BT103S Variable Speed Peristaltic Pump

  • €593,00
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Driven by a high-quality stepper motor, the BT103S peristaltic pump offers a speed range of 0.1 to 100 rpm with a speed accuracy of ±0.2%. It has a single-channel flow rate range of 0.0001 to 480ml/min. The pump is equipped with an RS485 communication interface that is compatible with the Modbus protocol, making it easy to connect to computers, microcontrollers, PLCs, inverters, HMIs, and other external devices for systematic or centralized control.

Functions and Features

  • Membrane keypad operation is convenient and durable.
  • High-quality closed-loop stepper motor drive, accurate speed and smooth operation, allowing for high-precision flow transmission.
  • Basic functions such as forward and reverse, start/stop, full speed, speed regulation, and state memory (power-down memory).
  • Parameters include running time, interval time, number of cycles, etc. to meet the needs of timed dosing, liquid dispensing, and flow testing.
  • The slow stop and anti-drip function can effectively prevent liquid dripping when stopping.
  • Key lock function to prevent misoperation.
  • Streamlined plastic housing, easy to clean.
  • Circuit board with layered paint process for dust and moisture-proof.
  • Excellent anti-interference characteristics, wide voltage range, suitable for complex power supply environment.
  • Various external control signals can be used to control start/stop, forward/reverse rotation, speed adjustment, and optocoupler isolation.
  • RS485 communication, compatible with Modbus protocol, for convenient connection with various control devices.
  • Support blocking and leakage alarm (optional).
  • A thermal printer can be connected for real-time printing of operating parameters (optional).
  • Can be connected with a variety of high-performance pump heads.


  • Flow rate: 0.0001 to 480ml/min
  • Speed range: 0.1 to 100rpm
  • Speed resolution: 0.1rpm
  • Speed Accuracy: ±0.2%
  • Display : monochrome 128x32 dot matrix LCD, 77x32mm
  • Timing function: set running time from 0.1 to 999 seconds/minutes/hours/day, and intermittent time from 0.1 to 999 seconds/minutes/hours/day.
  • Cycle: 0-999 times (0 for infinite cycle)
  • Suction reverse angle: 0-720 degrees
  • External control signal input: (1) start/stop: passive contact, external control input level (5-24V); (2) Forward \ reverse: passive contact, external control input level (5-24V); (3) Speed adjustment: analog 0-5V, 0-10V, 4-20mA (optional)
  • Communication interface: RS485 MODBUS interface
  • Operating condition: Temperature 0-40°C; Relative humidity <80%
  • IP grade: IP31
  • Dimensions (L x W x H): 232 x 140 x 145 mm 
  • Weight: 2.9 kg


Dimensions (mm)



BT103S Compatible Pump Head and Tubing with Flow Parameters

Drive  Pump Head Tubing Size Flow Rate Per Channel*
0.1-100 rpm
(6 rollers, 1 channel)
(6 rollers, 2 channels)
(6 rollers, 4 channels)
ID 0.5mm, Wall 0.92mm 0.0022-2.2 ml/min
ID 1mm, Wall 0.92mm 0.0064-6.4 ml/min
ID 2mm, Wall 0.92mm 0.024-24 ml/min
ID 2.4mm, Wall 0.92mm 0.031-31ml/min
(10 rollers, 1 channel)
(10 rollers, 2 channels)
(10 rollers, 4 channels)
ID 0.5mm, Wall 0.92mm 0.0017-1.7 ml/min
ID 1mm, Wall 0.92mm 0.0049-4.9 ml/min
ID 2mm, Wall 0.92mm 0.018-18 ml/min
ID 2.4mm, Wall 0.92mm 0.021-21 ml/min
(3 rollers, 1 channel)
13# (ID 0.8mm, Wall 1.6mm) 0.005-5.0 ml/min
14# (ID 1.6mm, Wall 1.6mm) 0.02-20 ml/min
19# (ID 2.4mm, Wall 1.6mm) 0.05-50 ml/min
16# (ID 3.2mm,  Wall 1.6mm) 0.08-80 ml/min
25# (ID 4.8mm, Wall 1.6mm) 0.19-190 ml/min
17# (ID 6.4mm,  Wall 1.6mm) 0.3-300 ml/min
18# (ID 7.9mm, Wall 1.6mm) 0.43-427ml/min
(4 rollers, 1 channel)
15# (ID 4.8mm, Wall 2.4mm) 0.18-183 ml/min
24# (ID 6.4mm, Wall 2.4mm) 0.31-310 ml/min
35# (ID 7.9mm, Wall 2.4mm) 0.39-390 ml/min
36# (ID 9.6mm,  Wall 2.4mm) 0.50-500 ml/min

 *The above flow rate data is obtained from tests with pure water at room temperature and pressure and is for reference only. Actual flow rates may vary due to pressure, media characteristics, and other relevant factors.

 Please click here to download the operating manual. 

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