SE-LX20 is a flameproof magnetostrictive level transmitter with a rigid stainless rod inserted through a DN25, DN50 or DN100 flange. It measures 200–8000 mm with one float for level or two floats for level plus interface, shows the value on a local display, and outputs 4–20 mA (HART on request), 0–10 V or RS485.
Flange-mounted rigid rod for direct insertion; flameproof housing with local display, for level measurement on automated equipment in hazardous areas such as petroleum and chemical plants, ranges up to 8 m. Where headroom above the tank is limited, choose the SE-LX30 flexible-cable version. Part number prefix SE marks the explosion-proof version; the full ordering code is explained below and in the datasheet.
Updated 2026-09-29 · Values from the SE-LX20 datasheet, Rev A.
All values from the SE-LX20 datasheet. Orderable range as listed; longer ranges and special temperature or pressure versions on request.
| Parameter | Value |
|---|---|
| Product parameters - output types | |
| Analog output | 2-wire 4-20mA+HART (on request) / 4-wire (3-wire) 4-20mA/0-10V |
| Digital output | RS485(MODBUS-RTU) |
| Performance | |
| Measuring range | 200–8000 mm |
| Output signal | 4-20mA(max/min load 0/500Ω) 0-10V(min. load >5KΩ) RS485(MODBUS RTU) |
| Resolution | 1mm、0.1mm |
| Non-linearity | ±1mm |
| Repeatability | ±1mm、±0.1mm |
| Update time | adjustable via damping time setting |
| Operating conditions | |
| Magnet speed | any |
| Measuring rod temperature | -40~+85℃, -40~+250℃ (high-temperature version) |
| Electronic head temperature | -30~+85℃ |
| Storage temperature | -55~+85℃ |
| Humidity | 90% humidity, no frost forming. |
| Temperature coefficient | <30ppm/℃ |
| Protection class | IP67 |
| Mounting | |
| Mounting orientation | Flange mounting, rigid rod insertion |
| Mounting | DN25 / DN50 / DN100 flange or custom |
| Position magnet | single float, double float |
| Electrical | |
| Electrical connection | explosion-proof terminal housing, 3-core terminal / 4-core terminal |
| Supply voltage | 24VDC (+20%) |
| Current consumption | varies with range |
| Reverse-polarity protection | Maximum -30VDC |
| Over-voltage protection | Maximum 36VDC |
| Insulation strength | 500VDC |
| Materials | |
| Sensor head | aluminium alloy |
| Protective tube | 304 stainless steel |
| Mounting flange | 304 stainless steel |
The SE-LX series is flameproof; Ex certification is applied for under the SE-LX series name, certificate details on request.
Specifications, wiring, dimension drawings and the complete ordering code on two pages. No registration required.
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| 1 | 24V power + |
| 2 | 24V power - (GND) |
| 3 | Not connected (NC) |
| 1 | 24V power + |
| 2 | 24V power - (GND) |
| 3 | Analog signal + / 485A |
| 4 | Analog signal - / 485B |
| 1 | Channel 1 power + |
| 2 | Channel 1 power - |
| 3 | Channel 2 power + |
| 4 | Channel 2 power - |
Build the part number field by field. Outputs or options listed in the specifications but not in the ordering code are available on request.
| Code | Meaning |
|---|---|
| Flange | |
| F25 / F50 / F100 | Flange DN25 / DN50 / DN100 |
| FX | Custom flange |
| Range | |
| 00200–08000 | 5 digits in mm, 5 mm steps |
| Output | |
| I1F | 4–20 mA, zero at rod end |
| I1R | 4–20 mA reversed (20–4 mA), zero at head |
| I1D | Two 4–20 mA outputs (two floats) |
| V1F | 0–10 V, zero at rod end |
| V1R | 0–10 V reversed (10–0 V), zero at head |
| V2F | 0–5 V, zero at rod end |
| V2R | 0–5 V reversed (5–0 V), zero at head |
| R4 | RS485 (Modbus RTU) |
| Floats | |
| 1Fdd | 1 float, dd = medium density ×10 (0.8 → 08) |
| 2FddFdd | 2 floats (interface), both densities |
| Options | |
| W2 | 2-wire |
| W4 | 4-wire |
| SE-LX20-F50-03000-I1D-2F08F11-W2 | Rigid rod, DN50, 3000 mm, two floats for interface (density 0.8 / 1.1) |
| Part number | Best for | Range | Output | Protection |
|---|---|---|---|---|
| SGM-LS10 | Magnetostrictive level sensor | 25–8000 mm | 4–20 mA / 0–20 mA / 0–10 V / 0–5 V / RS485 | IP68 |
| SGM-LC10 | Corrosion resistant magnetostrictive level sensor | 25–1000 mm | 4–20 mA / 0–20 mA / 0–10 V / 0–5 V / RS485 | IP68 |
| SE-LX10 | Magnetostrictive transmitter for magnetic level indicator | 200–8000 mm | 4–20 mA / 0–10 V / 0–5 V / RS485 | IP67 |
| SE-LX20 | Explosion proof magnetostrictive level transmitter | 200–8000 mm | 4–20 mA / 0–10 V / 0–5 V / RS485 | IP67 |
| SE-LX30 | Flexible cable magnetostrictive level transmitter | 200–8000 mm | 4–20 mA / 0–10 V / 0–5 V / RS485 | IP67 |
| SGM-LK10 | Small tank magnetostrictive level sensor | 25–4000 mm | 4–20 mA / 0–20 mA / 0–10 V / 0–5 V / RS485 | IP68 |
New to the technology? Read How to choose a liquid level sensor.
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