Highest quality reed switches feature contacts hermetically sealed in a protective atmosphere. Protected contacts mean reliable operation in wet, oily, dirty — even explosive — environments. Glass capsule size ranges from a compact 2" glass length down to under 1/4" long! Ideal for use in proximity switches, flow meters, counting devices, limit switches, reed relays and precision instrumentation. Actuate Time: 3 millisecond, or less on 2" capsules; 1 millisecond, or less on capsules under 1" in length. Typical Life Expectancy: 50 million operations. Contacts: Form A (SPST-N.O.) or Form C (SPDT), may be actuated by permanent magnet or coil. Magnets sold below. Coils available on request. Average Shipping Weight: 1 Oz. each.