HomeContact Us


roofAlertâ„¢ New 2 Wire Version Released!


Holville is proud to announce the launch of its new roofAlert™ 2 wire automatic roof monitoring system. The 2 wire system has been designed for ease of installation and use. Each automatic tell-tale incorporates a sealed 3-way, polarity-insensitive, insulation-displacement junction connector which can be very quickly installed using only a pair of pliers.  With no polarity restrictions, no stripping of wires, no circuit diagrams to be followed and no junction boxes to be wired, the system does not need to be installed by mine electricians.

Learn more about roofAlert™ Intrinsically Safe Mine Roof Monitoring Systems


No Very

Captcha Image