The IFM PN2593 is a compact electronic pressure sensor with an integrated digital display, designed for precise monitoring and control of pressure in modern industrial automation systems. It combines a wide measuring range, robust mechanical construction and flexible electrical outputs (including IO-Link) in one device, making it suitable for OEM machine builders and maintenance engineers who want a reliable “fit-and-forget” solution.

1. Key Technical Data (Quick Reference)

This table gives a fast overview for specification comparison and selection in design or procurement.

2. Measuring Range and Performance

The PN2593 covers a measuring range from vacuum up to 25 bar, which means it can monitor slight negative pressures as well as typical low- to medium-pressure hydraulic and pneumatic circuits. The operating span of -1…25 bar (roughly -14.5…362.5 psi) allows one single part number to be used in many different machines, reducing the number of variants an OEM must stock. 

Accuracy is a strong point of this sensor. The switch point accuracy is specified at around ±0.4% of span, with repeatability better than ±0.1% under normal temperature conditions. Long-term drift is also tightly controlled, with typical stability better than ±0.05% of span over six months.  These figures help ensure that the thresholds you set for pump protection, filter monitoring or system pressure control remain valid over long operating periods, without constant re-adjustment.

3. Robust Mechanical and Environmental Design

Mechanically, the PN2593 is built for demanding environments. The ceramic-capacitive measuring cell provides high overload resistance, while the sensor body and process connection are designed to withstand a rated pressure of 150 bar and a minimum burst pressure of 350 bar.  This makes it suitable not only for normal operating conditions, but also for pressure spikes and transient peaks that are common in hydraulic circuits.

The process connection uses a standard G 1/4 external thread with an internal M5 port. This threading is widely used in European and international machinery, allowing direct installation into manifolds, pipes, cylinders and other components without special adapters. 

The specified temperature range of -25…80 °C for both medium and ambient environments allows the sensor to work in cold warehouses, standard production halls and many process areas without additional heating or cooling. Together with an IP65/IP67 ingress protection rating, the PN2593 is well protected against dust and water spray during wash-down or routine cleaning. 

4. Flexible Outputs, Analogue Signal and IO-Link

One of the main advantages of the PN2593 is its very flexible I/O configuration. The device provides two digital outputs and one analogue output. The digital outputs are PNP/NPN configurable and can be set individually as normally open or normally closed, allowing the same sensor to act as a simple pressure switch, a window comparator or an alarm contact. 

The analogue output can be configured for either 4–20 mA current or 0–10 V voltage, with a scalable range (for example, mapping a narrower process range onto the full analogue span). This makes integration with almost any PLC, DCS or analogue input card straightforward.

In addition, the PN2593 supports IO-Link communication. Through an IO-Link master, users can access process values, diagnostic information and configuration parameters digitally, without needing to press buttons on the device. IO-Link allows remote scaling, switching logic changes and parameter cloning across multiple sensors, which simplifies commissioning and maintenance in large machines or distributed systems.

5. User-Friendly Display and Commissioning

The PN2593 is not just a hidden transducer; it includes a bright 4-digit display on the sensor head. The display can show the live process pressure and can switch between red and green indication. In practice, this colour change is often used to highlight “OK” and “alarm” ranges so that operators can see at a glance whether the process is within limits. 

Clearly visible LEDs indicate switching status and units. The upper part of the housing can be rotated by around 345°, allowing the display and buttons to be oriented correctly even when the process connection must follow a fixed pipe or manifold orientation. Parameter setting is done via simple pushbuttons, with intuitive menus for hysteresis/window mode, switching delays, damping and analogue scaling. For many users, this means that the sensor can be commissioned directly in the field without a laptop.

6. Typical Applications

Because of its measuring range, robust construction and flexible output concept, the IFM PN2593 fits into a wide variety of applications, for example:

• Hydraulic power units – monitoring system pressure, protecting pumps against low-pressure conditions, and triggering alarms on overpressure.

• Pneumatic circuits – ensuring sufficient compressed air for actuators, and detecting leaks or pressure drops in air supply lines.

• Pump and compressor protection – using the switching outputs to stop equipment in the event of suction loss, blocked filters, or abnormal discharge pressure.

• Cooling and lubrication systems – supervising pressure in coolant and lubricant lines in machine tools and process machinery.

• General factory automation – integrating into skid-mounted systems, test benches, and production lines where a compact pressure switch with clear local indication is needed.

The ability to work with both liquids and gases, combined with stable long-term performance and good vibration resistance, makes the PN2593 a genuine “multi-purpose” sensor in many plants. 

7. Benefits for OEMs and Plant Engineers

For OEM machine builders, choosing PN2593 simplifies the bill of materials. One part number covers vacuum up to 25 bar, offers both digital and analogue signals, and supports IO-Link. That reduces the number of sensor variants to design in, purchase and stock as spare parts.

Maintenance and production engineers benefit from clear on-site diagnostics: the red/green display, status LEDs and numeric pressure value help with fast troubleshooting when something goes wrong in the system. Combined with IO-Link diagnostics, process values and device status can also be monitored centrally from a control room or SCADA system. 

Finally, the combination of robust pressure ratings, wide temperature range, IP protection and long MTTF (over 100 years according to manufacturer calculations) gives confidence that the sensor will survive in real-world industrial environments without frequent replacement. 

In short, the IFM PN2593 is a versatile pressure sensor with display that brings together wide measuring capability, strong mechanical design and modern communication options. It is well suited for use as a standard pressure monitoring building block across many different machines and installations in industrial automation.