Series FA® Optical Bi-Stable Flow Alarm Sensors
●Description
■The patented M&C forked light barrier FA-1/2/3, bi consists of a compact aluminium body with a fixed, open prism and a pressure screw. This makes positioning of the sensor FA-1/2/3, bi on the flow meter’s measuring glass very easy; it is not necessary to disas- semble the measuring glass. Three basic ver- sions cover a measuring glass diameter range from 5 to 55 mm [≈ 0.2” to 2.2”].
■Within the sensor’s body, a mechanically pro- tected, high-intensity LED is mounted on the left side as a light source and two photo- transistors are mounted on the opposite side as receivers.
■The standard 3 meter long connection cable exits on the left side adjacent to the pressure screw. The LED emitters’ light beam is incident on the photo-transistors through the flow measuring glass. As soon as a floating ball breaks the light beam, one or both of the photo-transistors are blanked out.
■The necessary FA-1... electronic controllers analyze this status change accordingly. The bi-stable operation of the FA-1... electronic controllers ensures detection of the set flow rate in the event of measured values fall- ing below or exceeding this setpoint with the sensor in any position. The mono-stable operation of the FA-1... electronic controller indicates only whether the floating body is located in the light beam of the light barrier, above or below it.
■A special sensor head FA2-H is supplied for temperatures up to +180 °C [356 °F]. The sensor head contains a light guide on the right and left side via which the incident and emergent light is conducted by the transmitter/receiver located externally in a separate adapter in the “cold area“.
●Special Features
■Easy mounting without dismantling the measuring glass
■Also for very low flow quantities
■Even for non-metallic or very small floating balls
■Easy adjustment of any alarm setpoint
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Series FA® 、 FA-1 、 FA-2 、 FA-3 、 series FA 、 FM10 、 FA-1,bi 、 FA-2,bi 、 FA-3,bi 、 02E1000 、 02E2000 、 02E3000 |
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Datasheet |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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06.20 |
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212 KB |
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