The document introduces the features and characteristics of the SMART series miniature ultrasonic level transmitter, including dimensions, measuring range, beam angle, accuracy, output functions, working temperature, etc. The product is characterized by its low price, small size, and light weight. It is suitable for non-contact level measurement of water, pure water, and chemicals. It can be used for remote level monitoring through 4-20mA DC output signal and relay output.
The SMART series small ultrasonic liquid level transmitter from SGM is a compact, high‑performance device designed for measuring liquid, slurry, and acidic media. It offers low signal noise, small size, lightweight construction, and supports 4‑20 mA DC output as well as RS485 communication. Various models provide IP65 or IP68 protection and measurement ranges from 0.25 m up to 7 m.
The manual provides detailed installation guidelines, wiring diagrams, and configuration settings. It describes power supply options (24 VAC, 115 VAC, 230 VAC, 24 VDC, 12 VDC), operating temperature limits (‑30 °C to 70 °C, short‑term to ‑80 °C), pressure range (0.05‑0.15 MPa), beam angle (6° half‑angle), and accuracy (±0.5%). Communication is via RS485, and the document includes wiring tables for both 4‑20 mA and RS485 interfaces. This manual is written in Chinese.
| Output signal | 4‑20 mA DC |
|---|---|
| Power supply options | 24 VAC 50‑60 Hz, 115 VAC 50‑60 Hz, 230 VAC 50‑60 Hz, 24 VDC, 12 VDC |
| Operating temperature | -30 °C to 70 °C (short‑term to -80 °C) |
| Communication interface | RS485 |
| Beam angle | 6° half‑angle |
| Accuracy | ±0.5 % |
| Pressure range | 0.05‑0.15 MPa |
| Blind zone | 0.25‑0.4 m |
It provides a 4‑20 mA DC signal.
The transmitter communicates via an RS485 interface.
The device operates from –30 °C to 70 °C, with short‑term operation down to –80 °C.