The Trillium Horizon 120 is a highly sensitive, very broadband seismometer engineered for both direct burial and vault installations. It delivers precise measurements of ground motion with a bandwidth of 120 seconds to 150 Hz and is designed to operate reliably in a wide range of environmental conditions. Its symmetric triaxial configuration ensures consistent performance across all axes, while its low sensitivity to tilt and temperature reduces the need for maintenance or recalibration after deployment.

Strong-motion sensors are accelerometers, and are designed to measure the large amplitude, high-frequency seismic waves typical of large local earthquakes. These seismic waves result in the strong ground motion we feel during a large earthquake. Strong ground motion is often to blame for the structural damage that occurs during an earthquake. The data seismologists record with strong motion sensors is used to improve the design of earthquake resistant buildings and to understand earthquake-induced geologic hazards like liquefaction and landslides. The range of motions of interest for strong-motion applications includes accelerations from 0.001 to 2 g and frequencies from 0 to 100 Hz or more.

Q330's are typically used for broadband standalone and telemetered real-time data recording. They have an external storage device (either hard drive or USB flash drive) and lend themselves for a variety of telemetered modes.