The 440G-T27123 part from Guard Master is a safety switch designed for use in hazardous locations. It is a two-pole, spring-return switch with a one, two, or three-way configuration and can be used to monitor if covers or other door/lid guards are in place. It includes a positive break contact, short-circuit and overload protection, and a manual reset feature. The switch is IP67-rated and can be used in applications ranging from 0°C to 55°C (32°F to 131°F).