LEFOO LFUD105 Ultrasonic Differential Level Meter
Original maker LEFOO LFUD105 Ultrasonic Differential Level Meter. This named model has different physical design/ultrasonic application from sibling LFUD models and must not be conflated across product suffixes.
Manufacturer technical and installation distinctions
| Principle | Two-probe ultrasonic difference in water level upstream/downstream screening |
|---|---|
| Range/blind zone | 0–3 to 25 m; blind zone 0.25–0.8 m |
| Accuracy/resolution | ±0.5% FS; 1mm |
| Outputs | Two 4–20mA + RS485 and 2 relay outputs; four-wire system |
| Environmental | IP65, separated ultrasonic probes ABS/PTFE options; original maker lists 10–70m cable options |
| Original example | LFUD105 0–3m A4MD 0.5% 10 1 (selected maker catalogue sample) |
Original LEFOO Sensor Products catalog, ultrasonic table and photos (page 29 in printed booklet) · Original LEFOO LFUD105 option and ordering table · LEFOO source model directory
Verified manufacturer model existence, distinct specs and original photo location on 23 October 2026. Exact cropped original photo / certificate and all part-number combinations remain open.
LFUD105 — upstream/downstream level difference
LFUD105 uses two ultrasonic level heads to derive an upstream-versus-downstream level difference, for example across a water-treatment screen. The host must distinguish each head’s level signal and the computed difference; incorrect sensor order can invert a fouling alarm. Match each head’s blind zone, cable length and echo conditions before using the differential for equipment control. Relay and RS485 wiring needs the exact supplied four-wire configuration, and no individual head should be mistaken for a stand-alone complete differential system.