The Crouse-Hinds series MTL AirGuard line of surge protection devices provides radio frequency protection and includes both gas discharge tube (GDT) and quarterwave stub technologies (QWS). In come cases, the product may use both technologies for added performance to meet customer specifications. The range includes all types of connectors and gender configurations.

The Airguard portfolio consists of the following families:

FGT range – Wideband surge protection for multipoint (MMDS/LMDS) applications
GT range – Wideband surge protection for radio telemetry applications
RGT range – Wideband surge protection with replaceable gas tube element
NQWS range – Narrowband QuarterWave Tubeless Stub surge protection