The palm-sized Sauermann Si-PM3 digital differential pressure manometer easily measures pressure.

Technical Data sheet User manual Simplified manual
Measuring range: -150 to +150 hPa (-60 to 60 inH2O)
Air velocity and airflow with Pitot tube (optional)
Backlit LCD screen
Magnetic backing for easy fixing & carrying bag

Measure details

  • Units
    inH₂O, Pa, mbar, hPa, mmH₂O, psi
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Measuring ranges

  • Pressure
    -150.00 hPa ... 150.00 hPa
  • Airflow
    0.00 m³/h ... 9999.00 m³/h
  • Air velocity
    2.00 m/s ... 80.00 m/s
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Technical details

  • Parameters
    Air velocity
    Airflow
    Differential pressure
  • Displays
    2-line display
  • IP Protection
    IP 40
  • Battery life
    170 hours
  • Standards
    RoHS II 2011/65/EU (EU)2015/863
    UKCA
    2012/19/EU WEEE
    2014/53/EU RED
  • Bluetooth
    1
  • Power supply
    3 alkaline batteries LR03 AAA 1.5 V
  • Protective cover
    No
  • Interchangeable module
    No
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Instrument Dimensions

  • Length
    2 3/4 inches
    70 mm
  • Width
    1 5/16 inches
    33 mm
  • Height
    5 9/16 inches
    141 mm
  • Weight
    7 pounds
    200 g
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Operating temperature

  • Min
    0.00 °C
  • Max
    50.00 °C
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Storage temperature

  • Min
    -20.00 °C
  • Max
    70.00 °C
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2 clear tubes Ø4x6 mm, 1 m (39.37’’) length
1 Certificate of conformity
1 Quick Start Guide
3 alkaline batteries LR03 AAA 1.5 V
1 Carrying bag
Si-HVACR Measurement Mobile App
Si-HVACR Measurement Mobile App