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Micropump Micro-Annular Gear Pumps

Dispense volumes as small as 0.25 µL
  • Flow rates from 0.003 to 288 µL/min
  • Accuracies within ±1%
  • Pressure capable to 580 psi
With the trend to conserve valuable liquids and the need for high-precision movement of fluid, these pumps are becoming a necessity. Internal technology, similar to that of gear pumps, keeps pulsations to a minimum ensuring smooth, consistent flow necessary in applications such as analytical instruments, fuel cell and micro-reaction technology, biotechnology, and other critical application processes.

Micro-annular gear pumps are rotary pumps that are constructed with an externally toothed internal rotor as well as with an annular tooth external rotor, which bear slightly eccentric to each other. During rotation of the rotors around their offset axis, the pumping chambers simultaneously increase on the induction side and decrease on the delivery side of the pump. A homogeneous flow rate is generated between the kidney-shaped inlet and outlet. The small footprint allows for easy integration into a layout to facilitate the research.

Low-Pressure Models are supplied with DC motors with graphite brushes and are fitted with encoders.

High-Performance Models are provided with actuator equipped with an electronic commutated, brushless DC motor and integrated control unit. Control can be an RS-232 interface using Windows® Motion Manager software (included) or via an analog input signal, supply voltage 12 to 24 VDC.
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Compareitem specifications
Flow Rate (mL/rev) Max Flow Rate (mL/min) Max Pressure (PSI)
Availability Pricing
Micropump L24689 Microannular Gear Pump, 5microliter to 255ml/min, 116 PSI with analog controller EW-73100-00 Mfr # L24689
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288 73
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Micropump L24690 Microannular Gear Pump; 1.2 uL/min to 72 mL/min, 73 psi, Analog EW-73100-02 Mfr # L24690
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72 73
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Micropump L24691 Microannular Gear Pump, 0.3microliter to 18ml/min, 44 PSI with analog controller EW-73100-04 Mfr # L24691
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18 44
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Micropump Microannular Gear Pump, 0.15microliter to 9ml/min, 22 PSI with analog controller EW-73100-06 Mfr # L24692 (H11010103 MZR 2521/H66020300 MZR SK-KG-21)
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9 22
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Micropump L24693 Microannular Gear Pump; 5.0 uL/min to 255 mL/min, 116 psi, Digital EW-73100-10 Mfr # L24693
COMPARE
288 73
Call For Price
Micropump L24694 Microannular Gear Pump; 1.2 uL/min to 72 mL/min, 73 psi, Digital EW-73100-12 Mfr # L24694
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72 73
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Micropump L24695 Microannular Gear Pump, 0.3microliter to 18ml/min, 44 PSI with digital controller EW-73100-14 Mfr # L24695
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18 44
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Micropump L24696 Microannular Gear Pump; 0.15 uL/min to 9 mL/min, 22 psi, Digital EW-73100-16 Mfr # L24696
COMPARE
9 22
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Micropump L24697 Microannular Gear Pump; 5.0 uL/min to 255 mL/min, 1160 psi, Digital EW-73100-50 Mfr # L24697
COMPARE
288 580
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Micropump L24698 Microannular Gear Pump; 1.2 uL/min to 72 mL/min, 435 psi, Digital EW-73100-52 Mfr # L24698
COMPARE
72 435
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Micropump L24699 Microannular Gear Pump; 0.3 uL/min to 18 mL/min, 145 psi, Digital EW-73100-54 Mfr # L24699
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18 145
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