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Isolate difficult pressure problems in natural gas and propane systems. Providing a differential measurement, the DDM55 accurately tests for leaks in low pressure gas systems and more.


  • Range ± 55" H2O
  • Dual Input
  • Resolution to 0.01" H2O
  • ⅛" ID Hoses, fitting and case included
  • Backlit LCD
  • Left port - negative pressure
  • Right port - positive pressure
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Display: Dual LCD
Accuracy: ± 0.3%FSO (25°C)
Repeatability: ± 0.2% (Max. ± 0.5% FSO)
Linearity/Hysteresis: ± 0.29% FSO
Pressure Range: ± 2 psi
Maximum Pressure: 10 psi
Response Time: 0.5 Seconds typical
Low battery Indicator: Yes
Over Range Indicator: Err.1
Under Range Indicator: Err.2
Operating Conditions: 32°F to 122°F (0°C to 50°C)
Storage Conditions: 14°F to 140°F (-10°C to 60°C)
Power Supply: 9V Battery (Included)
Leakage tests
Set delivery pressures
Regulator adjustments
Confirm pressure switch operation
SDS Product Sheets Cross Reference Information
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Manuals Application Sheets Software
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Replacement Part:EM-201
Part Description:Manometer
Manufacturer :UEI®

Replacement Part:MA-12835
Part Description:Manometer
Manufacturer :MA-Line®

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