The FESTO SPAN-B2R-G18M-PN-PN-L1, part number 8035545, is a compact electronic pressure sensor designed for industrial pneumatic systems that require stable switching performance, local display visibility, and flexible installation. According to FESTO’s current datasheet, this model measures relative pressure using a piezoresistive measuring cell and is configured for a measuring range of -1 to +1 bar (equivalent to -0.1 to +0.1 MPa or -14.5 to +14.5 psi). That bidirectional range makes it suitable for both vacuum and low positive pressure monitoring, which is a practical advantage in automation systems where one sensor family may be used across several pneumatic tasks.
Unlike simple mechanical pressure switches, the SPAN series is intended for modern machine building where pressure status must be monitored clearly and set accurately. FESTO describes the SPAN range as suitable for compressed air and non-corrosive gases, with typical uses including network monitoring, regulator monitoring, vacuum detection, leak testing, and object detection via back pressure. The sensor provides the pressure value to the control system as a switching signal, while the integrated display and menu functions allow local commissioning and parameter adjustment directly on the device. This makes the model useful not only for OEM equipment production, but also for maintenance, retrofitting, and replacement projects where quick setup matters.
For the exact model SPAN-B2R-G18M-PN-PN-L1, FESTO specifies two switch outputs, configurable as 2 x PNP or 2 x NPN, with switchable normally open or normally closed logic. The current datasheet also lists several switching modes, including window comparator, threshold comparator, and auto-differential detection. In practical terms, this means the same sensor can monitor whether pressure is present, whether pressure stays within a target band, or whether pressure changes over time in a way that indicates leakage or process deviation. That flexibility is one of the main reasons compact digital pressure sensors like this are widely adopted in pneumatic automation.
This sensor is also engineered for compact installation. The exact 8035545 variant uses a male G1/8 pneumatic thread together with an internal M5 thread, and FESTO lists an L1 plug connection with 4 electrical pins. Mounting can be done through front panel installation, threaded installation, or wall/surface bracket mounting, and the mounting position is specified as optional. This gives equipment builders more freedom when fitting the device into dense manifolds, compact valve islands, or small machine subassemblies. The series documentation also emphasizes the SPAN family’s compact 30 x 30 mm design and fast commissioning concept using the L1 plug and quick tubing arrangement.
One specification buyers often need for logistics and mechanical design is weight. FESTO’s current datasheet for part number 8035545 lists the product weight as 46 g. That is a low mass, which is consistent with a compact panel-mount pressure sensor intended for light industrial pneumatic assemblies. The housing is specified as reinforced polyamide, while media-contacting materials include FPM and high-alloy stainless steel, giving the sensor a practical balance between light weight, durability, and chemical compatibility for standard industrial compressed-air environments.
Main Technical Specifications
| Item | Specification |
|---|---|
| Brand | FESTO |
| Part Number | 8035545 |
| Model | SPAN-B2R-G18M-PN-PN-L1 |
| Product Type | Electronic pressure sensor |
| Measured Variable | Relative pressure |
| Measuring Method | Piezoresistive pressure sensor |
| Pressure Measuring Range | -0.1 to +0.1 MPa |
| Pressure Measuring Range | -1 to +1 bar |
| Pressure Measuring Range | -14.5 to +14.5 psi |
| Maximum Overload Pressure | 0.5 MPa / 5 bar / 72.5 psi |
| Operating Medium | Compressed air to ISO 8573-1:2010 [7:4:4], inert gases |
| Lubricated Operation | Permissible |
| Medium Temperature | 0 to 50 °C |
| Ambient Temperature | 0 to 50 °C |
| Accuracy | ±1.5 %FS |
| Repetition Accuracy | ±0.3 %FS |
| Temperature Coefficient | ±0.05 %FS/K |
| Switching Outputs | 2 x PNP or 2 x NPN, switchable |
| Switching Functions | Window comparator, threshold comparator, auto-differential detection |
| Switching Element Function | N/O or N/C, switchable |
| Maximum Output Current | 100 mA |
| Operating Voltage Range | DC 15 to 30 V |
| Electrical Connection | Plug, L1J connection system, 4-pin |
| Pneumatic Connection | Male G1/8, female M5 |
| Mounting Options | Front panel, threaded, wall/surface bracket |
| Mounting Position | Any |
| Display Type | Illuminated LCD |
| Display Units | MPa, bar, inchH2O, inchHg, kPa, kgf/cm², mbar, mmHg, psi |
| Degree of Protection | IP40 |
| Product Net Weight | 46 g |
| Housing Material | Reinforced polyamide |
The values above are based on FESTO’s current datasheet for the exact part number 8035545.
Functional Advantages in Industrial Use
A major advantage of the SPAN-B2R-G18M-PN-PN-L1 is its dual vacuum and low-pressure capability. Many sensors are selected either for vacuum-only use or for positive pressure measurement, but this model covers both sides of the low-pressure range. That makes it useful in applications such as vacuum pickup verification, regulator monitoring, leak testing, and pressure-threshold supervision in compact pneumatic systems. For machine builders, this can simplify spare-part strategy because the same measuring range supports several use cases in one product family.
Another important point is usability. FESTO states that the SPAN series includes a clear display, intuitive menu navigation, teach-in capability, adjustable low-pass filtering, min/max value memory, and optional security code protection. On the exact 8035545 datasheet, FESTO also lists setting via display and buttons and PIN-code-based protection against manipulation. These features matter in the field because they reduce commissioning time and help prevent unauthorized changes after setup. For maintenance teams, local display access often makes troubleshooting faster than using hidden or controller-only diagnostic logic.
From a control perspective, the 2 x PNP/NPN switchable outputs make integration easier across different PLC standards. Instead of carrying separate sensor variants for different output logic, a machine builder can often standardize on one configurable version. With a maximum output current of 100 mA, the sensor fits standard industrial signal wiring requirements, and the DC 15 to 30 V operating range matches common 24 V DC automation systems. These are practical integration details that matter during machine design and replacement sourcing.
Typical Application Areas
| Application Area | Why This Model Fits |
|---|---|
| Pneumatic network monitoring | Detects whether system pressure is present and within limits |
| Regulator monitoring | Confirms pressure remains in the intended operating band |
| Vacuum pick-up verification | Checks whether suction has successfully gripped a part |
| Leak testing | Uses differential pressure behavior to identify pressure loss over time |
| Object detection by back pressure | Supports sensing logic in pneumatic handling tasks |
| Compact machine modules | Small 30 x 30 mm class design and 46 g weight suit tight spaces |
These application scenarios are consistent with FESTO’s published SPAN series description and the exact switching and measuring features of part number 8035545.
Model Structure and Selection Value
The product code itself is commercially important. In FESTO’s SPAN product overview, B2R identifies the -1 to +1 bar pressure range, while G18M indicates the G1/8 male pneumatic connection with internal M5 thread. The PN-PN portion denotes the switching-output configuration, and L1 refers to the plug connection style used for fast installation. This matters because the SPAN family includes multiple pressure ranges, connection formats, and output versions. Selecting the wrong suffix can easily result in an incorrect thread type or an unsuitable measuring range.
Conclusion
The FESTO 8035545 SPAN-B2R-G18M-PN-PN-L1 is a compact, configurable, and practical pressure sensor for industrial pneumatic systems that need reliable low-pressure and vacuum monitoring. With a -1 to +1 bar measuring range, dual switch outputs configurable as PNP or NPN, illuminated LCD display, multiple switching functions, and a low 46 g product weight, it is well suited for automation equipment, leak-test systems, regulator supervision, and compact pneumatic assemblies. For buyers who need a genuine FESTO pressure sensor with clear model identification and flexible installation, this part is a technically solid choice.
