This instrument will help you maintain and test many pieces of hospital equipment. It accurately measures pressure, gas flow rate, tidal volume, breath rate, inspiratory/expiratory ratio and other functions. The RT-200's micro-processor based design provides features and accuracy not available on other pneumatic calibrators. Features include peak-detect mode, digita l display, self-diagnostics, and others. On many parameters, accuracy is 1% or better.  Refurbished by Bemes, Inc and covered by a six month warranty.  Unit includes user manual and one year calibration certificate.