The document discusses Dwyer Instruments' VBS vibration switch and VBT vibration transmitter. The VBS features an adjustable PNP solid state switch and time delay, while the VBT outputs vibration data as a 4-20 mA signal. Both products have NEMA 6 enclosures and operate within a 10-1000Hz frequency range suitable for monitoring motorized equipment. Guidelines are provided for setting alarm limits and using the VBS time delay to avoid nuisance alarms. Applications include fans, pumps, compressors and motors.