VLF Designs specialize in the manufacture of complete high performance crystal stabilized analog telemetry systems for short period seismic monitoring. We can provide individual components or complete turn-key systems. VLF also supplies custom transient suppression equipment. We design solar charge regulators and battery management systems to provide clean reliable power for both analog and digital seismic monitoring systems. VLF is willing to customize any of our designs to your specifications or design new hardware to meet your requirements. Since 2001 we have partnered with Eentec to provide their line of rotational, broadband and acceleration sensors. We integrate their sensors and others into custom packages for borehole applications. VLF serves both domestic and international clients