Bruel-Kjaer -AO-0087-D050
Overview
The Brüel & Kjær AO-0087-D050 is a low-noise coaxial BNC-to-BNC measurement cable used to connect microphones, preamplifiers, or accelerometers to conditioning amplifiers and data acquisition front ends. The “D050” segment of the part number indicates a 50-meter cable length in B&K’s D-series length coding (used for lengths under approximately 100m; longer runs use the separate M-series coding), giving technicians the reach needed to position a measurement microphone or sensor well away from the recording or analysis equipment without sacrificing signal integrity.
Technical Specifications
As a low-noise coaxial cable, the AO-0087 is specifically constructed to minimize triboelectric noise — electrical artifacts generated by the cable’s own mechanical flexing — which is critical when transmitting the very small millivolt-level signals typical of measurement microphones and accelerometers over a long cable run. Both ends terminate in BNC connectors, matching the standard interface used across B&K’s acoustic and vibration conditioning amplifiers, preamplifiers, and data acquisition hardware.
Applications
This cable is used wherever a measurement microphone or vibration sensor needs to be positioned at a distance from the recording system — environmental noise monitoring surveys, building acoustics testing, electroacoustic product testing, and industrial vibration studies where the measurement point is not conveniently close to the analyzer or data logger. Its low-capacitance, low-noise design keeps signal degradation to a minimum even at the full 50m length, which matters directly for high-sensitivity measurement microphones where every decibel of unwanted noise affects the validity of the result.
Cable Care and Handling
Because low-noise measurement cables rely on their internal shielding and conductor treatment to suppress triboelectric noise, rough handling, sharp bends, or crushing damage can degrade this property even when the outer jacket looks undamaged, silently introducing noise into a measurement chain that would otherwise pass a routine visual inspection. Best practice on long-run installations like a 50-meter cable is to secure the run at intervals along cable trays or conduit rather than leaving it to flex freely, and to periodically test the full measurement chain against a known calibration source rather than assuming a visually intact cable is still performing to specification.
Matching the Measurement Chain
A cable is only one link in a measurement chain that also includes the microphone or sensor, any preamplifier, and the conditioning amplifier or data acquisition front end — all of which must be electrically and mechanically compatible for the system to deliver the accuracy each individual component is rated for. Seven Star LLC helps customers confirm that a replacement or additional AO-0087 cable will integrate correctly with their existing B&K instrumentation, rather than supplying a cable in isolation and leaving compatibility to be discovered on site.
Typical Industrial Use in Oman and the GCC
Across Oman’s oil & gas, petrochemical, and power generation sectors, cables of this type connect vibration accelerometers and measurement microphones mounted on turbines, compressors, and pumps back to portable analyzers or permanently installed monitoring racks, often over distances that a short standard cable cannot cover. Facilities running formal noise or vibration surveys under recognized standards depend on cabling built to this specification to keep the entire measurement chain’s calibration valid over the full run length.
Why Seven Star LLC
Seven Star LLC supplies genuine Brüel & Kjær acoustic and vibration measurement accessories, including the AO-0087 cable series, to consultancies, industrial safety teams, and calibration laboratories across Oman and the wider GCC, and confirms the exact length and connector configuration required to match the customer’s existing measurement chain before confirming an order.
Understanding Triboelectric Noise
Triboelectric noise arises from friction between a cable’s internal conductor, insulation, and shield layers as the cable flexes — the mechanical movement generates small stray electrical charges that appear as noise superimposed on the genuine measurement signal. Because measurement microphones and accelerometers already output very small signals (often in the low millivolt range before amplification), a cable that is not specifically engineered to suppress this effect can introduce measurable error into a survey, particularly at low frequencies where triboelectric artifacts are most pronounced. Low-noise cable designs like the AO-0087 typically use a graphite or similar conductive coating between the shield and insulation layers specifically to drain away these stray charges before they couple into the signal conductor.
Connector Interface
BNC connectors were chosen as the standard interface across much of B&K’s acoustic and vibration instrumentation because they provide a quick, twist-lock connection that resists accidental disconnection during field work while still allowing rapid reconfiguration of a measurement setup between test points. Because the BNC interface is common across many manufacturers’ equipment as well, customers occasionally ask whether a generic BNC cable can substitute for the AO-0087 — Seven Star LLC advises against this for precision measurement work, since a generic cable will not carry the same low-noise construction and can silently degrade measurement quality in exactly the way a standard cable is not built to prevent, and any resulting error is often invisible until the measurement is challenged or fails a calibration check.
Request a Quote for Bruel-Kjaer -AO-0087-D050
Submit a formal inquiry through our RFQ page with the required cable length and the microphone or sensor model it will connect to. We will confirm the correct AO-0087 configuration and provide a formal quotation.
Ordering Notes
When quoting a replacement or additional AO-0087 cable, Seven Star LLC confirms the exact length required and the specific microphone, preamplifier, or accelerometer model it will connect to, since B&K’s cable range covers multiple connector and length combinations that are not interchangeable across every instrument in the product line.
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