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Description
The LF Series measures actual volumetric flow rate under controlled pressure conditions — making it the right instrument when you need to verify flow characteristics, not just the presence or absence of a leak. It is widely used for medical tubing, breathable membranes, micro-valves, and any application where a specific flow range defines product acceptability.
How It Works
The test part is pressurized to a stable setpoint. The LF's mass flow sensor then measures the steady-state volumetric flow through (or from) the part. Results are expressed in L/min or sccm. Upper and lower flow limits define the OK/NG window — parts that flow too freely (excess leakage) or too restrictively (blocked path) are both rejected. Unlike pressure decay methods, the LF directly characterizes the flow behavior of the part regardless of internal volume variations.
Key Specifications
| Parameter | Specification |
|---|---|
| Test pressure range | 0 – 1200 kPa |
| Sensor accuracy | 0.1% FS |
| Power supply | AC 220 V ±15%, 50 Hz, 60 W |
| Dimensions | 320 × 284 × 300 mm |
| Weight | 8 kg |
| Display | 7-inch color touchscreen · 4-stage auto test cycle |
| Communication | RS-232/485, USB, Ethernet, PLC I/O |
| Air supply pressure | 0.4 – 0.8 MPa |
| Operating temperature | 0 – 50 °C |
| Cycle time | Configurable; application-dependent (typical production cycle ≤ 20 s) |
| Operating humidity | ≤ 95% RH (non-condensing) |
| Certifications | CE Marked · ISO 9001:2015 · National High-Tech Enterprise |
Model Selection
| Model | Flow range |
|---|---|
| LF-1005 | 0 – 5 L/min |
| LF-1010 | 0 – 10 L/min |
| LF-1020 | 0 – 20 L/min |
| LF-1030 | 0 – 30 L/min |
| LF-1050 | 0 – 50 L/min |
Typical Applications
- Medical IV tubing, catheters, and drug delivery micro-channels
- Automotive in-cabin refrigerator capillary tubes
- Breathable and waterproof membranes (PTFE, Gore-Tex equivalents)
- Copper and aluminum capillary tubes for HVAC and refrigeration
- Micro-valves requiring specific flow resistance characterization
Why LF?
- Direct flow measurement: Not affected by internal volume variability — measures actual flow, not inferred leakage
- Validates both ends of the spec: Catches over-flowing (leaking) and under-flowing (blocked or restricted) parts simultaneously
- 5 range options: Match the sensor to your expected flow window for maximum resolution
- Medical-grade accuracy: Used in ISO 11608-validated catheter and drug packaging test lines
Specify your required flow range and target pass/fail window when requesting a quote. Custom fixtures for tubing and membrane testing are available.
Volume pricing: 2nd unit 10% off · 3rd unit 20% off — contact us for a quote. Fixtures, tooling, and accessories are quoted per project.
Series Demo
Request a Quote
Share your application details and our team will follow up with a tailored quotation.