Waterproof RS485 Modbus RTU Linear Draw Wire and Cable Displacement Sensor Transducer IP68
$107.00 – $242.00
Key features
- Power-Off Memory: Retains accurate position data even after power loss, eliminating the need for recalibration and ensuring reliable performance.
- Absolute Multi-Turn Capability:Provides precise position information across multiple turns, making it ideal for complex rotational tasks.
- Mechanical Gear Counting: Utilizes durable mechanical gears for counting turns, removing the need for internal batteries and enhancing reliability.
- High Resolution:Achieves up to 17-bit resolution with 0.07° accuracy for precise angle measurement.
- Compact and Rugged Design: With a minimal outer diameter of just 39mm and an IP68 rating, this encoder withstands harsh environments and water exposure.
- Data Interfaces:Equipped with RS485 connections and supports Modbus RTU for seamless data integration and communication.
- Wide Voltage Range: Designed to operate under various voltage conditions and has passed stringent EMC testing for strong anti-interference performance.
- User-Friendly Configuration: Easy parameter settings management through communication protocols and upper computer software, simplifying the setup process.
- Flexible Operation Modes: Supports both query and automatic return modes for real-time position and speed feedback. Programmable features include baud rate, setting position, counting direction, and speed feedback.
- Cost-Effective Performance: Offers a space-saving design with high performance at a competitive price.
- Durable and Reliable: Magnetic sensors ensure durability and accurate performance in challenging conditions.
Measuring range | 0.5m,1m,2m,3m,4m,5m,6m,7m,8m,9m,10m | Interface | RS485 Modbus RTU |
Encoder Technology | Absolute Magnetic Encoder | Power-off memory | Retains position data even after power loss |
Electrical life | > 100000 h | Supply Voltage | 5v~24V |
Baud rate | 9600~115200(default 9600) | Kernel refresh cycle | < 50uS |
Wire material | AISI304 steel with nylon coating | Wire diameter | ø 0.8 mm |
Cable transducer linearity | ±0.5 % FS | Cable transducer repeatability | ±0.3 % FS |
Current consumption | max. 70 mA | Power consumption | max. 0.38 W |
Protection Rating | IP68 | Temperature | -40 °C up to +85 °C |
Connection Type | Male Connect or Cable | Housing material | Aluminum alloy |
Rope breaking force | typ. 330 N | Life cycles (Ta = 25°C) | 500000 cycles |
Pull-out force | 2N~3N | Wire pull-out max speed | 1 m/s |
Drum circumference | See user mannual | Weight approx. | 0.5 kg |
Shock resistance | 50 G, 11 ms, 100 shocks per axis | Vibration resistance | 10 ... 500 Hz, 10g, 2h per axis Axis : X, Y, Z |



Waterproof RS485 Modbus RTU Absolute Rotary Encoder: Single-Turn and Multi-Turn with Power-Off Memory (IP68)
Industry Applications
Ideal for measuring absolute position in various sectors, including automated guided vehicle systems (AGV systems), industrial trucks, commercial vehicles, packaging machines, logistics applications, agricultural and forestry machines, construction and mining equipment, and special or municipal vehicles.
FAQ: How to Calculate Displacement Length
1.Determine Key Values: Find the inner wheel perimeter and the resolution of your purchased sensor. For example, the BRT38-0.5M model has a range of 500mm and a resolution of 4096 pulses per revolution (PPR).
2. Record Position Values: During use, note the position values from the sensor before and after pulling the rope. Let’s call these values X1 (initial position) and X2 (final position).
Method 1:For the BRT38-0.5M sensor (500mm range, 4096 PPR) and a wheel diameter of 100mm, use this formula:
Length = (X2 – X1) * 100 / 4096 mm.
Method 2:Alternatively, using the actual resolution of the BRT38-0.5M, which is 0.0244mm, the formula is:
Length = (X2 – X1) * 0.0244 mm.
This method allows you to easily calculate the displacement length based on your specific sensor model.

Drawing 0.5M&1M (Above)

Drawing 2M (Above)

Drawing 3M (Above)

Drawing 4M&5M (Above)

Drawing 6M&7M (Above)

Drawing 8M~10M (Above)
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