Vibro-Meter IQS900 Signal Conditioner

Overview

The Vibro-Meter IQS900 is a compact signal conditioner engineered to process shaft relative vibration and radial gap/position measurements from TQ-series eddy-current proximity sensors, forming a core building block of machinery protection and condition monitoring systems on critical rotating equipment. Manufactured under the Vibro-Meter brand of Meggitt Sensing Systems, the IQS900 converts the raw high-frequency signal from a TQ402 or TQ9xx-series probe into a stable, linearized current or voltage output suitable for direct wiring into a protection rack, PLC, or DCS analog input, replacing the earlier IQS45x generation with improved diagnostics and wider compatibility.

Backed by manufacturer datasheet documentation, Seven Star LLC proudly supplies the genuine Vibro-Meter IQS900 signal conditioner to industrial clients across Oman and the wider GCC, backed by manufacturer documentation, calibration support, and access to matched TQ-series sensors. Turbine and compressor operators in Muscat, Sohar, and Salalah depend on Seven Star LLC to keep their machinery protection loops populated with correctly matched Vibro-Meter hardware.

Measurement Principle

The IQS900 operates on the eddy-current measurement principle inherited from its connected TQ-series proximity probe: the probe tip radiates a high-frequency electromagnetic field that induces eddy currents in a nearby conductive target, such as a rotating shaft, and the resulting energy loss varies with the gap distance between probe tip and target. The IQS900 demodulates this signal, linearizes it against the specific TQ sensor’s calibration curve, and outputs a proportional current in the range of roughly -15.5 to -20.5 mA, or an equivalent voltage output, representing both the static gap (position) and the dynamic vibration component superimposed on it.

Because the measurement is entirely non-contact, the IQS900 and its matched probe avoid any mechanical wear, mass-loading of the shaft, or susceptibility to lubricant contamination that would affect a contacting sensor. The practical consequence for machinery protection engineers is a stable, drift-resistant vibration and position signal spanning DC to 20,000 Hz, suitable for both continuous protection tripping and detailed spectral condition-monitoring analysis without periodic re-zeroing.

Engineering Design of the Vibro-Meter IQS900

Physically, the IQS900 is housed in a compact DIN-rail-mountable enclosure with screw-terminal connectors for power, signal output, and a dedicated coaxial probe input, simplifying panel wiring in protection racks and junction boxes. The unit includes dedicated “Raw”, “Test”, and status terminals that allow technicians to inject a simulated test signal and verify the full measurement chain in-situ, without disturbing the running machine or removing the probe from service, which is a significant advantage during scheduled protection-system verification.

The IQS900 is certified for use in potentially explosive atmospheres and meets SIL 2 (IEC 61508) and Category 1 PL c (ISO 13849) functional safety requirements, along with full compliance to API 670 5th edition for machinery protection systems, making it suitable for direct integration into API 670-compliant protection racks on turbines, compressors, pumps, and fans across oil & gas and power generation facilities.

Key Features

The IQS900 signal conditioner combines precision eddy-current signal processing with the certifications required for critical machinery protection duty. Its key features include:

• Compatible with TQ9xx and TQ4xx-series Vibro-Meter proximity sensors for shaft vibration and gap measurement.
• Wide frequency response from DC to 20,000 Hz, suitable for both static position and dynamic vibration measurement.
• Current output of approximately -15.5 to -20.5 mA for long-distance transmission to protection racks or DCS inputs.
• Dedicated Raw and Test terminals enabling in-situ verification of the full measurement chain without machine shutdown.
• Full compliance with API 670 5th edition for machinery protection systems on critical rotating equipment.
• SIL 2 (IEC 61508) and Category 1 PL c (ISO 13849) functional safety certification.
• ATEX and IECEx certification for installation in potentially explosive atmospheres.
• Compact DIN-rail enclosure simplifying integration into existing protection panels and junction boxes.

Industrial Applications

The Vibro-Meter IQS900 is deployed extensively on gas turbines, steam turbines, centrifugal compressors, and large motor-generator sets across oil & gas processing, LNG facilities, and power generation plants, where continuous shaft vibration and axial position monitoring is mandated for machinery protection and insurance compliance. Its API 670 compliance makes it a standard building block in newly specified protection racks as well as a direct replacement part when upgrading older Vibro-Meter or third-party proximity monitoring loops.

Working closely with plant engineers in the region, Seven Star LLC distributes the IQS900 and matched TQ-series sensors to critical facilities across the Sultanate of Oman and the wider GCC, supporting turbine and compressor operators in the Sohar and Salalah industrial zones as well as Muscat-based power and desalination plants with genuine hardware, correct sensor-to-conditioner matching, and technical guidance during protection-system upgrades or turnarounds.

Technical Specifications

The table below summarizes the core specifications of the Vibro-Meter IQS900 signal conditioner.

Request a Quote for Vibro-Meter IQS900 Signal Conditioner

Turbine and compressor operators across Oman and the GCC can request a formal RFQ for the Vibro-Meter IQS900 directly from Seven Star LLC, with lead time confirmed at quotation to support protection-system upgrades and scheduled turnarounds. Technical datasheets and matched TQ-series sensor recommendations can be arranged through our instrumentation division on request. With fast quotation turnaround and technical support, Seven Star LLC supplies correctly matched hardware with technical support for every IQS900 supplied.

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