Bruel-Kjaer P-98/1

The Bruel-Kjaer P-98/1 reference sensor with accessories is a high-precision measurement device engineered to deliver accurate, consistent, and reliable reference data for calibration and monitoring applications. Designed for use in a wide range of industrial, laboratory, and field environments, the Bruel-Kjaer P-98/1 provides stable performance over extended periods, making it an essential tool for engineers, technicians, and maintenance professionals.

This reference sensor is ideal for applications requiring verification of measurement systems, calibration of monitoring devices, and ensuring compliance with industry standards. Its robust design ensures dependable operation even under challenging environmental conditions, such as exposure to vibration, dust, or fluctuating temperatures.

The Bruel-Kjaer P-98/1 features a high-quality sensing element that delivers precise readings with minimal drift over time. Combined with the included accessories, it offers enhanced versatility for different mounting configurations and connection setups. This makes it easy to integrate into both fixed and portable systems, supporting efficient workflows in industrial plants, testing facilities, and research labs.

Thanks to its superior build quality, the sensor is resistant to wear and environmental degradation, ensuring a long service life. Maintenance requirements are minimal, which reduces operational costs and downtime. The accessories included with the Bruel-Kjaer P-98/1 allow quick setup and reconfiguration for multiple applications, increasing its value as a multi-purpose measurement tool.

In calibration processes, the sensor plays a critical role in ensuring that other instruments operate within their specified tolerance ranges. In monitoring systems, it provides accurate baseline data that improves the reliability of trend analysis, predictive maintenance programs, and safety checks.

Its compatibility with various measurement and data acquisition systems makes it a versatile choice for industries such as energy, manufacturing, transportation, and environmental monitoring. Whether used for on-site verification or laboratory calibration, the Bruel-Kjaer P-98/1 delivers the precision and reliability required for mission-critical applications.

With decades of expertise in sensor technology, Bruel-Kjaer ensures that each P-98/1 unit is manufactured to the highest quality standards. This commitment to excellence is reflected in the sensor’s consistent performance, rugged design, and ease of integration.

By choosing the Bruel-Kjaer P-98/1 reference sensor with accessories, professionals can trust they are investing in a dependable, long-lasting, and accurate measurement solution that meets the demands of modern industrial and laboratory environments.

Technical Specifications

The base Brüel & Kjær Vibro P-98 is an optical reference sensor (keyphasor/tacho reference sensor) used to provide speed and phase reference signals in vibration monitoring systems, part of the SETPOINT/BKV Beyond condition-monitoring portfolio. The confirmed base specification is a 5V/30mA power supply requirement with a 4-pole male connector. B&K Vibro’s own documentation does not separately publish a variant explicitly named “P-98/1”; the “/1” suffix on this listing most likely denotes a cable-length or connector sub-variant following the same slash-suffix convention used elsewhere in B&K Vibro’s part numbering, but Seven Star LLC treats this as unconfirmed rather than asserting a specific meaning, and verifies the exact cable and connector configuration against the customer’s existing installation before quoting.

Applications

Optical reference sensors like the P-98 generate a once-per-revolution (or multiple-times-per-revolution, depending on the target pattern) pulse used by a monitoring system to establish shaft speed and provide a phase reference for balancing, order-tracking analysis, and startup/coastdown transient monitoring. This reference signal is essential input for a machinery protection or condition-monitoring system to correctly interpret vibration data in the context of actual running speed, which is why it is a standard companion sensor alongside radial vibration and position transducers on turbines, compressors, and generators.

Why Seven Star LLC

Seven Star LLC supplies genuine Brüel & Kjær Vibro optical reference sensors, including the P-98 series, to power generation, oil & gas, and petrochemical customers across Oman and the wider GCC, and confirms the exact cable length, connector type, and monitoring system compatibility required before confirming an order.

Why an Optical Keyphasor Reference

An optical reference sensor works by shining light at a reflective or contrasting target mark on the rotating shaft and detecting the reflected pulse once (or multiple times) per revolution, giving a completely non-contact means of establishing shaft speed and rotational phase. This is a useful alternative or complement to an eddy-current keyphasor probe in installations where a suitable flat target area for a proximity probe is not available, or where the optical sensor’s specific mounting geometry better suits the machine’s casing design.

Role in the Wider Protection System

The keyphasor signal a reference sensor like the P-98 provides is not simply a speed readout — it is the timing reference that lets a monitoring system correctly separate synchronous vibration components (related to shaft rotation) from non-synchronous ones, track order-based vibration during startup and coastdown, and support balancing work that depends on knowing the exact rotational phase at which peak vibration occurs. Without a working keyphasor reference, a protection system’s ability to correctly diagnose the source of an abnormal vibration reading is significantly reduced, which is why this sensor, though simple in function, is treated as a critical-path spare on most turbomachinery protection systems.

Ordering Notes

When quoting a P-98 reference sensor, Seven Star LLC confirms the exact cable length, connector type, and target/reflector configuration required to match the customer’s existing shaft and monitoring rack, since B&K Vibro’s reference-sensor range includes multiple sub-variants that are not universally interchangeable.

Request a Quote for Bruel-Kjaer P-98/1

Submit a formal inquiry through our RFQ page with your required cable length and monitoring system compatibility. We will confirm the correct P-98 configuration and provide a formal quotation.

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