The Model DPST-3500M Digital Pitot Static is a precision test set with dual channel pressure controller, designed to provide regulated total (PT) pressure and static (PS) pressure outputs to simulate altitude, airspeed, and vertical speed parameters. This unit is certified to perform Pitot Static FAR 91.411 and FAR 43 Appendix E certifications. In addition, this unit can be used in a laboratory environment to calibrate altimeters and airspeeds in maintenance shops or harsh hangar environments. For more information call 214-217-7600 or visit www.dfwinstruments.com.