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Optical Flow Sensor FA-2 bi

Optical Flow Sensor FA-2 bi

Part No.: 02E2000

Product features

Optical flow alarm sensor for bistable and monostable use
Bistable: sensor detects if sufficient or low flow is present
Monostable: sensor detects set flow value
For float-type flow meters with measuring tubes out of translucent material
Measuring tube diameter: 13 to 27 mm
Mounting with pressure screw
3 m connecting cable

Product information & downloads

Barometric adjustment of the operating altitude of O₂ analyzers without pressure compensation

Enter the planned operating altitude in the field. Set the analyzer to the calculated O2 vol% value at 1013 mbar (altitude = 0 m) in air to measure at the planned operating altitude without barometric error.

planned operating altitude above sea level in [m]

Result: 22,9378 [vol%] need to be set to measure at the planned altitude without barometric error.*

*Air with standard pressure 1013 mbar = 20.93 vol% O₂

Pressure drop and delay time

Enter your values in fields 1 to 3.

1 Hose/tube diameter in [mm]

2 Tube length in [m]

3 Flow rate in [Nl/h] Standard flow rate Nl/h
Volume flow under following
Defined conditions:

Temperature = 273.15 K (0 °C)
Pressure = 1,01325016 bar (760 mm HG)
Air density = 1,294 kg/m³ (dry air)

Result: 3,39 Delay time approx. in [s]*

* Single change of gas, for 90 % response time approx. 3 changes of sample volume are required.

Calculation of the pressureless 100 % H₂O saturation

Enter the required H₂O dew point (°C).
The calculation only provides sufficiently accurate values in the temperature range between -20 °C and +90 °C.

H₂O dew point [°C]

H₂O volume proportion [vol%]

H₂O weight proportion per standard cubic meter gas [in g/Nm³] Standard flow rate Nl/h
Volume flow under following
Defined conditions:

Temperature = 273.15 K (0 °C)
Pressure = 1,01325016 bar (760 mm HG)
Air density = 1,294 kg/m³ (dry air)

Pressure units

Enter a value to be converted in the respective field. All other fields will show the converted value immediately.

[at] technical atmosphere

[atm] physical atmosphere

[bar] bar

[kPa] = kN/m²] kilopascal

[psi = lb/in²] psi

[ft H₂O] foot of water (4 °C)

[inch H₂O] inch of water (4 °C)

[inch Hg] inch of mercury (0 °C)

[Torr = mm Hg] mm of mercury (0 °C)

Temperature units

Enter a value to be converted in the respective field. All other fields will show the converted value immediately.

[°C] °Celsius

[°F] °Fahrenheit

Length units

Enter a value to be converted in the respective field. All other fields will show the converted value immediately.

[mm] millimeter

[cm] centimeter

[m] meter

[km] kilometer

[mi] mile

[ft] foot

[in] inch

Area units

Enter a value to be converted in the respective field. All other fields will show the converted value immediately.

[cm²] square centimeter

[m²] square meter

[km²] square kilometer

[mi²] square mile

[ft²] square foot

[in²] square inch

Volume units

Enter a value to be converted in the respective field. All other fields will show the converted value immediately.

[cm³] cubic centimeter

[dm³] cubic decimeter

[m³] cubic meter

[in³] cubic inch

[ft³] cubic foot

[gal] US gallon

Weight units

Enter a value to be converted in the respective field. All other fields will show the converted value immediately.

[g] gram

[kg] kilogram

[oz] ounce

[lb] pound

Energy units

Enter a value to be converted in the respective field. All other fields will show the converted value immediately.

[J] joule = watt-second [Ws]

[kJ] kilojoule

[kWh] kilowatt-hour

[kcal_th] thermochemical kilocalorie

[Btu] British thermal unit

Flow rate

Enter a value to be converted in the respective field. All other fields will show the converted value immediately.

[m³/s] cubic meter per second

[l/s] liter per second

[l/min] liter per minute

[l/h] liter per hour

[m³/h] cubic meter per hour

[ft³/min] cubic foot per minute

Flow velocity

Enter a value to be converted in the respective field. All other fields will show the converted value immediately.

[m/s] meter per second

[km/h] kilometer per hour

[ft/s] foot per second

[mile/h] mile per hour

Performance units

Enter a value to be converted in the respective field. All other fields will show the converted value immediately.

[kJ/h] kilojoule per hour

[W] watt

Overview

For non-heated flow meters, clamping range from 13 to 27 mm
Applications
The patented forked light-barrier FA-... bi is used in gas and water analysis for flow monitoring in flow meters with measuring tubes made of transparent material, e.g. Duran glass. Thanks to optical scanning, very low flow quantities can be detected by flow meters with non-metallic or very small (1 mm) floating balls.
Description
Photoelectric bistable clamp‑on flow sensor type FA2 bi, clamping range: 13 to 27 mm, 3 m connecting cable