• Continuous internal self-checking operation

• Diverse-redundant microcontroller-based photoelectric touch buttons

• Ergonomically designed to eliminate hand, wrist, and arm stresses associated with

repeated switch operation; requires no physical pressure to operate

• High excess gain cuts through heavy contamination

• Immune to ambient light, EMI, and RFI interference

• LED power, output, and fault indicators

• Pre-installed field covers protect the device and prevent inadvertent activation