LEFOO LFB — Magnetic Low-Pressure Gauge

A magnetically coupled analogue gauge for low positive, negative or differential pressure ranges, intended for HVAC and cleanroom monitoring.

Technical specifications

Measured pressure	Positive, negative or differential pressure, selected by model
Measuring ranges	Manufacturer list starts at 0–30 Pa and extends to 0–10 kPa, with bidirectional options
Accuracy	Manufacturer quotes ±2% FS at 21 °C for selected ranges; lower-span variants carry different tolerances
Ambient temperature	−7 to +60 °C
Process connections	Side or rear pressure port arrangements
Installation	Multiple mounting configurations; selected range and diaphragm orientation are important

Values refer to LEFOO’s model family and can differ by selected version. Confirm the ordered suffix and current documentation.

Engineering & selection notes

The magnetically coupled mechanism eliminates the standard gear transmission, which can be helpful under vibration. However, choose the LFB scale from the actual room or duct differential pressure; an instrument covering 0–10 kPa is not an appropriate replacement for a sensitive ±30 Pa gauge. Confirm the accuracy grade and connection orientation for the selected range.

Applications & compatibility

Filter differential-pressure indication, cleanroom pressurisation observation, duct static pressure and other low-pressure HVAC diagnostic uses.

Manufacturer & references

Manufacturer: LEFOO — manufacturer profile. AirAlign is independent of LEFOO and does not imply a distribution relationship.

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