Description

MICRO SWITCH™ HM Series hermetically sealed basic switches contain contacts in a sealed chamber. A gas-tight seal is maintained while transmitting force and motion to the switch mechanism through a metal diaphragm. HM Series Hermetically Sealed Switches are not generally recommended for 115 Vac, 60 Hz. If you have a 60 Hz application in the mA range, or applications that require the switch to function electrically during exposure to sub-freezing temperatures, contact us for special design variations that are available.

Features

• Hermetically sealed per MIL-PRF-8805, design symbol 5
• Broad temperature tolerance range of -65 C to 121 C [-85 F to 250 F]
• High temperature construction for use in a range of -65 C to 260 C [-85 F to 500 F]
• MIL-PRF-8805 qualified listing
• Not sensitive to changes in altitude or pressure
• Compact size, light weight
• Gold contacts available
• Choice of actuation and termination

Typical Applications

• Adverse gas or vapor environments
• Oil drilling installations
• Marine environments
• Submarines and stationary undersea equipment
• Refrigeration units
• Aircraft and spacecraft
• Earth moving machinery
• Desert vehicles
• Cement mills