Pressure monitoring for safety in buildings, air conditioning and clean-room technology of Beck GmbH Druckkontrolltechnik

Wherever gases are being conveyed under low pressure, differential pressure sensors can be used to derive some conclusions on the condition of the system. They find out, for example, whether butterfly valves are open or closed, filters are tight or fans are defective. In this connection, pressure variations are reliable indications of any changes in parameters. Thus, the most significant operating data will be permanently available in fields such as building automation, air conditioning and clean-room technology. To fit the various designs of such systems and to meet their requirements a new differential pressure sensor now offers eight different measuring ranges that can be selected. This will always allow you to choose your suitable measuring range without taking any expensive logistic and storekeeping efforts. Being capable of covering all measuring points within a system by one and the same device will practically make your work a lot easier. This is what a type differential pressure transmitter having a wide, adjustable measuring range is ideal for. Even after subsequent modifications such as replacing a filter, you can quickly select the proper measuring range without any cumbersome sensor replacement. That is why the new sensor from Beck Druckkontrolltechnik even offers you eight different pressure ranges you can choose from with the aid of a rotary selector switch. To guarantee clear, linear response for each range the designers allowed the 984Q sensor to have automatic zero-point calibration. This is to reliably compensate any drifting as caused by ageing, temperature or by system-inherent influences. This new piezo-resistive sensor can measure differential pressures from +/- 0.5 to +/- 5.0 mbar within four different ranges. Another four measuring ranges from 0 to 10 mbar are also available for choice. The three-wire output can be configured by means of a jumper to obtain a signal of 0...10 V or of 4...20 mA (with a load of 20...500 Ohms). Also with the aid of a jumper, the user can choose between a linear or a square-rooted signal. The latter is, for example, useful for measuring volume flows. At a supply voltage of 24 VAC/VDC, the maximum current consumption, including an LED display, is 210 mA. The sensor's IP54 enclosure has a diameter of 85 mm with an installation height of 58 mm. Two 6 mm tube ports for the pressure connection as well as M 16x1.5 or M 20x1.5 cable unions for cables and stranded wires of up to 1.5 mm² in size ensure easy fitting at the place of installation. The transmitters are in conformity with EN 60770 and EN 61326 as well as with RoHS according to 2002/95/EEC.