Sierra Instruments” Smart-Trak 50 Series mass flow controller shares the same advanced core sensor technology as the company”s Smart-Trak 100 model, but at nearly half the price with expedited off-the-shelf delivery at no extra charge. This performance/price advantage was made possible by reducing the number of mass flow controller parts by almost 50 percent, automating calibration around slightly reduced accuracy, and leveraging R&D costs against an already developed sensor, valve and LFE technology. The mass flow controller delivers accuracy of +/-1.5 percent full scale, repeatability of +/-0.25 percent full scale, 300 millisecond response time and 0-50 slpm (nlpm) range. It comes with 316L stainless steel wetted materials, field zero & span adjust, analog outputs, as well as RS-232 and RS-485 with optional local display and two DB9 connectors located on either side of the enclosure for convenient wiring.