HSI Spot On Leverless Limit-Switches are designed to handle the most extreme operating environments. The four different Spot On models can sense farther, faster and last longer than the competition.
*SPOT ON WIRE COLOR DESIGNATIONS:
Black Wire = Common / Red Wire = Normally Closed / Blue Wire = Normally Open / Green Wire = Ground (steel housing only)
From 'Making Sense' Blog
Secure Hazardous Locations with HSI Sensor Products
A significant proportion of industrial equipment will be deployed in hazardous areas, or possibly applications that require a functional safety assessment. Hazardous areas include locations where there is the risk of exposure to flammable or even explosive substances. Some of the most common applications for hazardous duty sensors are in the oil and gas industry. … Continued