerned under a constant load of 25 Newtons applied to the operating device....
Open the catalog to page 5
ICROUZET.COM | 10 | DETECTION & SENSING ICROUZET.COM |11 | DETECTION & SENSING with lateral flange + lever Characteristics Max. Operating force Min. Release force Permitted Overtravel force Positive Overtravel stop Service life Max. Pre-travel Max. Differential travel Min. Overtravel Weight (without wires) STANDARDS TECHNICAL BASIS Dimensions (mm) Add the dimensions of the various connections to find the total dimensions } indicates the wire direction Tripping point Nut h 2.5 x 17 / flat Panel cut-out
Open the catalog to page 6
ICROUZET.COM | 12 | DETECTION & SENSING ICROUZET.COM | 13 | DETECTION & SENSING These variants of the basic type 83 151 feature a compensating system which allow them to be used at pressures above atmospheric. For other characteristics please refer to basic model type 83 151 0 STANDARDS TECHNICAL BASIS
Open the catalog to page 7
ICROUZET.COM |14 | DETECTION & SENSING HERMETICALLY SEALED MICROSWITCHES TYPES 83 151 (250°C)WITHOUT ACCESSORIES (BASIC CELL -55°C TO +250°C) TYPE 83 151 201 LIMIT SWITCHES - BASED ON HERMETICALLY SEALED MICROSWITCHES (250°C) BASIC CELL (-55°C TO +250°C) TYPE 83 151 201 This basic component is the same design as the 83 151 001 standard cell but is adapted for operation in high temperatures up to 250 °C. (1) On soldered connections. for wired connections add 0.18 V per meter. Category 250°, 280° (2) Characteristics at: 0 = 250 °C atmospheric pressure at ground level. Add the dimensions of the...
Open the catalog to page 8
ICROUZET.COM | 16 | DETECTION & SENSING ICROUZET.COM | 17 | DETECTION & SENSING MECHANICAL CAPACITY We have adapted the telescopic sub-assemblies for our hermetically sealed microswitch according to pressure and operating temperature requirements. Our products can therefore be used at atmospheric pressure or in an absolute vacuum and at a temperature of -50°C to +150°C. BASIC CELL (-55 °C TO +150°C) TYPE 83 151 001 Criteria Panel cut-out Dimensions (mm) Add the dimensions of the various connections for the total dimensions indicates the direction of the wires IBall bearing 0 3 Nut h 2 - 11/ flat...
Open the catalog to page 9
ICROUZET.COM |18 | DETECTION & SENSING ICROUZET.COM | 19 | DETECTION & SENSING BASIC SENSITIVE MICROSWITCH TYPE 83 141 002 (-55°C TO +150°C) WITHOUT ACCESSORIES This microswitch is notable for its excellent performance in a very compact space (13 x 10 x 5 mm). It is the basic element of our range of standard 1-pole, 2-pole, 3-pole waterproof Limit Switches, and special 4-pole Limit Switches. The meticulous care taken in the manufacture of this microswitch in terms of assembly processes, cleanliness of components as well as inspection procedures, results in a product which is ideal for operation...
Open the catalog to page 10
ICROUZET.COM | 20 | DETECTION & SENSING ICROUZET.COM | 21 | DETECTION & SENSING WATERPROOF LIMIT SWITCHES TYPE 83 777 BASED ON SENSITIVE MICROSWITCH This range of Limit switches satisfies applications which require lightweight miniature devices without sacrificing mechanical and electrical performance. They are particularly well suited to severe environments such as: Aerospace, Armaments, Marine, etc. The plungers for this range of limit switches are equipped with an ice-scraper seal. BASIC SENSITIVE MICROSWITCH 83 141 002 Simple plunger Characteristics Criteria Nominal current Resistive Inductive...
Open the catalog to page 11
ICROUZET.COM | 22 | DETECTION & SENSING ICROUZET.COM | 23 | DETECTION & SENSING WATERPROOF LIMIT SWITCHES TYPE 83 778 BASED ON SENSITIVE MICROSWITCH This range of Limit switches satisfies applications which require lightweight miniature devices without sacrificing mechanical and electrical performance. They are particularly well suited to severe environments such as: Aerospace, Armaments, Marine, etc. The plungers for this range of limit switches are equipped with orientable roller. BASIC SENSITIVE MICROSWITCH 83 141 002 Plunger with orientable roller in 45° steps Characteristics Max. Operating...
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