LEFOO LFM208 Residual Pressure Transducer

Model-specific datasheet and ordering detail — verified 23 October 2026

LFM208 is a MEMS low-pressure residual/differential air-pressure and smoke-control transducer used for stairwell pressurisation / lift lobby monitoring. Official LEFOO technical sheet specifies a nominal ±100 Pa family measurement range, ±1% FS accuracy at 25°C, 1000 Pa withstand, 24 VDC ±10% supply, IP30, and operation from −10 to +60°C in that original PDF revision. Manufacturer document discrepancy: LEFOO’s current live LFM208 product page lists an operating range of −20 to +75°C (and compensation −5 to +60°C), while the maker-hosted PDF lists −10 to +60°C operation/compensation. The two figures are not reconciled; check the ordered hardware revision and current factory datasheet before specifying ambient limits. Sensor measures air / non-aggressive gas, not fluid process pressure. The product has separate status and alarm LEDs and may be ordered with or without display.

Supplier ordering-guide options: 2530 denotes the 20–30 Pa residual pressure selection, 4050 denotes 40–50 Pa; screen N absent or D present; communications R = RS485 or P = Pb two-bus. The manual contains a partial selection example. These options are set-point / application selections and do not imply every cross-combination is currently sold.

Certificate scope: TÜV SÜD attestation E8A 108521 0004 Rev. 00 names the LFM208 among LFM108/LFM11/LFM3/LFM5 for EU EMC Directive 2014/30/EU, EN 61326-1:2013 (dated 9 April 2021). The attestation applies only to the stated electromagnetic-compatibility requirements and named models.

Original LEFOO LFM208 model photo, ranges and ordering guide (PDF) · Original TÜV SÜD EMC attestation covering LFM208 (not Ex).