The PI27/ PI28 series pressure sensors from ifm electronic have clearly visible LED displays that cannot only be connected as three- or four-wire units but also as two-wire units in a current loop. This reduces the wiring complexity in new installations and facilitates exchange in existing two-wire connections. Housed in stainless steel, the PI2 series pressure sensors are extremely versatile as they can be used as simple loop-powered two-wire transducers or as three-wire switches. The high visibility LED display works in all modes.
Ifm offers the PI2 series with either a standard conical G1 process connection (PI28) or the company’s own adaptable Aseptoflex Vario thread (PI27). The Aseptoflex Vario can be combined with one of many process adapters conforming to commonly used hygienic standards. As hygienic instruments for food and other processes are often exposed to high temperatures, the PI2 series is designed with a high temperature medium rating up to 145°C, and is therefore suitable for SIP and CIP processes. All sensors in the series meet hygiene standards EHEDG, 3A and FDA.
Used as a two-wire loop-powered pressure transducer, the PI2 series will display and transmit a scalable 4-20 mA signal. With a third connection it becomes a switch with a PNP or NPN switched output, and with a fourth connection both the switch and the analog signals are available to the user.
By using the pushbuttons on the unit, it is easy to scale the analog range, allocate switchpoints and customise the scores of other available parameters. If the sensor is connected using four wires, this can even be done remotely since the PI2 unit is fitted with the latest I/O-link point-to-point communication. High overall accuracy (0,2%) and electronic temperature compensation apply across the board, regardless of the pressure range of the individual unit. This can be one of eight different ranges, examples being -1 to 25 bar, or -0,051 to 0,1 bar.
With an IP rating up to IP69K the stainless steel housing is perfectly suited to a food environment. Wetted parts consist only of high grade stainless, high purity ceramics and PTFE. A full range of accessories complements the PI2 range, from process adapters to wet environment connectors and software for remote setting.
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