MIL-QUALIFIED

MICRO SWITCH™ HM switches are hermetically sealed with versions that are MIL-PRF-8805 qualified for demanding military 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.

SEALED 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.

Potential Applications

MILITARY 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

MICRO SWITCH™ Hermetic Sealed Basic Switches

Table 1. Specifications

Table 2. Electrical Ratings

Table 3. UL 508 Electrical Ratings

HM Series

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 ‘‘snapback.’’

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™ Hermetic Sealed Basic Switches

MICRO SWITCH™ HM SERIES PRODUCT SPECIFICATIONS AND LISTINGS

Contact your Honeywell rep or distributor for additional listings

HM Series

JS SERIES LEVERS SPECIFICATIONS* (WHEN ASSEMBLED TO 16HM1-1)

* Stainless steel actuators, including roller and mounting hardware (when provided).

MICRO SWITCH™ Hermetic Sealed Basic Switches

PRODUCT AND ACTUATOR DIMENSIONS

Figure 1. MICRO SWITCH™ HM, Solder Terminal Figure 2. MICRO SWITCH™ HM, Wire Leads

HM Series

MICRO SWITCH™ Hermetic Sealed Basic Switches

ADDITIONAL INFORMATION