SGM-PF20 is an embedded magnetostrictive position sensor with a Φ48 mm flange that sits inside the cylinder end cap. Pressure tubes of Φ7, Φ10 or Φ14 mm are available (Φ14 up to 70 MPa), the range is 25–4000 mm, and outputs include 4–20 mA, 0–10 V, 0.5–4.5 V and 0.25–4.75 V.
The embedded type is suitable for use in hydraulic cylinders with limited space. Measuring range 25-4000mm, 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-PF20 datasheet, Rev A.
All values from the SGM-PF20 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 |
| 2 | Signal |
| 3 | Ground |
| 4 | Not connected |
| 1 | Not connected |
| 2 | Power |
| 3 | Ground |
| 4 | Signal |
| 1 | Power |
| 2 | Not connected |
| 3 | Ground |
| 4 | Signal |
| red | Power (red) |
| black | Ground (black) |
| yellow | Signal A (yellow) |
| green | Signal B (green) |
| red | Power (red) |
| black | Ground (black) |
| white | Signal (white) |
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 |
|---|---|
| Pressure tube | |
| T07 | Pressure tube Φ7 mm |
| T10 | Pressure tube Φ10 mm |
| T10M | Pressure tube Φ10 mm with M4 end thread |
| T14 | Pressure tube Φ14 mm (max. 70 MPa) |
| 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 |
| V3F | 0.5–4.5 V, zero at rod end |
| V3R | 0.5–4.5 V reversed (4.5–0.5 V) |
| V4F | 0.25–4.75 V |
| V4R | 0.25–4.75 V reversed (4.75–0.25 V) |
| V1F | 0–10 V, zero at rod end |
| V1R | 0–10 V reversed (10–0 V), zero at head |
| Connection | |
| H1nn / H2nn / H3nn | M12 IP69K 4-pin harness, pins 1-3-2 / 2-3-4 / 1-3-4; nn = length in cm (06–25) |
| HTnn | 3 flying leads brown-white-green, nn = length in cm |
| Enn / ETnn | 3-core cable / cable with internal-thread gland, nn = length in dm (E10 = 1 m) |
| Options | |
| (none) | Dead zones 30 + 36.5 mm |
| Z1 | Dead zones 30 + 63.5 mm |
| SGM-PF20-T10-00300-I1F-H106 | Φ10 tube, 300 mm, 4–20 mA, M12 harness 6 cm |
| 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 |
New to the technology? Read How a magnetostrictive position sensor works.
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