CoM4 – Functional and End-of-Line Testing Systems
The test systems of the CoM4 family automate the dynamic and highly precise evaluation of volume and mass flows for air and gases. Through advanced correction algorithms, reference calculations, and decades of expertise in gas physics, CoM4 systems are capable of performing extensive functional tests. This allows geometric characteristics, component behaviors, or complete functional sequences to be mapped and assessed with exceptional detail using gas flow measurement.
The CoM4 flow measurement devices are available in various configurations and housing options — from panel‑mount units to compact 19″ rack modules in IP20, as well as splash‑proof IP54 enclosures. Thanks to their modular architecture, high‑precision sensor technology, and flexibly configurable analysis software, the systems adapt seamlessly to a wide range of test and measurement requirements. The associated flow measurement technology can be assembled from different primary standards and integrated either within the rack module or externally on mounting plates.
Depending on the application, CoM4 systems can be deployed for end‑of‑line or inline testing, ensuring reliable, reproducible, and application‑specific results across laboratory, development, and production environments.
CoM4.Geo
Main Features
- High‑precision determination of geometric properties in non‑visible or inaccessible areas
- Environmental compensation and reference calculations for reproducible results independent of ambient conditions
- LFE‑based flow measurement for maximum stability and sensitivity
- High‑speed data acquisition up to 100 Hz for dynamic test scenarios
- Optional adapters and master parts for determining geometric properties
- Repeatability and geometric resolution < 100nm
- Test temperature 0 to +50°C
- Interfaces: Ethernet TCP/IP
Determination of geometric factors with Laminar Flow Elements
The CoM4.Geo functional test system enables the high‑precision, dynamic measurement of geometric properties in locations that are not optically accessible. The measurement principle requires that the cross‑section to be evaluated represents the smallest constriction within the measurement path, ensuring accurate and reproducible detection of geometric deviations.
The system operates by driving the flow to the sonic velocity limit at the narrowest cross‑section, creating a stable and highly sensitive reference condition. Combined with advanced correction and reference calculations that compensate for ambient conditions, the CoM4.GEO delivers repeatable, environment‑independent measurement results even under varying temperature or pressure.
Flow measurement is performed using one or more Laminar Flow Elements (LFE), providing exceptional stability and resolution. All sensors are supplied fully calibrated, with optional DAkkS‑accredited calibration certificates available. Operation and visualization are handled via an intuitive 4‑inch touch display or the included browser‑based software, with measurement results captured at up to 100 Hz and displayed graphically in real time.
With its combination of precise sensor technology, intelligent evaluation algorithms, and robust measurement design, the CoM4.Geo is ideal for applications requiring the detection and assessment of nanometer‑level geometric variations.
| Property | Scope of Functions |
|---|---|
| Resolution (diameter) | ≤ 100 nm |
| Accuracy (air) | ≤ 0.3 % F.S. |
| Flow range (air) | approx. 2–12 L/min |
| Differential pressure sensor | 0...20 mbar |
| Absolute pressure sensor (operating pressure) |
2.5...4 bar abs. |
| Temperature sensor (operating temperature) |
0...50 °C |
| Humidity sensor (operating humidity) |
0...100% (non-condensing) |
| Supply pressure | min. 6 bar abs. compressed air |
| Media compatibility | Clean, dry, non-condensing,
non-corrosive gases and air. The measuring medium must comply with ISO 8573-1. In addition to a 5 µm filter, an oil/water separator in the compressed air supply is absolutely required. |