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ROHS Siemens Building Automation Differential Pressure Switch QBM81-5

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ROHS Siemens Building Automation Differential Pressure Switch QBM81-5

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Brand Name :SIEMENS
Model Number :QBM81-5
Certification :ROHS
Place of Origin :China
MOQ :1pc
Price :negotiable
Payment Terms :T/T
Supply Ability :100pcs per month
Delivery Time :on request
Packaging Details :standard carton packing
Digital outputs :CO: 1; Potential-free
Permissible operating pressure :7.5 kPa
Ambient temperature, operation :-20…85 °C
Mounting position :Diaphragm vertical, pressure connection pointing downward
Digital output, switching voltage :AC 24…250 V; 24 V
Digital output, switching current :0.01…5 (3)A
Measuring range, pressure :50…500 Pa
Dimensions (ø x L) :81 x 90 mm
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Siemens Differential Pressure Switch QBM81-5

  • For ventilation and air conditioning plants
  • To monitor air filters, air flow, fan belts
  • To monitor pressure in clean rooms, kitchens etc.
  • Easy to mount
  • >1 mio switching cycles
  • Highly precise setting
  • Long-term stability

Mechanical design

The differential pressure switch QBM81-... consists of:

  • Housing and cover
  • Diaphragm
  • 1 sheet-steel mounting bracket

Accessory duct probe connection kit (FK-PZ3):

  • 2 duct adaptors
  • 4 fixing screws
  • 2 m tubing, 5/8 mm dia.

Type summary

Type Pressure range
QBM81-3 0,2…3 mbar 20…300 Pa 0.08…1.2 inH2O
QBM81-5 0,5…5 mbar 50...500 Pa 0.2…2 inH2O
QBM81-10 1…10 mbar 100…1000 Pa 0.4…4 inH2O
QBM81-20 5…20 mbar 500…2000 Pa 2…8 inH2O
QBM81-50 10…50 mbar 1000…5000 Pa 4…20 inH2O

ROHS Siemens Building Automation Differential Pressure Switch QBM81-5

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