Page 2 - MICRO SWITCH Hermetic Sealed Basic Switches

MICRO SWITCH™ HM Series

Hermetic Sealed Basic Switches

Honeywell HM hermetic sealed miniature basic switches are designed for a variety of commercial and military 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 military 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 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 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 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 atmo-
spheric (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

HM Series: when you need a

switch with out-of-this-world
performance!

HIGH PERFORMANCE • DURABILITY
CONFIGURABLE • COMPACT

2 sensing.honeywell.com