This 'Emergency Stop' switch is called a Chute Switch. It is installed on the tope of Silo to control the level of material (powder or solid items) in Silo.

Specification

CONTACT FORM: NOMAL CLOSED CONTACT CAPACITY 3A 125VAC PROTECTION :EXPLOSION-PROOF -WATER PROOF : IP 67 TYPE : TILT IN CLINATION TILT OF OPERATING : 25 DEGREE ±