(TL-101) Digital manometer measures gauge/differential pressure from -55H2O to +55H2O(2 psi) It features 11 selectable units of measure: in H2O, pis, bar,mbar,Kpa,inHg,mmHg,ozin2,ftH2O,kgcm, additional features include data hold and auto power off disabled,careful use of this meter will provide years of reliable service. Features: 1.Max / minimum / average, and with a relative time 2.Large LCD backlit dual display 3.Zeroing, offset, and data compensation 4.Low battery display and automatic shutdown 5.Data Hold and Error code 6.9Vbattery 7.Client can calibrate the meter by oneself Specifications: 1.Pressure Range:+/-5psi(TL-101) 2.Accuracy:+0.3% FSO (at 25oC) 3.Repeatability: +0.2% (Max+0.5%FSO) 4.Linearity/Hysteresis:+0.29% FSO 5.Response Time:0.5Seconds Typical 6.Over Range Indicator:Hi 7.Under Range Indicator:Lo 8.Operating Conditions:0 to 50oC(32 to 122oF) 9.Storage Conditions:-10 to 60oC (14 to 140oF) 10.11 Selectable units of Measure 11.Max / minimum / average, and with a relative time 12.Large LCD backlit dual display 13.Zeroing, offset, and data compensation 14.Low battery display and automatic shutdown 15.Data Hold and Error code 16.9Vbattery 17.Client can calibrate the meter by oneself OEM is acceptable CE and ROHS are approved Lowest shipping cost could be provided 53X31X36CM/carton 37pcs/carton 10KGS/carton