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Researcher, ICBAS - Universidade do Porto

WPI provided a very professional, supportive and quick service upon purchasing several pieces of scientific equipment.
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Dual Rate Syringe Pump

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Gemini 88

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Now DISCONTINUED. Ask about the dual LEGATO 110 as an alternative.

This unique pump is really two pumps in one. Each side of the Gemini 88 has its own syringe rack, motor and leadscrew. The pump can infuse simultaneously at different rates, or infuse with one syringe and withdraw with the other. When combined with a valve box it provides continuous delivery.

The Gemini Syringe Pump offers continuous infusion or withdrawal, 24 hours a day, 365 days a year with the accuracy and low flow of a KD Scientific syringe pump.


  • Continuous delivery 24/7
  • RS232 computer interface
  • Daisy chain up to 100 pumps
  • Wide variety of syringes from 0.5ul – 140ml
  • High or low pressure
  • CE certification
  • TTL interface
  • 57 lbs of linear force
  • 12 month warranty



#of Syringes:
Accuracy 0.35%  
Average Linear Force 57 lbs
Communications RS-232, TTL  
Communications Level 2  
Depth English 11.25 in  
Depth Metric 28.6 cm  
Display LED, 5 digit, numeric  
Flow Rate Maximum 106.6 ml/min
Flow Rate Minimum 0.0004 μl/hr  
Height English 6 in.  
Height Metric 15.2 cm
Input Power Connection 36 VDC 1.4 Amps
Motor 2 motors, 1/2 to 1/4 microstepping,  microprocessor controlled, 0.9° step angle  
Motor Stepping 1 1,600 at 1/2 stepping; 3,200 at 1/4 stepping Revolution of  Lead Screw  
Net Weight English 15lb
Net Weight Metric 6.8 kg  
Non Volatile Memory Storage of all settings  
Pusher Travel Rate  Maximum 95.25 mm/min
Pusher Travel Rate  Minimum 0.726699 μm/min  
RS-232 RJ11-4 Connector  
Step Rate Maximum 416.7 μsec/step  
Step Rate Minimum 27.3 sec/step
Step Resolution 0.33 μm/step
Syringe Size Maximum 140 ml
Syringe Size Minimum 0.5 μl
TTL 9-pin connector  
Voltage Range Selectable, 95 to 130 VAC, 60 Hz or 220 to 260 VAC, 50 Hz  
Width English 12.5 in
Width Metric 31.1 cm  




Huang, X. (2014). Evaluation of a polymethylpentene fiber mat formed directly on an anode as a battery separator. Journal of Membrane Science. Retrieved from

Huang, X., Bahroloomi, D., & Xiao, X. (2014). A multilayer composite separator consisting of non-woven mats and ceramic particles for use in lithium ion batteries. Journal of Solid State Electrochemistry. Retrieved from

Huang, Y., Zhang, W., Xie, W., & Tang, D. (2013). Influence of ions on dynamic response of surface plasmon resonance fiber optic sensor. Sensors and Actuators B:  …. Retrieved from

Jin, B., Ko, E., Namkung, W., & Verkman, A. (2013). Microfluidics platform for single-shot dose–response analysis of chloride channel-modulating compounds. Lab on a Chip. Retrieved from




Dual AL1000-220 with sync cable for reciprocating use (continuous flow, push-pull, etc)

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