Configurable Pressure Transmitter FlexBar 3431 with Profibus communication

05 September 2008

With the FlexBar 3431, Baumer’s product segment Process Instrumentation offers a fully configurable pressure transmitter with Profibus PA communication.

Photo: Baumer
Photo: Baumer

Due to its 3A-approved stainless steel housing and hygienic process connections, the device is suitable for the pharmaceutical and food industry. The wide range of process connections available makes the FlexBar 3431 the ideal choice for almost all types of pressure measuring applications even in Ex areas.

The FlexBar 3431 was designed according to the Profibus PA profile 3.0 and is fully configurable with the Simatic PDM software, allowing online process monitoring, transmitter configuration and multiple process control in 2-wire networks especially suited for Ex applications. In the EEx ia IIC T5 version, the FlexBar 3431 can be connected with up to six instruments.

Based on a piezoresistive polysilicon strain gauge sensor, the instrument can measure absolute or relative pressure of up to 400 bar. With its fast response time, an accuracy of <0.2% of full scale and excellent temperature compensation, the FlexBar 3431 works with media temperatures ranging from -30 to +200°C and overpressure of up to 400% (max. 600 bar).

The electronics are separated from the media by a thin diaphragm and an oil filling. The FlexBar 3431 is available with three different oil fillings, including a mineral oil complying with the FDA demands for applications in the food and pharmaceutical industry. The electrical connection is established via a M16 gland or a 4-pole M12 plug. For local read-out, the FlexBar 3431 is available with an integrated display.

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