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Differential Pressure Indicator

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Differential Pressure Instrument is targeted at precise differential pressure measurements in air conditioning and ventilation technology. It is excellent for use in measuring the pressure drop on filters and in checking fans and extractors. Differential Pressure instrument is also suitable for Pitot tube measurements in ventilation ducts or in process air (in the 5 to 100 m/s range).

Differential Pressure measuring instrument has an integrated temperature-compensated differential pressure sensor which measures with an accuracy of 0.1 % of f.v. Differential Pressure Instrument can attach up to 2 further optional probes to the measuring instrument.

following probes:

  • Differential pressure probes
  • Absolute pressure probes
  • Temperature probes (e.g. surface probes or immersion and penetration probes
  • Relative pressure probes
Specifications:

Model

Testo 521-2

Manufacturer

Testo

Measuring Range

Temp: -40 to +150 °C, Differential Pressure: 0 to 100 hPa

Display

LCD 7 segment display and point matrix 2x per second, in fast measurement 4x per second

Accuracy

Temp: ±0.2 °C (-10 to +50 °C)*,Differential Pressure: ±0.2 % of fsv

Resolution

Temp:0.1 °C, Differential Pressure:0.01 hPa

Storage Conditions

Temp:-20 to +70 °C

Power Supply

Battery/Rechargeable battery, Mains unit 12 V

Static Pressure

1000 hPa

Housing

ABS

Memory

100 kB; 25,000 measuring values

Battery Life

Continuous operation w/ internal pressure sensor: 30 h; With rech. battery: 10 h; With carbon battery: 18 h

Dimensions

219 x 68 x 50 mm

Weight

300 g

Warranty

2 years

Overload limit

50 hPa

Differential Pressure Indicator

Differential Pressure Indicator

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Differential Pressure Indicators are high accuracy instruments with integrated display & 4-20mA Analog Output. The differential pressure indicator has a 4 digit red L.E.D. Display of 0.5” Height with 0.1 mm.W.C. or 1 Pascals resolution. Industry standard 4-20mA Analog Output is available as standard output. Optional RS485 Modbus Output is also available for connecting to BMS/SCADA. Ranges available are from -10.0 to 10.0 mm. W.C./ 0.0 to 10.0 , 20.0, 50.0, 100.0, 25.0, 500.0, 1000, 2500, 5000 & 10,000 mm.W.C. The differential pressure indicator is provided with selectable units of mm.W.C. & Pascals selectable from front "UNIT" key. Any other standard metric unit can be accommodated including cm. W.C., In. W.C., In. Hg., mm. Hg. Integrated buzzer alarm for process violation is a standard feature with option of Enable/Disable Alarm with alarm delay time programmable. Customized measuring ranges can be provided as per requirement.
Applications:

  • Factory calibration laboratories
  • Calibration service companies and service industry
  • Research and development laboratories

Special Features:
  • Measuring ranges from 0 ... 25 mbar to 0 ... 700 bar (up to
  • 2 separate internal precision sensors possible)

Differential Pressure Indicators are extremely useful in pharmaceutical Laminar Air Flow Cabinets, clean rooms, Air Handling Units, Hepa Filters, Filters, Bag Filters, pharma machinery, Biosafety Cabinets, Laminar Air Flow Units, HVAC etc. Differential pressure indicators come in Aluminium LM-6 Body with Integrated High Speed Sensor with an accuracy of /-0.5%F.S. & 40 mm. depth & fits into industry standard Mounting Holes like the Analog Magnahelic Gauges. Customization is possible for quantity orders.

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