20HM1-1

Product Description

Honeywell HM hermetic sealed miniature basic switches are designed for a variety of commercial and MIL aircraft as well as equipment for deep space applications (high altitude requirements). These miniature hermetic sealed switches can be found in a variety of other applications including MIL land vehicles, marine environments, and other harsh industrial environments. The switches are available as a MIL-PRF-8805 qualified switch. Select HM switches are available with UL 508 certification for industrial or surface transportation applications. The Honeywell  MICRO SWITCH™ HM hermetic sealed switch design incorporates the glass-to-metal and metal-to-metal sealing with more than 50 years of use in multiple applications.

The Honeywell  hermetically sealed HM basic switches are ideal where a symbol 5 seal is required for stringent applications including a wide range of temperatures from -184 °C to 260 °C [-300 °F to 500 °F]. Designed with a stainless steel housing and hermetic seal construction, the HM switches are suitable for applications where dust, water, other particulate contaminants, and corrosive gases are present.

The Honeywell  HM basic switch provides versatility with bifurcated gold contacts for controlling low energy loads (mA and mV) reliably or silver contacts for switching power duty loads at 30 vdc or 115 Vac, 400 Hz. Electrical connectivity to the switch is achieved with individual wire leads or "through hole" solder posts adding to the versatility of the HM switch.

What makes our switches better?

• Precisely detects position of mechanical components within a particular system that is susceptible to physical and atmospheric (corrosive gas, oxygen, etc.) elements

• Consistent and precise performance in a hermetic-sealed package for adverse, inclement environments

• Functionality over a large temperature range - can tolerate very low and high temperatures

• Honeywell can create value-added HM assemblies for unique, custom applications beyond a simple HM switch• HM switches are available with MIL-PRF-8805 qualifications or UL 508 certifications

Features and Benefits

MIL-QUALIFIED

MICRO SWITCH™ HM switches are hermetically sealed with versions that are MIL-PRF-8805 qualified for demanding MIL or commercial applications on aircraft, spacecraft, or ground vehicles.

UL CERTIFIED

Select HM catalog listings are UL 508 certified for industrial and surface transportation applications.

TINY

Miniature package size requires minimal space on equipment.Hermetically sealed with wide temperature rangeSEALED TIGHT

HM Series' Symbol 5 hermetic-sealed enclosures are suitable for applications at sea level, high altitude, or deep space.

LOW VOLTAGE AND POWER DUTY CAPABILITY

MICRO SWITCH™ HM products are available with silver contacts for control of power duty circuits or gold contact surfaces for control of logic level circuits.

LEVERS FURTHER EXPAND FUNCTIONALITY

Auxiliary actuators expand the versatility of the switch for additional applications.

WELL SUITED FOR LOW AND HIGH TEMPERATURES

For endurance in harsh temperature environments, wide temperature range is available from -184 °C to 260 °C [-300 °F to 500 °F]. Operate point stability is maintained over the specified temperature range.

MIL AIRCRAFT AND HELICOPTERS

• Detects landing gear bay doors in closed and locked position• Senses engine fuel valve position

• Identifies when external hatches and doors are in closed and/or locked position

COMMERCIAL AIRCRAFT AND HELICOPTERS

• Detects landing gear bay doors in closed and locked position

• Senses engine fuel valve position

• Identifies when external hatches and doors are in closed and/or locked position

• Miscellaneous applications inside commercial aircraft cabin, including waste management valve position, refreshment (liquids and food) stowed and locked position, HVAC, and oxygen valve position

AVIATION GROUND SUPPORT EQUIPMENT

• Monitor position of valves, doors or panels, for open, closed, or locked position

SPACECRAFT

• Identifies when external hatches and doors are in closed and/or locked position

• Senses engine fuel valve position

• Select sensing applications inside spacecraft cabin

POWER GENERATION, OIL AND GAS

• Internal switch element in pressure switches, temperature switches, and/or flow switches

ELECTROMECHANICAL SWITCHES

Definitions below explain the meaning of operating characteristics. Characteristics shown in tables were chosen as most significant. They are taken at normal room temperature and humidity. These may vary as temperature and humidity conditions differ. Sketches show how characteristics are measured for in-line plunger actuation. Linear dimensions for in-line actuation are from top of plunger to a reference line, usually the center of the mounting holes.

Differential Travel (D.T.) - Plunger or actuator travel from point where contacts ''snap-over'' to point where they ''snap back.''

Free Position (F.P.) - Position of switch plunger or actuator when no external force is applied (other than gravity).

Full Overtravel Force - Force required to attain full overtravel of actuator

Operating Position (O.P.) - Position of switch plunger or actuator at which point contacts snap from normal to operated position. Note that in the case of flexible or adjustable actuators, the operating position is measured from the end of the lever or its maximum length. Location of operating position measurement shown on mounting dimension drawings.

Operating Force (O.F.) - Amount of force applied to switch plunger or actuator to cause contact ''snap-over.'' Note in the case of adjustable actuators, the force is measured from the maximum length position of the lever.

Overtravel (O.T.) - Plunger or actuator travel safely available beyond operating position.

Pretravel (P.T.) - Distance or angle traveled in moving plunger or actuator from free position to operating position.

Release Force (R.F.) - Amount of force still applied to switch plunger or actuator at moment contacts snap from operated position to unoperated position.

Total Travel (T.T.) - Distance from actuator free position to overtravel limit position.MICRO SWITCH™ HM SERIES PRODUCT SPECIFICATIONS AND LISTINGSO.F. •  Operating forceR.F. •  Release forceP.T.  •  PretravelO.T. •  OvertravelD.T. •  Differential travelO.P. •  Operating position

* Recommended to minimize force on housing of HM switch and any resulting damage to switch housing.
Note: Torque on #2 mounting screws must not exceed 0,17 Nm [1.5 in-lb]. The force spreading plate, 19PA137-HM, will allow up to 0,28 Nm [2.5 in-lb] of mounting torque.
Contact us for additional listings

BNSENS (Nanjing) Sensor Technology Co., Ltd. is located in Nanjing, China. It is a high-tech enterprise specializing in the development, manufacturing and trade of sensor products. The company has brought together a group of outstanding technical experts in various fields such as automation, electronics, machinery and computers. All employees of the company have college degrees or above. It adopts the world-class management and operation model and 6 sigma quality system. At present, the company's main products are pressure, liquid level, flow, current, switches, etc. The company's users are all over the country, and some products have been exported to Japan, South Korea and Southeast Asia.

Since its inception, the company has been based on the technical accumulation and management standards of American sensor giants. It is composed of senior engineers and managers who have served in multinational companies for many years, and has rapidly developed various pressure sensors, transmitters, liquid level, flow meters, pressure switches, digital meters, current sensors, proximity switches and other products. After years of unremitting efforts, it has become one of the leading suppliers in the domestic automation industry. Our pressure transmitters can achieve an accuracy of more than 3/10, 000. The products have been widely used in oil, natural gas, electricity, chemical industry, metallurgy, building materials, food, light industry, environmental protection, aerospace, tap water, municipal and other industries.

It is a sensor science and technology innovation company that masters the core technology of MEMS chips. The company has a research and development center in Minnesota, USA. The leader is Dr. Pan Hanjin, a famous scientist in the sensor industry. Dr. Pan Hanjin has been deeply involved in the sensor industry for more than 20 years and is an expert in the sensor industry.

The company has a number of ASIC chips independently developed, which are widely used in industrial, automotive, home appliance and other markets.

BNSENS (Nanjing) Sensing Technology Co., Ltd. is a strategic partner of Honeywell in China. The two parties proposed a plan of East serving East and jointly developed several sensors specifically for the Chinese market. These sensors will be widely used in intelligent manufacturing, Internet of Things, artificial intelligence, and smart home fields. These sensors include: Magnetic sensors, temperature sensors, humidity sensors, force sensors, fire water pressure sensors, equipment vibration sensors, human body status monitoring sensors, motion sensors, etc.

History of BNSENS Company:

BNSENS is a company focusing on sensors, instruments, and electronic components. We are a young company, founded in 1999, just 25 years old, and we are still growing.

1999: The company's first pressure sensor was launched, mainly for the petroleum and petrochemical industries.

2002: The company expanded its product line and launched temperature sensors

2005: Started producing high-precision pressure sensors for the test and measurement market

2006: Became an official authorized agent of Honeywell

2009: Introduced the Six Sigma management system, and the product qualification rate was greatly improved

2010: Became a supplier of Emerson

2011: We started selling SICK sensors

2014: Introduced the sensor production line from Germany, developed more industrial control sensors, and cooperated with TSMC

2015: Cooperated with Siemens in Vietnam

2017: The factory moved to Nanjing High-tech Zone

2019: Became a national high-tech enterprise in China

2023: We started selling products from Infineon and Rohm

BNSENS, The Future Starts Here.