HT-1890 Portable Digital manometer, pressure manometer
The HT-1890 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