Brand: Brüel & Kjær

B&K Vibro IN-083 Eddy-Current Displacement Sensor – IN-083/3/070/50/0/206

Name: B&K Vibro IN-083 Displacement Sensor – Datasheet & Quote
Brand: Brüel & Kjær

Description

Overview

The Brüel & Kjær Vibro IN-083 (B&K Vibro IN-083 displacement sensor) is a non-contacting eddy-current displacement sensor with integrated oscillator, part of the IN-081/083/084/085 family. It measures relative shaft vibration, relative shaft displacement and rotor speed on a metallic target, preferably 42CrMo4 steel, without a separate driver.

The output voltage is proportional to the gap between probe tip and shaft within a 1.5 mm linear range. Signal cables up to 1000 m can be connected directly, and the sensor can be replaced without recalibration. B&K Vibro does not publish a public decode of every segment of the order code IN-083/3/070/50/0/206, so the configuration is confirmed against the existing installation before quotation.

Key Features

Eddy-current principle with integrated oscillator, no separate driver
Linear displacement measuring range 1.5 mm; sensitivity −8 mV/µm on 42CrMo4
Operating frequency range 0 to 10 kHz (−3 dB)
Meets the essential accuracy requirements of API 670 and DIN 45670
Direct connection of signal cables up to 1000 m
Replaceable without recalibration

Technical Specifications

Parameter	Value
Order code	IN-083/3/070/50/0/206
Measured parameters	Relative shaft vibration, relative shaft displacement, speed
Linear measuring range	1.5 mm (2.4 mm with additional 5% deviation)
Sensitivity	−8 mV/µm (material 42CrMo4)
Sensitivity error	<±5% at +22 °C; <±10% over operating temperature
Frequency range	0 to 10 000 Hz (−3 dB)
Average working gap voltage	−9 V
Supply voltage	−18 to −30 V DC, max. 20 mA
Operating temperature	0 to +110 °C
Storage temperature	−20 to +70 °C (in original packaging)
Thread	M10 × 1
Cable	3-core shielded, open ends
Protection class	IP54
Weight	approx. 120 g
Deviation from reference line	±2 % at +22 °C; ±10 % over operating temperature range
Noise	Below 1 mV peak-to-peak (up to 10 kHz)
Minimum load	Above 1 kΩ
Admissible signal cable length	1000 m
Wire colours	red = -DC, white = COM, yellow = SIG, yellow/black = shield
Thread options for IN-083	M10 × 1 or 3/8 in-24 UNF
Mounting torque	4.5 Nm
Nominal sensitivity in imperial units	-200 mV/mil (reference material AISI 4140)

Applications

Radial shaft vibration and axial position on steam and gas turbines, compressors and pumps
Inputs to machinery protection systems such as VIBROCONTROL racks
Speed and phase reference measurement
Condition monitoring of critical rotating equipment in oil and gas, power and petrochemical plants

B&K Vibro IN-083 Installation and Wiring Notes

The IN-083 has a three-core shielded cable with open ends: red goes to the negative supply (-18 to -30 V DC), white is common and yellow is the signal; the yellow/black lead is the shield, which is not connected to the sensor body. The supply input is not protected against reversed polarity, so check the wiring before power is applied. The signal can be run up to 1000 m to the monitoring electronics.

The probe radiates a high-frequency field, and any conductive metal other than the target inside that field falsifies the reading. The manufacturer shows 14 mm of free space around the tip and to shaft shoulders, 60 mm between sensors mounted in parallel, and minimum shaft diameters of 45 mm for one probe and 60 mm for two probes at 90 degrees.

Fix the sensor to a part of the machine whose own vibration will not distort the measurement and tighten the mounting nut to 4.5 Nm. The average working point is a gap voltage of -9 V.

B&K Vibro IN-083 Selection Notes

The factory calibration of -8 mV/µm applies to 42CrMo4 shaft steel. On other shaft materials the sensitivity changes and the monitor has to be rescaled; the manufacturer gives, for example, -7.90 mV/µm for C45, -7.80 for 30CrNiMo8 and -7.50 for X30Cr13. Within the family, the IN-081 has a 70-250 mm body, the IN-083 a fixed 70 mm body, the IN-084 is a 60 mm right-angle version, and the IN-085 has a socket instead of a fixed cable.

Why Seven Star LLC

Seven Star LLC supplies B&K Vibro displacement sensors and spares to power generation, oil and gas and petrochemical customers across Oman and the GCC. Every segment of the order code, including probe length, cable length and mounting, is checked against the customer’s existing measuring chain before the order is confirmed.

Request a Quote for B&K Vibro IN-083 Eddy-Current Displacement Sensor – IN-083/3/070/50/0/206

Submit a formal inquiry with the full order code IN-083/3/070/50/0/206, the quantity, the target material and the monitoring system the sensor will connect to. Inquiry Form

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About brand

The Brüel & Kjær items on this page are mainly machine vibration monitoring products from Brüel & Kjær Vibro, the company based in Darmstadt, Germany. Its VIBROCONTROL monitors, rack modules and velocity sensors protect turbines, compressors, pumps and fans against damaging vibration.

Seven Star LLC is an independent supplier that sources Brüel & Kjær Vibro monitoring modules, monitors and sensors for plants in Oman and the GCC, mostly as replacements for units already in service.

Brüel & Kjær Vibro product families

The largest group here is rack hardware: SM-610 monitoring modules in many variants (the suffix, as in SM-610-A02 or SM-610-118, fixes the version), the PS-610 power supply module and the CI-620 communication interface. Stand-alone monitors include the VIBROCONTROL 1000, the VC-920 and the VC-868/1, alongside the AMO-622 monitoring system. Sensors include the VS-068 and VS-069 velocity sensors. The manufacturer's present machinery protection platform is the VC-8000. Laboratory accelerometers and sound and vibration analyzers that carry the Brüel & Kjær name are a separate product line, and a few of those instruments are listed here as well; send us the type number if that is what you need.

Where Brüel & Kjær vibration monitoring is used

Typical machines are steam and gas turbines, generators, centrifugal compressors, boiler feed pumps, cooling tower and process fans and gearboxes in power plants, oil and gas facilities, cement works and petrochemical plants. The monitors supply alarm and trip contacts to the plant protection system and measured values to the control room.

Ordering Brüel & Kjær Vibro parts: what we need

Send the complete type designation with its suffix, the order or part number from the label, and the serial number. For monitors add the measuring span, sensor type, supply voltage and output configuration, since many units are configured to order. For sensors give sensitivity, mounting direction, cable length, connector and the hazardous area approval. Photos of the label and of the rack help.

Browse Brüel & Kjær products by category: Vibration, Portable Test & Measurement, Sensors & Transmitters.

Frequently Asked Questions

What is the B&K Vibro IN-083 sensor used for?

The IN-083 is an eddy-current displacement sensor used for non-contact measurement of shaft vibration, axial position and eccentricity on rotating machinery.

What is the measuring range of the IN-083?

The sensor offers a linear measuring range of 1.5 mm, which is standard for shaft vibration monitoring applications.

Does the IN-083 include an oscillator?

Yes, this version includes an integrated oscillator, simplifying installation and reducing the components required in the measurement chain.

What temperature range can the sensor withstand?

The IN-083 operates reliably between 0 C and 110 C, covering typical machine and process environments.

What details should I include in my inquiry for the B&K Vibro IN-083 displacement sensor?

Send the part number, your system details and the required quantity through the RFQ page. Seven Star LLC confirms the exact configuration, the matching accessories and the commercial terms for your project.

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