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Ring Pump RP-QⅡB/C & RP-QⅢB/C series : Pump head replacement type,
Stepper motor drive

RP-QIIB/C, QIIIB/C Photo
  • A stepper motor drive has been added to the QⅡ/QⅢ series, which are popular for their small size and interchangeable heads. It is possible to handle minute discharge volumes.
  • RP-QⅢ series has useful mounting holes.
  • [QⅡB, QⅡC and QⅡF] or [QⅢB, QⅢC and QⅢF] models have different drive motors, but their appearance and dimensions are the same.
  • A dedicated motor controller is sold separately.
    (RE-C500/C501,  RE-C600,  RE-C602 )
  • An optional driver board for stepper motor control is available.

  • Pump head replacement is a one-time disposable.
  • Models with silicone tubes can be autoclaved at 121°C for 25 minutes, 1 time.
  • The following standard models, except for models that use FKM-70 tubes, can be gamma sterilized with 25 kGy.
  • Models that use FKM-70 tubes have not been confirmed for sterilization.


Catalog download
Catalog combined RP-QⅡB/C and RP-QⅢB/C (PDF)
Catalog combined RP-QⅡF and RP-QⅢF (PDF)
Drawing & Data download
For RP-QⅡB/C/F For RP-QⅢB/C/F
Outline drawing (PDF) Outline drawing (PDF)
3D CAD data (STEP) 3D CAD data (STEP)
2D CAD data (DXF) 2D CAD data (DXF)

Standard model (Spec 1)
Model number ∗1 VM
value
(DC V)		 ∗4
Dis-
charge
rate
(µL/min)		 Tube Wire
length /
∗2
Con-
nector		 Model
number
of
Pump-
head
Mate-
rial		 IDｘOD
(mm)		 Length
(mm)
RP-QⅢB/RP-QⅡB series
Used with Motor controller RE-C600 (without Molex connector)
RP-QⅢBP5S-P06A-DC3VS
RP-QⅡBP5S-P06A-DC3VS		 3.0
(recom-
mended)		 0.06 -
60		 Silicone 0.5 x 1.5 60 50 cm /
Without
Molex
con-
nector		 RK-QⅡ
P5S
RP-QⅢBP5F-P06A-DC3VS
RP-QⅡBP5F-P06A-DC3VS		 0.06 -
60		 PharMed
BPT		 0.5 x 1.5 RK-QⅡ
P5F
RP-QⅢB1.5S-P35A-DC3VS
RP-QⅡB1.5S-P35A-DC3VS		 0.35 -
350		 Silicone 1.5 x 2.5 RK-QⅡ
1.5S
RP-QⅢB1.5R-P35A-DC3VS
RP-QⅡB1.5R-P35A-DC3VS		 0.35 -
350		 FKM-70 ∗5
(Fluorine rubber)		 1.5 x 2.5 RK-QⅡ
1.5R
RP-QⅢB1.5M-P35A-DC3VS
RP-QⅡB1.5M-P35A-DC3VS		 0.35 -
350		 TM-50 ∗6
(Olefin-based)		 1.5 x 2.5 RK-QⅡ
1.5M
RP-QⅢB/RP-QⅡB series
Used with Motor controller RE-C500/C501 and RE-C600 (with Molex connector)
RP-QⅢBP5S-P06C-DC3VS
RP-QⅡBP5S-P06C-DC3VS		 3.0
(recom-
mended)		 0.06 -
60		 Silicone 0.5 x 1.5 60 50 cm /
With
Molex
con-
nector		 RK-QⅡ
P5S
RP-QⅢBP5F-P06C-DC3VS
RP-QⅡBP5F-P06C-DC3VS		 0.06 -
60		 PharMed
BPT		 0.5 x 1.5 RK-QⅡ
P5F
RP-QⅢB1.5S-P35C-DC3VS
RP-QⅡB1.5S-P35C-DC3VS		 0.35 -
350		 Silicone 1.5 x 2.5 RK-QⅡ
1.5S
RP-QⅢBP5S-P06B-DC3VS
RP-QⅡBP5S-P06B-DC3VS		 0.06 -
60		 Silicone 0.5 x 1.5 80 2 m /
With
Molex
con-
nector		 RK-QⅡ
P5S-A
RP-QⅢBP5F-P06B-DC3VS
RP-QⅡBP5F-P06B-DC3VS		 0.06 -
60		 PharMed
BPT		 0.5 x 1.5 RK-QⅡ
P5F-A
RP-QⅢB1.5S-P35B-DC3VS
RP-QⅡB1.5S-P35B-DC3VS		 0.35 -
350		 Silicone 1.5 x 2.5 RK-QⅡ
1.5S-D
RP-QⅢB1.5R-P35C-DC3VS
RP-QⅡB1.5R-P35C-DC3VS		 0.35 -
350		 FKM-70 ∗5
(Fluorine rubber)		 1.5 x 2.5 60 50 cm /
With
Molex
con-
nector		 RK-QⅡ
1.5R
RP-QⅢB1.5M-P35C-DC3VS
RP-QⅡB1.5M-P35C-DC3VS		 0.35 -
350		 TM-50 ∗6
(Olefin-based)		 1.5 x 2.5 RK-QⅡ
1.5M
RP-QⅢB1.5M-P35B-DC3VS
RP-QⅡB1.5M-P35B-DC3VS		 0.35 -
350		 TM-50 ∗6
(Olefin-based)		 1.5 x 2.5 80 2m /
With
Molex
con-
nector		 RK-QⅡ
1.5M-A
RP-QⅢC/RP-QⅡC series
Used with Motor controller RE-C600 (without Molex connector)
RP-QⅢCP5S-P18A-DC3VS
RP-QⅡCP5S-P18A-DC3VS		 3.0
(recom-
mended)		 0.18 -
180		 Silicone 0.5 x 1.5 60 50 cm /
Without
Molex
con-
nector		 RK-QⅡ
P5S
RP-QⅢCP5F-P18A-DC3VS
RP-QⅡCP5F-P18A-DC3VS		 0.18 -
180		 PharMed
BPT		 0.5 x 1.5 RK-QⅡ
P5F
RP-QⅢC1.5S-1P1A-DC3VS
RP-QⅡC1.5S-1P1A-DC3VS		 1.1 -
1,100		 Silicone 1.5 x 2.5 RK-QⅡ
1.5S
RP-QⅢC/RP-QⅡC series
Used with Motor controller RE-C500/C501 and RE-C600 (with Molex connector)
RP-QⅢCP5S-P18C-DC3VS
RP-QⅡCP5S-P18C-DC3VS		 3.0
(recom-
mended)		 0.18 -
180		 Silicone 0.5 x 1.5 60 50 cm /
With
Molex
con-
nector		 RK-QⅡ
P5S
RP-QⅢCP5F-P18C-DC3VS
RP-QⅡCP5F-P18C-DC3VS		 0.18 -
180		 PharMed
BPT		 0.5 x 1.5 RK-QⅡ
P5F
RP-QⅢC1.5S-1P1C-DC3VS
RP-QⅡC1.5S-1P1C-DC3VS		 1.1 -
1,100		 Silicone 1.5 x 2.5 RK-QⅡ
1.5S
RP-QⅢCP5S-P18B-DC3VS
RP-QⅡCP5S-P18B-DC3VS		 0.18 -
180		 Silicone 0.5 x 1.5 80 2 m /
With
Molex
con-
nector		 RK-QⅡ
P5S-A
RP-QⅢCP5F-P18B-DC3VS
RP-QⅡCP5F-P18B-DC3VS		 0.18 -
180		 PharMed
BPT		 0.5 x 1.5 RK-QⅡ
P5F-A
RP-QⅢC1.5S-1P1B-DC3VS
RP-QⅡC1.5S-1P1B-DC3VS		 1.1 -
1,100		 Silicone 1.5 x 2.5 RK-QⅡ
1.5S-D
RP-QⅢF/RP-QⅡF series
Used with dedicated Motor controller : RE-C602 ∗3
RP-QⅢF1.5S-2P6A-DC3.3VS
RP-QⅡF1.5S-2P6A-DC3.3VS		 3.3 2.6 -
2,600		 Silicone 1.5 x 2.5 60 50 cm /
Without
Molex
con-
nector		 RK-QⅡ
1.5S
The best pump for Constant discharge of several tens of μL
RP-QⅢF/RP-QⅡF series / With small diameter tube ∗7
Used with dedicated Motor controller : RE-C602 ∗3
RP-QⅢFP5S-P47A-DC3.3VS
RP-QⅡFP5S-P47A-DC3.3VS		 3.3 0.47 -
470		 Silicone 0.5 x 1.5 60 50 cm /
Without
Molex
con-
nector		 RK-QⅡ
P5S
RP-QⅢFP5F-P47A-DC3.3VS
RP-QⅡFP5F-P47A-DC3.3VS		 0.47 -
470		 PharMed
BPT		 0.5 x 1.5 RK-QⅡ
P5F
RP-QⅢFP5S-P47C-DC3.3VS
RP-QⅡFP5S-P47C-DC3.3VS		 0.47 -
470		 Silicone 0.5 x 1.5 RK-QⅡ
P5S
RP-QⅢFP5F-P47C-DC3.3VS
RP-QⅡFP5F-P47C-DC3.3VS		 0.47 -
470		 PharMed
BPT		 0.5 x 1.5 RK-QⅡ
P5F
RP-QⅢB/RP-QⅡB series
Moto driver board BD202411-Q can be used.
(Coming with JST connector for connecting to the driver board.
RP-QⅢBP5S-P06A-DC24VS
RP-QⅡBP5S-P06A-DC24VS		 24 0.06 ～
60		 Silicone 0.5 x 1.5 60 50 cm /
With
JST con-
nector		 RK-
QⅡP5S
RP-QⅢBP5F-P06A-DC24VS
RP-QⅡBP5F-P06A-DC24VS		 0.06 ～
60		 PharMed
BPT		 0.5 x 1.5 RK-
QⅡP5F
RP-QⅢB1.5S-P35A-DC24VS
RP-QⅡB1.5S-P35A-DC24VS		 0.35 ～
350		 Silicone 1.5 x 2.5 RK-
QⅡ1.5S
RP-QⅢB1.5R-P35A-DC24VS
RP-QⅡB1.5R-P35A-DC24VS		 0.35 ～
350		 FKM-70 ∗5
(Fluorine rubber)		 1.5 x 2.5 RK-
QⅡ1.5R
RP-QⅢB1.5M-P35A-DC24VS
RP-QⅡB1.5M-P35A-DC24VS		 0.35 ～
350		 TM-50 ∗6
(Olefin-based)		 1.5 x 2.5 RK-
QⅡ1.5M
RP-QⅢC/RP-QⅡC series
Moto driver board BD202411-Q can be used.
(Coming with JST connector for connecting to the driver board.
RP-QⅢCP5S-P18A-DC24VS
RP-QⅡCP5S-P18A-DC24VS		 24 0.18 ～
180		 Silicone 0.5 x 1.5 60 50 cm /
With
JST con-
nector		 RK-
QⅡP5S
RP-QⅢCP5F-P18A-DC24VS
RP-QⅡCP5F-P18A-DC24VS		 0.18 ～
180		 PharMed
BPT		 0.5 x 1.5 RK-
QⅡP5F
RP-QⅢC1.5S-1P1A-DC24VS
RP-QⅡC1.5S-1P1A-DC24VS		 1.1 ～
1,100		 Silicone 1.5 x 2.5 RK-
QⅡ1.5S
RP-QⅢF/RP-QⅡF series
Moto driver board BD202411-Q can be used.
(Coming with JST connector for connecting to the driver board.
RP-QⅢF1.5S-2P6A-DC24VS
RP-QⅡF1.5S-2P6A-DC24VS		 24 2.6 ～
2,600		 Silicone 1.5 x 2.5 60 50 cm /
With
JST con-
nector		 RK-
QⅡ1.5S
RP-QⅢFP5S-P47A-DC24VS
RP-QⅡFP5S-P47A-DC24VS		 0.47 ～
470		 Silicone 0.5 x 1.5 RK-
QⅡP5S
RP-QⅢFP5F-P47A-DC24VS
RP-QⅡFP5F-P47A-DC24VS		 0.47 ～
470		 PharMed
BPT		 0.5 x 1.5 RK-
QⅡP5F
∗1. The difference between RP-QⅡxxxx and RP-QⅢxxxx is the presence or absence of holes
to fix the pump. If the xxxx part is the same, other specifications are the same.
(See outline drawing below)
∗2. Connection to certain motor controllers requires a Molex connector (referred to as "Molex
connector"). Connection to the motor driver board requires a JST connector (referred to as
"JST connector").
∗2. The pump with a Molex connector is required for use with the motor controller
RE-C500/C501.
∗2. RE-C600 can be used with or without Molex connector.
∗3. The RP-QⅡF and QⅢF series can only be used with the dedicated motor controller
RE-C602.
∗4. The discharge rate is the value when driving at 1 to 1,000 PPS.
∗5. FKM-70 tubes are fluororubber tubes with excellent chemical and oil resistance.
They can also be used with special solvents.
(In the case of special solvents, prior testing is required.)
∗6. TM-50 is a tube made of an olefin-based material that has low sorption and is also used for
cell culture applications.
∗7. The RP-QⅡF and QⅢF series, which use small diameter tubes, have a discharge volume of
approximately 3.2μL per rotation. By stopping the rotation at a specified number using
a controller, it is an ideal pump for dispensing a fixed amount of several tens of μL.
Outline drawing
RP-Q3B/C Outline drawing
Outline drawing
RP-Q2B/C Outline drawing
Discharge direction
RP-Q3B/C Discharge direction

Lead wire
RP-Q2B/C Lead wire drawing

P-Q characteristic
RP-Q2/Q3 P-Q characteristic *It varies depending on the tube material / size and the motor.



Stepper Motor Controller and Driver Board

This series is driven by a stepper motor.
To operate the stepper motor, a dedicated motor controller or driver board is required.
We offer the following motor controllers and driver board as a separately sold option. Please contact us if needed.
★ To use the driver board, you will need a pump equipped with wiring that includes
a JST connector compatible with the driver board (e.g., RP-QⅡ/Ⅲ***-***-DC24VS).

Motor controller RE-C600    [For RP-QⅡ/QⅢ***-***-DC3VS]

RE-C600 photo
  • Stepper motor controller for RP-HX, RP-TX, RP-QⅡB/C and RP-QⅢB/C series
  • Only one pump can be connected to the RE-C600.
  • Various pump operation sequences can be programmed using a PC connected to the RE-C600.
  • The pump can be stopped at a specified number of revolutions up to 30 revolutions, and a fixed discharge volume can be performed at a specified multiple of the discharge volume per revolution.
    (Discharge volume data for one rotation is attached to the pump)
  • The program data of the operation sequence can be saved in RE-C600 and the pump can be operated without connecting to the PC.
  • Both with and without connector of motor wiring can be used.

    • Detail of RE-C600


Motor controller RE-C500/C501    [For RP-QⅡ/QⅢ***-***-DC3VS]

RE-C500 photo
  • Stepper motor controller for RP-HX, RP-TX, RP-QⅡB/C and RP-QⅢB/C series
  • A PC connected to the RE-C500 can control various pump operations.
  • Control 6 pumps with RE-C500
  • Up to 12 pumps can be controlled individually by adding one RE-C501.
  • Various pump operation sequences can be programmed.
  • The program data of the operation sequence can be saved in RE-C500 and the pump can be operated without connecting to the PC.
  • When connecting multiple pumps, different types of pumps can be mixed.

    • Detail of RE-C500/C501


Motor controller RE-C602    [For RP-QⅡ/QⅢ***-***-DC3.3VS]

RE-C602 photo
  • Stepper motor controller for RP-QⅡF and RP-QⅢF series
  • Only one pump can be connected to the RE-C602.
  • Various pump operation sequences can be programmed using a PC connected to the RE-C602.
  • The pump can be stopped at a specified number of revolutions up to 30 revolutions, and a fixed discharge volume can be performed at a specified multiple of the discharge volume per revolution.
    (Discharge volume data for one rotation is attached to the pump)
  • The program data of the operation sequence can be saved in RE-C602 and the pump can be operated without connecting to the PC.
  • Both with and without connector of motor wiring can be used.

    • Detail of RE-C602


Stepper Motor Driver Board BD202411-Q    [For QⅡ/Ⅲ***-***-DC24VS]

Motor driver board photo
  • A driver board used to connect the motor and power supply, and to control the motor via external control signals.
  • Please prepare your own control device to send the control signals.
  • A DC 24V, 0.5 A power supply is required. Please use a DC power source, such as a DC power supply unit or AC adapter.

    • Click here to view the driver board manual.