The IQS900 204-900-000-011 A1-B21-C1-H10-I0 is a signal conditioner used with TQ-series eddy-current proximity measurement chains for shaft-relative vibration, gap, and position measurement on rotating machinery.
This specific configuration uses the
B21 sensitivity option
C1 without diagnostics
H10 for a 10 m total system length
I0 without the MA130 DIN-rail mounting adaptor.
The IQS900 is part of the Vibro-Meter / Meggitt proximity measurement product family and was developed as the successor to the IQS450 series.
According to the manufacturer's ordering information, IQS900 configurations are selected through these option codes. The A5 option is associated with Ex applications, while C2 identifies the diagnostic version intended for functional-safety applications. Therefore, A1-B21-C1-H10-I0 should not automatically be substituted by another option combination simply because the base PNR is the same.
| Parameter | Specification |
|---|---|
| Product Category | Vibration Monitoring / Signal Conditioner |
| Part Number | 204-900-000-011 |
| Complete Ordering Code | A1-B21-C1-H10-I0 |
| Product Description | Signal Conditioner |
| Application | Eddy-current proximity measurement |
| Configuration | Standard / Non-Ex |
| Sensitivity Option | B21 |
| Measurement Range | 2 mm |
| Diagnostics | C1 – Without diagnostics |
| Total System Length | H10 – 10 m |
| DIN-Rail Adaptor | I0 – Not included |
| Output | Voltage output configuration |
| Typical Frequency Response | DC to 20 kHz |
| Installation | Panel/mounting arrangement; MA130 is optional |
| Country of Origin | Switzerland |
| Shipping | DHL / FedEx / UPS / TNT and other international shipping options |
| Dimension | 15*14*5cm |
| Weight | 0.35kg |
| Warranty | 12 Months |
The IQS900 is an Industrial Automation Part for non-contact displacement and vibration measurement. It forms the electronic conditioning stage of a Vibro-Meter eddy-current proximity measurement chain. The sensor detects the distance between the probe tip and a conductive machine target, while the IQS900 provides the excitation and signal-conditioning functions required to convert the sensor response into a usable electrical output for a monitoring or data-acquisition system.
In a typical installation, the signal path can be represented as:
TQ Proximity Sensor → Extension Cable → IQS900 Signal Conditioner → Monitoring / Data Acquisition System
This allows the measurement chain to be used for parameters such as:
Shaft-relative vibration
Radial shaft movement
Axial position
Shaft displacement
Mechanical gap
Rotor position
Machinery condition monitoring
The IQS900 is therefore not a conventional PLC analog input module. It is a dedicated signal-conditioning component located between the proximity measurement chain and the plant monitoring or acquisition equipment.
B21 Configuration: What Does It Mean?
For the requested A1-B21-C1-H10-I0 version, B21 is particularly important.
The B21 configuration corresponds to:
Sensitivity: 8 mV/µm
Measurement range: 2 mm
The IQS900 family also has alternative sensitivity/range configurations. The official ordering table identifies B21/B22 for the 2 mm range and B23/B24 for the 4 mm range.
Therefore, when replacing an installed IQS900, buyers should compare the complete ordering code, rather than matching only "IQS900" or "204-900-000-011".
C1 vs. C2 Diagnostics
The requested unit is:
C1 – Without diagnostics
The IQS900 family is also available in a diagnostic configuration:
C2 – With diagnostics
The C2 version adds circuitry for detecting and indicating problems within the measurement chain. The manufacturer's documentation identifies the C2 version as the configuration associated with SIL 2 / functional-safety applications.
For this reason:
IQS900 C1 and IQS900 C2 should not be treated as automatically interchangeable in a safety-related installation.
Always check the existing equipment label and project documentation before replacing the conditioner.
H10: 10 m System Length
The requested unit is configured as:
H10 – 10 m total system length
The H option is associated with the total measurement-chain length. Depending on the selected sensor and extension cable arrangement, the complete measurement chain must match the required system length.
Available H configurations in the manufacturer's ordering information include:
H01 – 1 m
H05 – 5 m
H10 – 10 m
The system length is therefore another parameter that should be checked when sourcing a replacement IQS900.
Compatible Sensors and Measurement Chains
The IQS900 is designed for use with Vibro-Meter / Meggitt TQ-series proximity measurement chains.
Relevant product families include:
TQ4xx Series
Examples include:
TQ402
TQ403
TQ412
These sensors operate as part of the corresponding IQS900 proximity measurement system.
TQ9xx Series
The product information for the IQS900 also identifies compatibility with TQ9xx proximity sensors/measurement chains.
Related Extension Cables
Depending on the selected TQ sensor and system configuration, compatible extension cables such as the EA402 / EA403 family may form part of the complete measurement chain.
Products Description
The IQS900 should be powered (energised) using a limited-power, low-voltage power supply such as a sensor power supply output provided by a VM600Mk2/VM600 or VibroSmart® monitoring and/or protection system, a GSI127 galvanic separation unit, or other suitable power supply. In safety-related applications, an IQS900 must be powered using a limited-power, low-voltage power supply with a safe limitation of −30 VDC (nominal), even in the event of a single fault with the power supply.
Ordering number:
| 204-900-000-011 | --A(Environment) | Standard | 1 | |
| Explosive (Ex) | 5 | |||
| --B(Sensitivity) | Measurement range |
|||
| 8 mV/µm | 21 | 2 mm | ||
| 2.5 µA/µm | 22 | |||
| 4 mV/µm | 23 | 4 mm | ||
| 1.25 µA/µm | 24 | |||
| --C(Diagnostics) | Without diagnostics |
1 | ||
| With diagnostics (SIL) |
2 | |||
| --H(Total system length) |
1 m | 01 | ||
| 5 m | 05 | |||
| 10 m | 10 | |||
| --I(Installation) | Without DIN-rail adaptor |
0 | ||
| With DIN-rail adaptor (MA130) |
1 | |||
IQS900 vs. IQS450
One important procurement point is that the IQS900 was developed as a successor to the IQS450 family.
The manufacturer describes the IQS900 as a form, fit, and functional replacement for the IQS45x series, subject to the appropriate configuration and application requirements.
| Item | IQS450 / IQS45x | IQS900 |
|---|---|---|
| Product Type | Signal Conditioner | Signal Conditioner |
| Measurement Principle | Eddy-current proximity | Eddy-current proximity |
| Application | TQ proximity measurement | TQ proximity measurement |
| Replacement Relationship | Previous generation | Successor |
| Configuration Options | Legacy configurations | A/B/C/H/I options |
| Diagnostics | Depends on version | C1 / C2 configurations |
| Current Product Identification | Legacy | IQS900 |
Important: "IQS900 replaces IQS450" does not mean every IQS450 can be replaced by every IQS900. The sensor, sensitivity, measurement range, system length, and installation configuration should be matched.
IQS450
IQS900
Frequently Asked Questions
Can IQS900 replace IQS450?
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The IQS900 was developed as the successor to the IQS45x series and is described by the manufacturer as a form, fit, and functional replacement for the IQS45x, subject to the application and configuration.
Can I replace C1 with C2?
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Not automatically. C2 includes diagnostic functionality and is associated with functional-safety applications. The replacement configuration should match the existing system requirements.
Does this product include a DIN-rail adaptor?
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The configuration on this page ends in I0, meaning the MA130 DIN-rail adaptor is not included.
Can you verify whether this model is suitable for my existing system?
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Yes. Please provide the existing IQS900 label, TQ sensor part number, extension-cable part number, and monitoring-system model. These details allow the complete measurement chain to be checked before ordering.
How do I confirm whether this IQS900 is a direct replacement for my existing unit?
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Check the complete ordering code on the existing product label, including the A, B, C, H, and I configuration codes. For example, the product on this page is 204-900-000-011 A1-B21-C1-H10-I0. You should also verify the connected TQ-series sensor, total system length, measurement range, and whether diagnostics are required. If you send us a clear photo of the existing nameplate, we can help compare the configuration before quotation.
TQ902 TQ912 EA902 and IQS900 Official Data Sheet PDF →