Pump 33 DDS (Dual Drive System) Syringe Pump

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The Harvard Apparatus Pump 33 DDS (Dual Drive System) is a leap forward in syringe pump capability. The Pump 33 DDS has two independent pumping channels controlled by an intuitive touch screen interface. 

Item# Description Pricing
70-3333 Pump 33 DDS (Dual Drive System) Syringe Pump Get a Quote
70-2215 Footswitch (w/ Phono Plug) Get a Quote
70-3340 RS-232 Cable for Pump 33 DDS Get a Quote


When injecting stem cells viability of cells can be a major issue. The injection system and sample vortex holder are held at 18°C. The cell delivery is totally integrated in it operation through the NanoCool’s microprocessor system: power, temperature, injection volumes and flow ramping are all controlled by the NanoCool’s program. Keeping the cells at 18°C instead of 37°C reduces O2consumption by an average of 76%. 

The NanoCool™ Injector is very easy to use with an LCD color touch screen and icon interface. This pump allows you to create, save and run simple to complex Methods without a PC. The Method profiles available on this pump are Constant Rate, Ramp, Stepped, Bolus, Concentration, Gradient (binary or ternary), Pulse and Autofill. Delays can be set using the real and relative time clocks.

The Harvard Apparatus Pump 33 DDS (Dual Drive System) is a leap forward in syringe pump capability.

The Pump 33 DDS has two independent pumping channels controlled by an intuitive touch screen interface. This multi-purpose syringe pump employs advanced syringe mechanisms that include a tight gripping, extremely secure syringe clamp that accommodates syringe sizes 0.5 µl to 60 ml. The Pump 33 DDS offers enhanced flow performance with high accuracy and smooth flow from 1.02 pl/min to 106 ml/min.

This new syringe pump employs a graphical user interface controlled with a large 7” LCD color touch screen for quick and easy syringe pump setup. Syringe tables containing all major syringe manufacturers allow simple selection of any compatible syringe size. Audible Alarms, Adjustable Force and Screen Lock are all features that are available with the touch of the screen.

The bright informative display run screen presents the user with all key dispensing parameters in real time.

Operating Conditions

Three operating conditions are available to accommodate a wide range of setups and experimental protocols.

Independent Condition

Independent Condition allows the Pump 33 DDS to operate as two separate syringe pumps named P1 & P2. P1 is syringe position 1, closest to the touch screen interface and P1 is syringe position 2 and is toward the backside of the unit. Each syringe will operate independently with different syringe types, size, force, target (volume or time) and flow rate settings. This innovative condition allows you to run two different flows at the same time using one instrument.

Reciprocating Condition

In reciprocating condition, both syringe channels move in opposite directions at the same rate using the same syringe size and type. When combined with a valve box, the reciprocating condition can provide the continuous fluidic delivery of a peristaltic pump with the accurate pulse free low flow rates provided by a syringe pump.

Twin Condition

The Twin Condition allows both syringes to operate in the same mode using the exact same syringe type, syringe size, force, target (volume or time) and flow rate settings. The pump also allows the user to combine both flows for higher speed and volume infusion applications.

Advanced Connectivity

The Pump 33 DDS comes standard with USB and RS-232 for PC communication and RS-485 for pump-to-pump communication. An entire suite of ASCII commands is available to control the pump remotely with a PC. The pump contains a footswitch input and digital input/output for each independent pumping channel.


A full range of accessories are compatible with the Pump 33 DDS (Dual Drive System) Syringe Pump including syringes, connectors, tubing and valve boxes.


Accuracy ± 0.25 % 
Linear Force 
(Max, per syringe)

70 lbs (31.75 kg) at 100% Force Setting up to a flow rate of 90 ml/min using up to a 60 ml syringe with a 32.573 mm inner diameter. 50 lbs (22.6 kg) at 100% Force Setting for flow rates 90 ml/min to 106 ml/min using the same size syringe.

Syringe Size:

Two Independent syringe mechanisms (noted as syringe drive P1 & P2)

  Minimum 0.5 µl  (0.103 mm minimum inner diameter)
  Maximum 60 ml  (32.573 mm maximum inner diameter)*
Flow Rate:  
  Minimum 1.02 pl/min (0.5 ul syringe, 0.103 mm inner diameter)
  Maximum 106 ml/min (60 ml syringe, 32.573 mm diameter )
Display  7″ WQVGA TFT Color Display with Touch Screen
Modes of Operation:  
  Twin Condition Both syringes of the same size operate identically (flow rate, direction & volume)
  Independent Condition Both syringes operate independently
  Reciprocating Condition Continuous flow, both syringes of the same size operate identically in opposite directions      
Non-Volatile Memory  Stores all settings
Pump Command Control ASCII Command Set
Real time Clock Yes, with battery backup (battery included and required for real time clock)
  Power Barrel connector, (-) barrel (+) post 2mm X 5mm male plug
  RS-485  IEEE-1394, 6 pos (Pump-to-pump communication only)
  USB  Type B
  RS-232 9 pin D-Sub Connector
  (I/O) TTL 15-pin D-sub connector (one for each axis)
Footswitch Connections Mini phono jack
Drive Motor Two independent stepper motors
Motor Drive Control  MCU controlled  
Step Rate:  
  Minimum  27 sec/µstep  
  Maximum 26 µsec/µstep  
Stall Detection Yes,  independent axis stall detection
Input Power 30 V, 2.0 A
Power Supply  Input 100-240 VAC, 50-60 Hz, Output 30V 2.0 A, 50 Watts 
Dimensions  [L x D x H] 11” x 15” x 8” (28 cm x 39 cm x 21 cm )
Weight  21 lbs (9.09 kg )
Operating Temperature  4°C to 40°C (40°F to 104°F)
Storage Temperature  -10°C to 70°C (14°F to 158°F)
Operating Humidity  80% @ 25° C ambient temperature
Storage Humidity  20% to 80% RH, non-condensing
Classification  Class I
Pollution  Degree 1
Installation  Category II
Regulatory Certifications  CE, ETL (UL & CSA), CB Scheme, EU RoHS, WEEE 
*NOTE: Some larger syringes may be compatible with the Pump 33 DDS. Please contact Technical Support for more information.