The EM152 measures differential, positive or negative pressure. Units can be selected from any one of 11 options including; inH2O, psi, bar, mBar, kPa, InHg, mmHg, ozin, FtH2O, cmH2O and kgcm. Features pressure zero, hold and record. A simple hose barb allows for quick tubing connections. And is backed by a 1-Year limited warranty. UEi Test Instruments has over 50 years experience designing and manufacturing a broad range of award-winning, industry-leading Test and Measurement Tools. UEi Test Instruments are sold throughout North America and Canada and professionals recognize the UEi brand for quality and innovative features designed to solve real-world problems. UEi's NIST-certification laboratory is compliant with ISO17025. UEi backs its products with dedicated technical support, service and repair teams.