Flow meter model 850 + accessories

The flow meter type 850 works according to the approved calorimetric measuring principle: In... more

The flow meter type 850 works according to the approved calorimetric measuring principle: In this process a heated sensor is cooled down by the gas circulating around it. The flowdependent cooling-down is used as a measuring effect while the degree of cooling-down is directly depending on the passing air resp. gas mass. Therefore, an additional pressure and temperature compensation is not necessary. Unlike conventional bridge circuits, the newly developed evaluation electronics system captures all measurement values digitally. This facilitates very precise and fast measurements. All models have a Modbus output as standard thanks to the new evaluation electronics system. This means all measurements can be transmitted via Modbus.

Due to its compact design it is possible to monitor all compressed air systems from the compressor to the smallest compressed air tool (1/4 inch up to 2 inch) with the flow meter type 840. This device is designed for compressed air and nitrogen. For other gases like oxygen, carbon dioxide, argon, nitrous oxide more types are available on request.

The installation can be done easily and quickly. A special advantage is the removable measuring device: The measuring device can be demounted quickly and easily for calibration or cleaning purposes without removing the complete measuring section. A sealing cap ensures continued use of the line at cleaning time. A bypass line is not required.

Application range

  • Compressed air balancing, compressed air consumption measurement
  • Leakage air / leak rate determination
  • Mobile compressed air measurement in front of single machines/plants
  • Flow measurement of process gases like e. g. nitrogen, CO2, oxygen, argon, nitrous oxide
  • Flow measurement at nitrogen generators
Connection thread measuring section* R1/4, R1/2, R3/4, R 1, R 1 1/4, R 1 1/2, R 2
Parameters  
- with compressed air m³/h, l/min (DIN1945, ISO 1217 - 1000mbar, 20°C)
- with gases Nm³/h, Nl/min (DIN1343 - 1013mbar, 0°C)
Adjustable via keypad m³/h, m³/min, l/min, l/s, ft/min, cfm, m/s, kg/h, kg/min
Measuring principle calorimetric measuring
Sensor 2x silicon chip
Measuring medium air, gases
  gas types upon request: argon, CO2, oxygen, nitrous oxide
Measuring range see table
Accuracy ±1,5% of measurement value, ±0,05% of end value
  upon request: special calibration via 5 point-ISO-calibration certificate
Compressed air counter up to 1.999.999.999m³, resettable to "zero" via keypad
Operating temperature -30 up to +80°C
Max. operating pressure p1 up to 16 bar (as option up to 40 bar)
Analogue output 4 - 20mA for m³/h or l/min
Pulse output 1 pulse per m³ resp. per liter, galvanically separated
  Pulse value can be set on the display
Digital output RS 485 port, Modbus RTU
Power supply 24V DC smoothed ±15%
Burden <500 Ohm
Material - housing: polycarbonate
  - measuring section: stainless steel 1.4301 (16bar) / stainless steel 1.4404 (40bar)
Waste electrical and electronic equipment WEEE reg. No. DE51604370
* DINEN10226 (ISO7-1)
Dimensions [mm]
Connection Outer pipe dia. Inner pipe dia. Measuring range L L1 H H1 A
R1/4 DN8 Ø13,7 Ø8,9 194 137 174,7 165,7 15
R1/2 DN15 Ø21,3 Ø16,1 300 210 176,4 165,7 20
R3/4 DN20 Ø26,9 Ø21,7 475 275 179,2 165,7 20
R1 DN25 Ø33,7 Ø27,3 475 275 182,6 165,7 25
R1 1/4 DN32 Ø42,4 Ø36,0 475 275 186,9 165,7 25
R1 1/2 DN40 Ø48,3 Ø41,9 475* 275 189,9 165,7 25
R2 DN50 Ø60,3 Ø53,1 475* 275 195,9 165,7 30
*Attention: Shortened inlet section! Please observe the recommended minimum inlet section (length = 10 x inner diameter) on site.
Preview Size (in px) Download
Preview: Flow meter model 850 Download image
Preview: Flow meter model 850 + accessories Download image

16 products found!

850.120 EAN: 4030875159769

Flow meter for compressed air and gases, R 1/4, max. 16 bar, 24 V DC, stainless steel 1.4301

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Delivery time appr. 1–3 workdays

850.121 EAN: 4030875159776

Flow meter for compressed air and gases, R 1/2, max.16 bar, 24 V DC, stainless steel 1.4301

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Delivery time appr. 1–3 workdays

850.122 EAN: 4030875159783

Flow meter for compressed air and gases, R 3/4, max.16 bar, 24 V DC, stainless steel 1.4301

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Delivery time appr. 1–3 workdays

850.123 EAN: 4030875159790

Flow meter for compressed air and gases, R 1, max.16 bar, 24 V DC, stainless steel 1.4301

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Delivery time appr. 1–3 workdays

850.126 EAN: 4030875159806

Flow meter for compressed air and gases, R 1 1/4, max.16 bar, 24 V DC, stainless steel 1.4301

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Delivery time appr. 1–3 workdays

850.128 EAN: 4030875159813

Flow meter for compressed air and gases, R 1 1/2, max.16 bar, 24 V DC, stainless steel 1.4301

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Delivery time appr. 1–3 workdays

850.129 EAN: 4030875159820

Flow meter for compressed air and gases, R 2, max.16 bar, 24 V DC, stainless steel 1.4301

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Delivery time appr. 1–3 workdays

850.420 EAN: 4030875159837

Flow meter for compressed air and gases, R 1/4, max.40 bar, 24 V DC, stainless steel 1.4404

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Delivery time appr. 1–3 workdays

850.421 EAN: 4030875159844

Flow meter for compressed air and gases, R 1/2, max.40 bar, 24 V DC, stainless steel 1.4404

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Delivery time appr. 1–3 workdays

850.422 EAN: 4030875159851

Flow meter for compressed air and gases, R 3/4, max.40 bar, 24 V DC, stainless steel 1.4404

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Delivery time appr. 1–3 workdays

850.423 EAN: 4030875159868

Flow meter for compressed air and gases, R 1, max.40 bar, 24 V DC, stainless steel 1.4404

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Delivery time appr. 1–3 workdays

850.426 EAN: 4030875159875

Flow meter for compressed air and gases, R 1 1/4, max.40 bar, 24 V DC, stainless steel 1.4404

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Delivery time appr. 1–3 workdays

850.428 EAN: 4030875159882

Flow meter for compressed air and gases, R 1 1/2, max.40 bar, 24 V DC, stainless steel 1.4404

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Delivery time appr. 1–3 workdays

850.429 EAN: 4030875159899

Flow meter for compressed air and gases, R 2, max.40 bar, 24 V DC, stainless steel 1.4404

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Delivery time appr. 1–3 workdays

840-210 EAN: 4030875151589

Accessories:

Closing cap for measuring section, aluminum

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840-212 EAN: 4030875151596

Accessories:

Mains unit 100-240 VAC / 24 VDC, 0,35 A, cable length 2 m

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Delivery time appr. 1–3 workdays

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