In many industrial plants, reliable pressure measurement keeps everything running safely and efficiently. When a pump cavitates, a filter clogs, or a hydraulic line loses pressure, you want a sensor you can trust to detect the issue quickly. That’s where the SICK PBT-RB250SG1SSNALA0Z pressure transmitter comes in. This compact stainless-steel device measures up to 250 bar and sends a robust 4–20 mA signal back to your PLC or controller, helping you monitor critical liquid and gas pressures in real time.
In this guide, we’ll walk through what makes the SICK PBT-RB250SG1SSNALA0Z pressure transmitter a solid choice for machine builders, plant engineers, and maintenance teams. We’ll explore its technical specifications, internal design, mounting and wiring tips, and the kinds of applications where it really shines. By the end, you’ll have a practical understanding of how this SICK PBT-RB250SG1SSNALA0Z pressure transmitter fits into your system and what to check before choosing it as your go-to pressure device.
What Is the SICK PBT-RB250SG1SSNALA0Z Pressure Transmitter?
At its core, the SICK PBT-RB250SG1SSNALA0Z pressure transmitter is a gauge-pressure sensor designed for industrial fluids. It is part of SICK’s PBT family, a range of compact transmitters built to cover low to high pressure ranges in both liquid and gaseous media. This particular version measures from 0 to 250 bar (relative to ambient) and outputs a standard 4–20 mA current signal over a two-wire loop.
Because the SICK PBT-RB250SG1SSNALA0Z pressure transmitter is a gauge-pressure device, it compares the process pressure to the surrounding atmosphere. That makes it suitable for tasks like monitoring hydraulic lines, coolant pressures, water supply lines, and many other closed systems where you want to know pressure above ambient. The 0–250 bar measuring range is broad enough for many hydraulic and general industrial processes, while still delivering good resolution for continuous control.
Physically, the SICK PBT-RB250SG1SSNALA0Z pressure transmitter comes in a stainless-steel housing with a hermetically sealed stainless-steel diaphragm. This design keeps the sensing element protected from process media and ensures good corrosion resistance. The process connection is a G¼ A threaded port (DIN 3852-E) with a 27 mm hex, so it can be easily installed into standard manifolds, tees, or pipe adapters used in industrial machinery.
Key Technical Specifications of the SICK PBT-RB250SG1SSNALA0Z Pressure Transmitter
Understanding the key specifications of the SICK PBT-RB250SG1SSNALA0Z pressure transmitter helps you judge how it will behave in your application. Below are the headline specs that matter most to designers and maintenance engineers.
The SICK PBT-RB250SG1SSNALA0Z pressure transmitter covers a measuring range of 0 to 250 bar, with an accuracy of ≤ ±1% of span (BFSL – best-fit straight line). Non-linearity is typically ≤ ±0.5% of span, hysteresis is around 0.16% of span, and long-term drift is ≤ 0.1% per year. This means that once installed and calibrated, the device will provide stable readings over long periods, even in demanding production environments.
The output of the SICK PBT-RB250SG1SSNALA0Z pressure transmitter is a 4–20 mA signal on a two-wire loop, which is a proven standard in process and automation systems. This standard 4–20 mA current loop is widely used because it is resistant to electrical noise and allows for long cable runs without significant signal loss. The transmitter operates from an 8–30 V DC supply when configured for 4–20 mA output. This wide supply range makes it easy to integrate with existing control panels, loop-powered displays, and remote I/O modules.
From a mechanical perspective, the SICK PBT-RB250SG1SSNALA0Z pressure transmitter uses a G¼ A process connection in accordance with DIN 3852-E, with a hex size of 27 mm. Wetted parts and the diaphragm are made from 316L stainless steel, a material widely used for its corrosion resistance and suitability for many industrial fluids. The unit weighs around 80 g, making it compact and easy to mount even in tight spaces.
The ambient and process temperature range for the SICK PBT-RB250SG1SSNALA0Z pressure transmitter is typically 0 to +80 °C, with storage temperatures from –40 to +70 °C. That range covers many machine, plant, and utility applications. Response time is less than 4 ms, so pressure changes are detected and transmitted very quickly, which is especially important for dynamic systems like fast-moving hydraulics.
Design and Construction of the SICK PBT-RB250SG1SSNALA0Z Pressure Transmitter
The construction of the SICK PBT-RB250SG1SSNALA0Z pressure transmitter is all about durability and long service life. Inside the housing, the sensor uses a stainless-steel diaphragm that deflects under pressure, transferring this change to an internal measuring element. For certain ranges and configurations, silicone oil may be used as a fill fluid between the diaphragm and the measuring cell to ensure accurate signal transmission.
The wetted parts of the SICK PBT-RB250SG1SSNALA0Z pressure transmitter—including the diaphragm and the process connection—are made from 316L stainless steel. This material is valued for its corrosion resistance and suitability for a wide variety of media, including water, oils, coolants, and many non-aggressive chemicals. It also contributes to the hygienic and easy-to-clean design required in some industries.
Externally, the housing of the SICK PBT-RB250SG1SSNALA0Z pressure transmitter is also stainless steel, giving the device a rugged feel and ensuring good protection in daily operation. The electrical connection is via an L-shaped DIN connector (DIN EN 175301-803 A), which is a well-known industrial standard that supports quick replacement and straightforward cable assemblies. The complete sensor with connector achieves an IP65 ingress protection rating, meaning it is dust-tight and protected against water jets.
A standard NBR (nitrile) seal is used in the SICK PBT-RB250SG1SSNALA0Z pressure transmitter for the process side. NBR is commonly chosen for oils, hydraulic fluids, and water-based media. For applications with higher temperatures or more demanding media, other PBT variants offer seals in FKM (FPM), which can extend operating temperature and chemical resistance.
Electrical Interface of the SICK PBT-RB250SG1SSNALA0Z Pressure Transmitter
From an electrical design perspective, the SICK PBT-RB250SG1SSNALA0Z pressure transmitter is straightforward to integrate. Because it uses a 4–20 mA two-wire loop, it can be powered and read over the same pair of conductors, simplifying field wiring. The output current is proportional to the measured pressure: 4 mA corresponds to the lower end of the measuring range (0 bar), while 20 mA corresponds to the upper end (250 bar).
A typical connection for the SICK PBT-RB250SG1SSNALA0Z pressure transmitter involves a 24 V DC power supply feeding the loop, with the transmitter in series with a PLC analog input card or a dedicated current input module. The DIN connector uses standard pin assignments, with the positive supply on one pin and the loop return on another, allowing easy replacement or testing.
Because the SICK PBT-RB250SG1SSNALA0Z pressure transmitter operates over an 8–30 V DC supply range, it is tolerant of voltage drops along long cable runs. This is useful in larger plants where the control cabinet may be located far from the sensor. The current output is also immune to many forms of electrical noise and signal degradation, making it well suited for environments with motors, drives, and welding equipment.
The current consumption of the SICK PBT-RB250SG1SSNALA0Z pressure transmitter is generally ≤ 25 mA, which includes the 4–20 mA signal itself. That means you can power many such loop devices from a single 24 V DC power supply, provided you size the supply appropriately and account for all loads.
Mechanical Installation of the SICK PBT-RB250SG1SSNALA0Z Pressure Transmitter
Correct mechanical installation is key to getting reliable readings from a SICK PBT-RB250SG1SSNALA0Z pressure transmitter. The device is designed to screw into a matching G¼ A port, with sealing according to DIN 3852-E. When tightening the sensor, always apply torque using a 27 mm spanner on the hexagonal process connection—not on the body or connector.
Before installing the SICK PBT-RB250SG1SSNALA0Z pressure transmitter, check that the process port is clean and free of debris. Fit a suitable seal, either an elastomer O-ring or thread sealant such as PTFE tape, depending on the specific adapter used. This ensures a leak-free seal and protects the diaphragm from contamination. Take care not to damage the diaphragm face when handling the sensor.
SICK recommends mounting the SICK PBT-RB250SG1SSNALA0Z pressure transmitter vertically with the pressure port facing downward. This is the orientation in which the sensor is factory-calibrated, so it helps minimize any small gravitational effects on the measuring cell. If the sensor must be mounted differently due to space constraints, it will still function, but you should be aware of possible minor deviations at extremely high accuracy requirements.
In applications with vibration or mechanical stress, consider using a mounting bracket with the SICK PBT-RB250SG1SSNALA0Z pressure transmitter. SICK offers an aluminum wall-mount bracket designed for PBT sensors with a 27 mm hex, which helps relieve strain on the process connection and prevents damage from accidental knocks. This is especially useful in mobile machinery, pressurized skids, or areas with frequent maintenance activity.
Environmental Limits and Durability of the SICK PBT-RB250SG1SSNALA0Z Pressure Transmitter
Industrial environments can be harsh, so it’s important to understand the environmental limits of the SICK PBT-RB250SG1SSNALA0Z pressure transmitter. Its operating and process temperature range of 0 to +80 °C covers many hydraulic, pneumatic, and water-based systems. Storage temperatures from –40 to +70 °C allow the device to withstand cold warehouses or transport conditions before installation.
The SICK PBT-RB250SG1SSNALA0Z pressure transmitter is rated for resistance to shock and vibration, withstanding shocks up to around 500 g and vibrations near 10 g in the standard configuration. This level of robustness makes it suitable for use on machinery with moving parts, pumps, and compressors where vibration is a daily reality.
With an IP65 ingress protection rating, the SICK PBT-RB250SG1SSNALA0Z pressure transmitter is dust-tight and protected against water jets from any direction. This means it can be used in washdown areas, near spray, or in dusty production halls, provided the cable gland and connector are installed correctly. Proper sealing of the DIN connector is essential to maintain the IP65 rating.
Long-term durability is also a strong point of the SICK PBT-RB250SG1SSNALA0Z pressure transmitter. The sensor is rated for up to 10^8 pressure cycles, which is more than enough for most industrial applications over many years of operation. Combined with a long-term drift of only about 0.1% per year, this means you can expect consistent measurements with minimal readjustment over the life of the equipment.
Compliance and Safety Features of the SICK PBT-RB250SG1SSNALA0Z Pressure Transmitter
When choosing a pressure device, compliance with relevant standards is just as important as performance. The SICK PBT-RB250SG1SSNALA0Z pressure transmitter is CE-marked and compliant with key European directives, including the Pressure Equipment Directive (PED) and the Electromagnetic Compatibility (EMC) Directive. It is tested to EN 61326-2-3 for EMC performance, ensuring that it operates reliably even in electrically noisy environments.
The SICK PBT-RB250SG1SSNALA0Z pressure transmitter also complies with IEC/EN 61010-1 for electrical safety. SICK specifies the use of a limited-energy supply circuit, especially for installations above 2000 m altitude, to ensure safe operation. This focus on safety and compliance helps system integrators meet their own machine and plant standards more easily.
It is important to note that the SICK PBT-RB250SG1SSNALA0Z pressure transmitter is not intrinsically safe by default. It does not come with specialized hazardous-area certifications such as ATEX or IECEx in this standard version. If your application involves explosive atmospheres, you should either mount the device outside the hazardous zone or consider alternative models designed specifically for such environments.
Nevertheless, for general industrial applications within standard zones, the SICK PBT-RB250SG1SSNALA0Z pressure transmitter delivers a solid balance of performance and compliance. Its CE marking and adherence to widely recognized standards make it straightforward to document in risk assessments and technical files.
Variants and Accessories in the SICK PBT Series
The SICK PBT-RB250SG1SSNALA0Z pressure transmitter is part of a broader PBT family that offers many different ranges and configurations. If 0–250 bar does not match your application, you can find other gauge-pressure variants such as 0–100 bar or 0–400 bar in the same form factor. For example, the PBT-RB100 series and PBT-RB400 series offer similar performance at different pressure ranges.
You will also find absolute and compound pressure versions in the same PBT series, alongside the SICK PBT-RB250SG1SSNALA0Z pressure transmitter. This means you can standardize on a single sensor family across your plant while still matching each application’s pressure type and range. Output options in the family include not only 4–20 mA but also voltage outputs like 0–10 V or 0–5 V in three-wire configurations.
Several connector styles are available beyond the L-shaped DIN used by the SICK PBT-RB250SG1SSNALA0Z pressure transmitter. M12 round connectors and cable-lead versions give you flexibility in how the sensor connects into your wiring scheme. Likewise, process connections can be selected to match regional standards or specific manifolds, including G¼ B or ½" NPT threads.
There are also useful accessories built around the SICK PBT-RB250SG1SSNALA0Z pressure transmitter and its sister models. These include the aluminum wall-mount bracket for secure installation, ready-made connector assemblies and cables, protective screens, and sealing elements. Using original or compatible accessories helps you maintain the IP rating, minimize wiring errors, and achieve a neat, serviceable installation.
Typical Applications of the SICK PBT-RB250SG1SSNALA0Z Pressure Transmitter
The 0–250 bar range and rugged design of the SICK PBT-RB250SG1SSNALA0Z pressure transmitter make it suitable for many different applications. In hydraulic systems, it can monitor line pressure, verify that pumps and valves are operating within their design limits, and provide feedback for closed-loop control. This is common on presses, injection molding machines, lifting equipment, and mobile machinery.
In pneumatic systems, the SICK PBT-RB250SG1SSNALA0Z pressure transmitter can be used to supervise air supply lines, booster stations, and high-pressure air reservoirs. The 4–20 mA output can feed directly into a PLC or SCADA system, where pressure readings are displayed for operators and logged for maintenance analysis.
The SICK PBT-RB250SG1SSNALA0Z pressure transmitter also finds a place in pump and compressor monitoring. It can provide suction and discharge pressure feedback, detect blocked filters or lines, trigger alarms when pressure drops or spikes, and help optimize energy use by supporting variable-speed control strategies.
Other uses for the SICK PBT-RB250SG1SSNALA0Z pressure transmitter include monitoring coolant pressure in machine tools, measuring pressure in water treatment systems, or supervising process lines in general factory automation. Because it is built from stainless steel and uses widely compatible seals, it can handle a wide range of non-aggressive fluids encountered in these environments.
How to Select the SICK PBT-RB250SG1SSNALA0Z Pressure Transmitter for Your System
Choosing the right pressure device is more than just matching a number on a datasheet. When considering the SICK PBT-RB250SG1SSNALA0Z pressure transmitter, start by confirming that the 0–250 bar range suits your application. Ideally, your normal operating pressure should fall between about 30% and 70% of the full scale, so that you use the most linear and accurate portion of the transmitter’s span.
Next, look at the media and environmental conditions where the SICK PBT-RB250SG1SSNALA0Z pressure transmitter will be installed. Check chemical compatibility between 316L stainless steel, the NBR seal, and your process fluid. If your media or temperature profile demands it, another PBT variant with an FKM seal or a different range may be more appropriate.
You should also consider how the SICK PBT-RB250SG1SSNALA0Z pressure transmitter will be mounted. Confirm that you have a suitable G¼ A port available, or plan to use an adapter fitting. Check the available space to ensure that the DIN connector can be plugged and unplugged easily, and that there is room for any required mounting bracket.
Lastly, evaluate how the SICK PBT-RB250SG1SSNALA0Z pressure transmitter will connect electrically to your control system. Verify that your PLC or I/O modules accept 4–20 mA signals, and confirm the supply voltage for the loop. Make sure the total loop resistance (cabling, input modules, and any indicators) falls within the permitted range for the transmitter’s supply voltage.
Maintenance and Troubleshooting Tips for the SICK PBT-RB250SG1SSNALA0Z Pressure Transmitter
Once the SICK PBT-RB250SG1SSNALA0Z pressure transmitter is installed, it normally requires very little maintenance. However, periodic checks can help catch issues early. Visually inspect the sensor and its connector for damage, moisture ingress, or loose fittings. Check the cable strain relief and sealing elements to maintain the IP65 rating.
If you suspect measurement errors from the SICK PBT-RB250SG1SSNALA0Z pressure transmitter, compare its readings with a calibrated reference gauge or a portable test instrument temporarily connected to the same point in the system. Deviations can indicate process issues, sensor ageing, or wiring faults. Because the long-term drift is small, large errors are more likely to be due to installation conditions than internal sensor failure.
Electrical troubleshooting with the SICK PBT-RB250SG1SSNALA0Z pressure transmitter usually begins with checking the loop current and supply voltage. Ensure that the power supply is within the 8–30 V DC range and that the loop current changes logically as pressure varies. If the signal is stuck at 4 mA or 20 mA, this may indicate a broken sensor, a wiring error, or pressure outside the rated range.
Occasionally, you may need to remove the SICK PBT-RB250SG1SSNALA0Z pressure transmitter for calibration or cleaning. Always depressurize the system first and follow plant safety procedures. Use the 27 mm hex and avoid twisting the housing. When reinstalling, make sure to use a fresh seal and tighten to the manufacturer-recommended torque.
Related Product Collections for Pressure and Sensing Solutions
To help readers explore more industrial sensing options that complement the SICK PBT-RB250SG1SSNALA0Z pressure transmitter, you can guide them toward these relevant collections at Industrial Electrical Warehouse:
- SICK Sensors → – Discover a wide range of SICK devices, including pressure, photoelectric, and distance sensors used across automation, materials handling, and machine safety applications.
- Sensors and Accessories → – Browse sensor families, mounting brackets, connector kits, and complementary accessories designed to help you build complete sensing solutions around your pressure measurement points.
- Other Sensors → – Explore additional sensing technologies from trusted brands, allowing you to combine the SICK PBT-RB250SG1SSNALA0Z pressure transmitter with level, proximity, and specialty sensors in the same installation.
Conclusion: Getting the Best from Your SICK PBT-RB250SG1SSNALA0Z Pressure Transmitter
The SICK PBT-RB250SG1SSNALA0Z pressure transmitter brings together robust construction, accurate measurement, and a versatile 0–250 bar range in a compact, stainless-steel package. With its 4–20 mA two-wire output, G¼ A process connection, and IP65 protection, it integrates easily into modern automation systems while standing up to the mechanical and environmental stresses of real-world applications.
By understanding the capabilities, installation requirements, and application strengths of the SICK PBT-RB250SG1SSNALA0Z pressure transmitter, you can design more reliable systems, reduce unplanned downtime, and simplify maintenance. Whether you’re monitoring hydraulic pressures, supervising pumps and compressors, or tracking process pressures in plant utilities, this sensor can become a dependable part of your instrumentation toolkit.
If the specifications and features of the SICK PBT-RB250SG1SSNALA0Z pressure transmitter align with your project, it’s worth taking a closer look at the dedicated product page provided by your preferred supplier or system integrator. There you can review detailed datasheets, check available accessories and variants, and confirm that this transmitter is the right fit for your next installation.
