Field Instruments

General

The differential pressure sensor acquires differential, over and under pressure of air and non-aggressive gases, if a high degree of measuring accuracy and quality is required.It is also suited for measuring volume flow via differential pressure since the output signal can be set to extracting the root.

Fields of application

● Measuring the slightest differential pressures in ventilation and air conditioning ducts

● Check air flows

● Monitor filters and control fans

● Pressure monitoring in labs, production, and clean rooms

● For acquiring variable air flow in VAV plants on the supply and extract air side

Features

• High degree of measuring accuracy
• Adjustable characteristic curve (pressure-linear or extracting-the-root)
• Operating voltage
  • QBM3020-..: AC 24 V / DC 13,5...33 V
  • QBM3120-..: DC 8...33 V
• Output signal
  • QBM3020-..: DC 0...10 V
  • QBM3120-..: 4…20 mA
• Zero-point adjustment
• Simple and fast mounting thanks to integrated fixing angle bar in the housing
• Maintenance free thanks to excellent long-term response
• Calibrated and temperature-compensated measuring signal
• Supplied with PVC tubing
• Very short reaction time
• Display* Displays the present differential pressure.

Depending on type

Specifications

• Make: Siemens
• Model: QBM3120-25
• Analog output, signal: DC 4...20 mA
• Sensing element: Pressure diaphragm
• Response Time : <20 ms
• Pressure connection: Connecting branch∅ 6.2 mm dia.
• Connection, electrical: Screw terminals
• Medium temperature: 0…70 °C
• Measuring range, pressure: 0…2500 Pa
• Degree of protection: IP54
• Dimensions (W x H x D): 101 x 86 x 49 mm

Fieldinstruments.lk
50/3, Angampitiya Rd, Ethul Kotte, Sri Lanka. 10100.
Phone: +94718555888 Email: info@fieldinstruments.lk