Checking compressed air consumption
February 2013
Sensors & Transducers
The AF1 series flow sensors from Bosch Rexroth record the flow rate and compressed air consumption in a system, making an important contribution to optimising energy efficiency. The measurements help to detect leakages that are then reported to the controller via an alarm signal. This helps avoid energy losses and, when used as a standalone device, or in combination with AS series maintenance units, guarantees demand-based compressed air supply.
AF1 series flow sensors compare the actual values in a system with the set process values, allowing reliable control of flow rates. Larger leakages and wear leading to higher air consumption are detected early on. Unnecessary increases in consumption become transparent and consumption costs can be allocated to the relevant consumers.
The new AF1 sensor modules detect flow rates based on the difference in pressure between two internal measuring points. They have two PNP/NPN switch outputs each and one analog output. Users can set switching points for the two switch outputs on the basis of flow rate, air consumption or pressure, using simple and intuitive programming. The analog output provides the flow rate value.
All of the measurable variables can be selected and shown on a backlit large-format display, and operators can switch between the usual international units. Using the appropriate block assembly kits, the AF1 can be assembled as a standalone device or integrated and even retrofitted in AS series maintenance units of all sizes.
For more information contact Kevin Lombard, Tectra Automation, +27 (0)11 971 9400, kevin.lombard@tectra.co.za, www.tectra.co.za
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