Dwyer releases a range of digital manometers. Series 475 Mark III Handheld Digital Manometer offers complete accuracy on air ranges from 1" w.c. to 150 psid and ±0.5% accuracy. Model 476A & 478A Digital Manometer promises single & dual pressure Measurement, electronic zeroing and ±1.5% Accuracy as its main features. The features of Series 477 Handheld Digital Manometer include selectable Pressure Units, ±0.5% Accuracy, certification from FM for serving in dangerous locations, Class 1, Div. 1, Group A, B, C, D, T4. Series 477A Handheld Digital Manometer promises precise air pressure measurement and ±0.1% F.S. accuracy. Series 490 Wet/Wet Handheld Digital Manometer used with liquid & gas pressure measurement with ±0.5% F.S. accuracy. Series HM28 Handheld Digital Manometer with high accuracy (0.2%, 0.1% or 0.05%) in Differential, Gage or Absolute. Series HM35 Precision Digital Pressure Manometer offers about 0.05% accuracy, graphical display and data logging capability.