LEFOO LFM11 Differential Pressure Transmitter
Air differential pressure measurement; see exact range and output options in official model data. This exact model identifier appears in LEFOO’s official download list.
Manufacturer: LEFOO
Manufacturer Technical Data
LEFOO official downloadable datasheet index (find LFM11) →
Consult exact datasheet for range, accuracy, power supply, environmental limits and options. This entry identifies a catalog model, not every option/SKU.
LFM11 air DP and airflow
An air differential-pressure transmitter can measure pressure drop across equipment but does not directly supply volumetric flow without a calibrated flow element or fan/duct correlation. Confirm LFM11’s actual calibrated span and BMS output, then route high/low hoses to the appropriate reference points. Evaluate zero drift, overpressure tolerance and mounting vibration. Do not infer an Ex classification from ordinary HVAC deployment.
LFM11 — model-specific differential-pressure configuration
| Selection parameter | Verified manufacturer evidence |
|---|---|
| Pressure ranges | ±100, ±1,000 or ±10,000 Pa (ordered model). |
| Accuracy and dynamic response | ±1% full scale; selectable 0.5, 1, 2 or 4 s response filtering. |
| Outputs | 4–20 mA, 0–5 V, 0–10 V or RS485 Modbus RTU according to wiring version. |
| Environment | −10 to +60°C working; air and neutral gases; Ø6.2 mm pressure tubing; manufacturer online table prints protection as P54, so verify IP rating on current datasheet. |
| Overload | 5 kPa (LFM116), 10 kPa (LFM110) and 80 kPa (LFM112). |
Engineering note: Do not interchange the 2/3/4/5/6-wire connections. The displayed full-scale range and overpressure rating must match the specific variant.
Official LEFOO model specification · examined 26 October 2026.