FIRST
Resolution
Choose the digital resolution required by the controller.
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LINEAR POSITION FEEDBACK · IP68 WATERPROOF
RS485 Modbus RTUDraw-wire Displacement Sensor
Protected linear-position measurement for outdoor, washdown and water-infrastructure applications.
BRT38 draw-wire · 0.5 / 1 m · IP68PRODUCT VIEW
RS485 MODBUS RTUSelect resolution and measuring range.
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Measuring range
Select cable travel in metres; allow installation and overtravel margin.
ENGINEERING MATCH
- Sensor family
- BRT38
- Housing size
- 50 × 50 × 72 mm
- Winding wheel
- Ø100 mm
- Pull force
- 4 N
- Maximum speed
- 1 m/s
- Protection
- IP68 waterproof
- Supply voltage
- 5–24 VDC standard · 9–36 VDC or other voltages customizable
SELECTED CONFIGURATIONRS485 MODBUS RTU / 12BIT / 1M / IP68 WATERPROOFFinal housing, usable travel, cable outlet and controlled drawing are confirmed during engineering review.
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Configured feedback,
ready for integration.
FOSAI matches the selected housing, measurement range and signal requirements with the correct model code, controlled drawing and technical documentation.
ENGINEERING DATA
Engineering specification
Protocol, protection and mechanical range are separated so the customer can see exactly what changes. Final cable exit, pinout and controlled drawing are confirmed before ordering.
Selected output / protocolRS485 Modbus RTU
Catalog output codeR0M
Supply voltage5–24 VDC standard · 9–36 VDC or other voltages customizable
Communication settingModbus RTU · 9,600–115,200 bit/s; 9,600 bit/s default
Wiring documentationProtocol-specific pinout is supplied with the confirmed model, cable exit and connector
Measurement principleSpring-retracted draw-wire linear displacement
Verified measuring ranges0.5 / 0.65 / 1 / 2 / 3 / 4 / 5 / 6 / 7 / 8 / 9 / 10 m, plus a shared 12–15 m 2D drawing option
Absolute resolution10 bit (1,024 positions) or 12 bit (4,096 positions)
LinearityUp to ±0.1% of full scale
RepeatabilityUp to ±0.01% of full scale
Maximum cable speed1 m/s
Measuring cableØ0.8 mm coated stainless-steel rope
Mechanical lifeUp to 5 million reciprocating cycles
Cable exitRT1 side exit or AT1 tail exit; standard lead approximately 1–1.2 m
Operating temperature−40 °C to +85 °C
Protection ratingIP68 waterproof version; supplier test condition up to 1 m water depth
Environmental reviewConfirm the complete housing, rope exit, joints, cable entry, corrosion exposure and mounting orientation
BRT27 · 0.5 / 0.65 m27 × 27 × 57 mm · Ø60 mm winding wheel · 3.5 N pull force
BRT38 · 1 m50 × 50 × 72 mm · Ø100 mm winding wheel · 4 N pull force
BRT38 · 2 m63 × 63 × 72 mm · Ø150 mm winding wheel · 2.5 N pull force
BRT38 · 3 m79 × 79 × 72 mm · Ø200 mm winding wheel · 3 N pull force
BRT38 · 4 / 5 m95 × 95 × 74 mm · Ø250 mm winding wheel · 3.5–4.5 N pull force
BRT38 · 6 / 7 m95 × 95 × 94 mm · Ø225 mm winding wheel · 6–7.5 N pull force
BRT38 · 8 / 9 / 10 m120 × 120 × 112 mm · Ø340 mm winding wheel · 8.5–9 N pull force
BRT38 · 12–15 m130 × 130 × 155 mm · shared 2D dimensions · matching 3D STEP pending
APPLICATION FIT
Where this product fits—and what still needs review.
Applications represented in this range
Compatibility is not established by the product name alone
- Complete model suffix and controller behavior
- Supply, signal, protocol, scaling and pinout
- Shaft or range, flange, connector and installation envelope
- Protection, certification and controlled drawing requirements
TYPICAL APPLICATIONS
Explore the application
See the measurement task, recommended configuration and installation checks for each working environment.
MODEL SELECTION SUPPORT
Send the application.
Receive the right configuration.
Include measurement range, resolution, interface, supply, shaft or mounting dimensions, protection rating and quantity.
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