Level Transmitters
Ultrasonic Level Transmitter
Non-contact ultrasonic level transmitter, ranges up to 20 m, ±0.3% FS, 1 mm resolution, 2-wire 4–20 mA or 4-wire with RS485 Modbus and two relays. IP67.
- Ranges from 2 m to 20 m
- ±0.3% FS precision, 1 mm resolution
- 2-wire loop-powered or 4-wire with relays
- RS485 Modbus RTU (4-wire)
- IP67, ABS/ETFE/PTFE probe
Ultrasonic Level Transmitter specifications
| Measuring range | 0.15–2 m, 0.3–5 m, 0.35–10 m, 0.5–15 m, 0.8–20 m |
|---|---|
| Blind zone | 0.15–0.8 m (depends on range) |
| Measuring precision | ±0.3% FS (standard conditions) |
| Resolution | 1 mm |
| Display | Liquid level, distance and relay status |
| Supply – 2-wire | DC 12–36 V / 22 mA |
| Supply – 3/4-wire | DC 12–36 V / 70 mA or AC 100–240 V / 5 W |
| Analog output | 2-wire: 4–20 mA loop (load < 400 Ω); 4-wire: 4–20 mA, 12-bit (load < 500 Ω) |
| Digital output | RS485 Modbus RTU (3/4-wire) |
| Relay output | 2-channel SPST, 3 A 250 VAC / 5 A 30 VDC (3/4-wire) |
| Transmitter material | ABS |
| Probe material | ABS / ETFE / PTFE |
| Electrical interface | PG11 |
| Process connection | G2" (custom G1 / 2½" NPT) |
| Ambient temperature | −35 to +70 °C |
| Process temperature | −40 to +80 °C |
| Protection | IP67 |
| Process pressure | 0.8–3 bar; altitude < 2000 m |
Ultrasonic level transmitters measure level without touching the liquid, so there is nothing to clog, corrode or foul. They are the go-to choice for sewage sumps, collection tanks, chemical storage and open channels.
The 2-wire version runs on a 4–20 mA loop. The 4-wire version adds RS485 Modbus and two relays for pump start/stop and high/low alarms, so it can run a lift station on its own.
Typical applications
- STP and ETP collection sumps and lift stations
- Overhead and underground water tanks
- Chemical and dosing tanks (ETFE/PTFE probe)
- Open channel and flume level
Send us the application details and we will confirm the right configuration and lead time.
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