This document introduces the features and applications of SITRANS LU 01 and LU 02 ultrasonic level transmitters. SITRANS LU 01 is a long-range single-point ultrasonic level transmitter for monitoring liquid and solid levels. SITRANS LU 02 is a long-range dual-point level transmitter for monitoring various solid/liquid media. Both transmitters have features such as easy installation, detachable infrared manual operator, and backlit LCD display.
The SITRANS LU 01 is a single‑point long‑range ultrasonic level transmitter for liquids and solids, while the SITRANS LU 02 provides dual‑point measurement. Both devices use patented sound‑intelligent echo processing and can be installed up to 365 m from the sensor. They feature a back‑lit LCD that displays user‑defined engineering units and support RS‑232, RS‑485 or 4‑20 mA current loop communication.
The manual includes product features, technical specifications, ordering information, wiring diagrams and communication options such as SmartLinx and Dolphin Plus. It also lists environmental ratings, power requirements and optional accessories like detachable infrared keypads. This manual is written in Chinese.
| Measurement range | 0.3 – 60 m |
|---|---|
| Measurement points | LU 01: 1 point, LU 02: 2 points |
| Output signal | 4‑20 mA (isolated) |
| Resolution | 0.1 % of range |
| Accuracy | 0.25 % of range or 6 mm (whichever larger) |
| Temperature compensation range | -50 °C to +150 °C |
| Enclosure protection rating | IP65 (wall‑mounted) |
| Weight | 2.7 kg |
| Power supply (AC) | 100/115/200/230 V AC ±15 % 50/60 Hz |
| Power supply (DC) | 18–30 V DC, 25 W |
The devices can measure up to 60 meters.
SITRANS LU 01 supports a single measurement point.
They can be configured for RS‑232, RS‑485, or a 4‑20 mA current loop, and can connect via SmartLinx modules to DCS or PLC systems.
The enclosure is rated IP65 for wall‑mounted installation.