The φ3mm（WS K3）fast respond glass bulbs has passed the UL certificate.

After the φ5mm(WS G5) standard respond glass bulbs passed the UL certificate in March 2010, another product, the φ3mm(WS K3) fast respond glass bulbs passed the UL certificate again in March 2017. UL File Number：EX15705.

This two products both comply with the UL standards of ANSI/UL 199、ANSI/UL 1626 and ANSI/UL 1767. The WS series glass bulbs use mature manufacturing technology and high-quality imported raw materials, and has good stability and outstanding performance. When the fire happens, with the increase of surrounding environment temperature, the sensitive original(the bulb) will expands after be heated and bursts rapidly to starts the sprinkler system in a standard time , thus to control fire in the early stage effectively.

As our main marketing product at abroad, the WS series glass bulbs are high cost-effective ,we are warmly welcome consultation and order from customers at home and abroad!

Product information of WS K3:click here.