SGM-PR40 is a compact rod-type magnetostrictive position sensor with a cylindrical stainless head. The pressure-resistant tube is rated 35 MPa continuous (70 MPa peak), stroke is 25–4000 mm, protection is IP68, and outputs are 4–20 mA, 0–20 mA, 0–10 V, 0–5 V or RS485 through an M12 connector.
Pressure-resistant outer tube with high protection rating. Measuring range 25-4000mm, analog/RS485 output, 35MPa(continuous) 70MPa(peak). Part number prefix SGM stands for the SEGMENsensor magnetostrictive range; the full ordering code is explained below and in the datasheet.
Updated 2026-09-29 · Values from the SGM-PR40 datasheet, Rev A.
All values from the SGM-PR40 datasheet. Orderable range as listed; longer ranges and special temperature or pressure versions on request.
| Parameter | Value |
|---|---|
| Performance | |
| Measuring range | 25–4000 mm |
| Output signal | 0-20mA(max/min load 0/500Ω) / 4-20mA(max/min load 0/500Ω) / 0-10V(min. load >5KΩ) / RS485(MODBUS RTU) |
| Resolution | 16-bit D/A |
| Repeatability | ±0.005mm |
| Update time | <5ms(depending on range) / 1ms(1m<range<2m) / 2ms(2m<range<3m) / 5ms(3m<range<4m) |
| Operating conditions | |
| Magnet speed | Any |
| Operating temperature | -40~+85℃ |
| Storage temperature | -55~+85℃ |
| Humidity | 90 % PR10, non-condensing |
| Temperature coefficient | <30ppm/℃ |
| Protection class | IP68 |
| Mounting | |
| Mounting orientation | Any |
| Mounting | M18*1.5 or custom |
| Position magnet | Ring magnet or float |
| Electrical | |
| Electrical connection | M12*1 waterproof connector or direct cable |
| Supply voltage | 24VDC (±20%) |
| Current consumption | <60mA(depends on range) |
| Reverse-polarity protection | Max. -30VDC |
| Over-voltage protection | Max. 36VDC |
| Insulation strength | 500VDC |
| Materials | |
| Sensor head | 304 stainless steel |
| Protective tube | 304 stainless steel |
| Mounting flange | 304 stainless steel |
Specifications, wiring, dimension drawings and the complete ordering code on two pages. No registration required.
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| 1 | Power +12V |
| 2 | Power - (GND) |
| 3 | Analog output + |
| 4 | Analog output - |
| 1 | Power +12V |
| 2 | Power - (GND) |
| 3 | RS485-A |
| 4 | RS485-B |
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 |
|---|---|
| Mounting | |
| 18 | M18×1.5 |
| XX | Custom thread |
| Range | |
| 00025–04000 | 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 |
| I2F | 0–20 mA, zero at rod end |
| I2R | 0–20 mA reversed (20–0 mA), zero at head |
| 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) |
| XX | Customer-specified output |
| Connection | |
| K12 | M12 connector |
| C02 … C99 | Direct cable, number = length in m (C02 = 2 m) |
| …X | Suffix X: customer-specified cable |
| Options | |
| (none) | Series standard dead zones |
| Z9 | Customer-specified dead zones |
| SGM-PR40-18-00400-I1F-K12 | 400 mm, 4–20 mA, M12 connector |
| Part number | Best for | Range | Output | Protection |
|---|---|---|---|---|
| SGM-PR10 | Hydraulic cylinder position sensor | 25–8000 mm | 4–20 mA / 0–20 mA / 0–10 V / 0–5 V / RS485 / SSI | IP67 |
| SGM-PE10 | Magnetostrictive linear position sensor | 25–8000 mm | 4–20 mA / 0–20 mA / 0–10 V / 0–5 V / RS485 / SSI | IP67 |
| SGM-PR20 | IP68 magnetostrictive position sensor | 25–7500 mm | 4–20 mA / 0–20 mA / 0–10 V / 0–5 V / RS485 | IP68 |
| SGM-PE20 | Slim linear position sensor | 25–4000 mm | 4–20 mA / 0–10 V / RS485 | IP67 |
| SE-PR30 | Intrinsically safe linear position sensor | 25–4000 mm | 0–5 V / 0.5–4.5 V / RS485 | IP67 IP68 |
| SGM-PF10 | Flat head magnetostrictive sensor | 25–8000 mm | 4–20 mA / 0–20 mA / 0–10 V / 0–5 V / RS485 | IP68 |
| SGM-PF20 | Compact magnetostrictive sensor | 25–4000 mm | 4–20 mA / 0–10 V / 0.5–4.5 V / 0.25–4.75 V | IP68 |
| SGM-PR40 | Compact rod position sensor | 25–4000 mm | 4–20 mA / 0–20 mA / 0–10 V / 0–5 V / RS485 | IP68 |
| SGM-PR50 | Miniature linear position sensor | 25–4000 mm | 4–20 mA / 0–20 mA / 0–10 V / 0–5 V / RS485 | IP68 |
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