LEFOO · DIFFERENTIAL PRESSURE TRANSMITTERS

LEFOO LFT720A / LFT720B Flange Differential Pressure Transmitters

LEFOO LFT720A / LFT720B Flange Differential Pressure Transmitters. Technical family profile based on the original manufacturer’s current model description; options and approvals must be verified against the exact ordered suffix and delivered nameplate.

Original LEFOO source — LEFOO LFT720B original maker double-flange photograph; LFT720A is a different mounting configuration and is not pictured. Not a certified Ex nameplate or exact order code confirmation.

Manufacturer specifications

Variants	LFT720A flange-mounted and LFT720B remote-flange types; manufacturer technical catalog treats as separate configuration families
Technology	Welded flange/diaphragm oil-filled remote process-pressure transfer based on LFT710 sensing principle
Accuracy	Maker current LFT720 website specifies reference accuracy ±0.2% for turndown ≤10, increasing with turndown; original family catalog additionally lists ±0.075% FS for basic chip. Do not conflate reference/process assemblies
Outputs	4–20 mA, 4–20 mA HART, RS485 configurations
Environment	IP65, −20 to +70°C ambient with display
Ex evidence	Maker advertises ExdIICT6; check exact ATEX certificate and flange/fill combination before safety claims

Photo / Ex approval verification: No independently selected and model-matched original manufacturer image has been attached to this AirAlign page. For hazardous area claims, original ATEX/IECEx certificate numbers and scope must be established for the ordered model. General CE/EMC conformity is not an explosion protection approval. Model-level evidence only; SKU and original image QA open.

LFT720A and LFT720B — flange configuration distinction

LFT720A and LFT720B are listed as flange/remote-diaphragm differential-pressure configurations; the manufacturer’s LFT720B photo should not be used as an exact depiction of LFT720A. Identify one- or two-sided remote seals, fill fluid, capillary length and process flange connection before converting hydrostatic pressure into tank level. Differential error includes thermal effects from seals/capillaries and density differences. Output configuration and Ex approvals require order-specific evidence.

Original technical sources

LEFOO manufacturer model and technical specification · Maker technical downloads

Model-family evidence cross-checked 23 October 2026. Do not infer all orderable variants, historical product availability, or Ex certification from one product overview.