Blue-White Industries” Sonic-Pro Series hybrid ultrasonic flowmeters are individually calibrated with water only and include a calibration certification graph. The Class A calibration standard test equipment is certified to provide accuracy of +/-0.43 percent. Blue-White calibration standards comply with MIL-STD 45662A and ANSI/NCSL Z540-1 and are traceable to the National Institute of Standards and Technology. The flowmeters have the ability to measure fluid flow using either Doppler or transit-time ultrasonic methods. Additional features include: noninvasive clamp-on transducers; custom metric algorithms and DSP technology for reliable, accurate measurement; easy reading display (320×240 pixels with backlit LCD); and NEMA 4X (IP 66) washdown enclosure.