Per Revolution
M0 and M1 heads cover microliter dispensing volumes.
Microliter Metering Pump
M-Series Microliter Valveless Metering Pump
Ultra-low-volume electronic dispensing for precise automation
The Zaxis M-Series is a microliter valveless metering pump for ultra-low-volume metering and dispensing. The M0 head dispenses 2.5–50 µL per revolution, while the M1 head dispenses 2.5–100 µL per revolution; both support metering below 100 mL/min for controlled small-volume fluid delivery.
M-Series heads use low-flow, low-dead-volume ¼-28 female ports. The pump body is PVDF (Kynar®), and the wetted path can be configured with Kynar®, PTFE and Rulon® AR. Selecting the piston size closest to the maximum required volume supports the best accuracy and precision for the application.
The eVmP Micro is a stepper-motor drive designed for Micro Series pump heads. It is intended for neat chemistry with flow rates below 100 mL/min and pressure below 100 PSIG. Standard connections include RS485, PLC I/O and Ethernet, supporting a dispensing pump within an automated fluid-handling system.
M-Series heads are specified at ±1% full-scale accuracy and 0.5% full-scale CV repeatability. The drive supports continuous metering, single or multiple dispense, flow dispense, flow direction and suck back, with up to 50 stored programs. Zaxis is a USA-owned and operated maker of electronic valveless metering pumps with more than 25 years of experience.
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Why Choose the M-Series Microliter Metering Pump?
The M-Series combines microliter-scale dispensing with the eVmP valveless approach for applications that need a controlled low-volume fluid path. Its M0 and M1 head options, configurable wetted path and electronic drive give engineers a practical starting point for matching a pump to a maximum dispense volume.
The M-Series is intended for ultra-low-volume work rather than a broad, high-flow duty. Low-flow, low-dead-volume ¼-28 female ports are standard, while Kynar®, PTFE and Rulon® AR can be selected in the wetted path. The M0 and M1 head choice lets the dispensing volume be aligned to the job; Zaxis recommends selecting the piston size closest to the maximum volume for the best accuracy and precision.
Per Revolution
Flow Rate
Specified for low-flow metering and dispensing.
Accuracy
Head accuracy specification.
Repeatability
Head coefficient-of-variation specification.
Stored Programs
Drive program capacity.
M-Series Metering Pump Benefits
The M-Series pairs a Micro Series head with the eVmP Micro stepper drive for low-volume dispensing applications. The available operating modes and communications help keep setup, repeated dispensing and integration in one electronic metering platform.
- ✓Dispenses 2.5 µL to 100 µL per revolution with M0 or M1 heads.
- ✓Meters at flow rates below 100 mL/min for ultra-low-volume applications.
- ✓Uses standard low-flow, low-dead-volume ¼-28 female ports.
- ✓Offers a PVDF (Kynar®) pump body and configurable Kynar®, PTFE and Rulon® AR wetted-path materials.
- ✓Provides ±1% full-scale accuracy and 0.5% full-scale CV repeatability.
- ✓Supports continuous metering, single or multiple dispense, flow dispense, flow direction and suck back.
- ✓Stores up to 50 programs on the Micro drive.
- ✓Includes RS485, PLC I/O and Ethernet connections as standard.
- ✓Uses 24 VDC, 2 Amp system power and supports up to 100 PSIG maximum pressure.
How the M-Series Microliter Metering Pump Dispenses
The eVmP family uses a patented valveless design and digitally controlled system-wide volumetric adjustments. For an M-Series dispense cycle, the piston handles the fluid movement while the selected electronic program determines the requested operation.
Aspirate
The piston draws fluid into the microliter pump head through the inlet path.
Rotate / Seal
The piston’s rotation seals the inlet, preparing the metering path for the programmed dispense.
Dispense
The piston dispenses the selected small volume through the outlet path; M0 and M1 heads cover 2.5 µL to 100 µL per revolution.
Repeat
The drive continues metering or repeats a single, multiple or flow-dispense program, with flow direction and suck-back operating modes available.
See the eVmP Smart Pump Interface Overview video tutorial for an introduction to the electronic interface. Interface options are shared across the eVMP pump family; the precise internal cycle wording beyond this generic description requires owner confirmation.
Where the M-Series Is Used
The M-Series is aimed at ultra-low-volume metering and dispensing in automated fluid handling. Its 2.5 µL to 100 µL per-revolution range, low-flow operation and configurable wetted path make it relevant wherever a process needs controlled microliter delivery.
Diagnostics reagent dispensing
Microliter dispensing can support reagent-handling workflows; review the diagnostic reagent manufacturing resource for application context.
Read more →Buffer dispensing
Low-volume dispensing is relevant to buffer workflows described in the buffer-dispensing resource.
Read more →Pharmaceutical manufacturing
Electronic valveless metering can be evaluated for pharmaceutical manufacturing fluid-handling applications.
Read more →Chemical metering
The Micro drive is intended for neat chemistry at low flow and pressure.
Read more →Analytical instruments and OEM equipment
M-Series head and drive options can be evaluated for OEM fluid-metering systems that need microliter delivery.
Read more →Electronics fluid metering
Low-volume electronic metering can be considered for electronics-related fluid-metering applications.
Read more →Technical Specifications
These M-Series head and Micro drive specifications define the microliter platform. Head choice, piston size and wetted-path configuration should be matched to the maximum dispense volume and fluid-handling requirement. Drive speed is dependent on viscosity, so flow and pressure guidance should be considered with the application. These limits are useful for initial sizing, while the final configuration should match the actual fluid, dispense volume, process timing and connection requirements.
- Compatible Drive
- VMP-OEM-M
- Wetted Path
- Ceramic (medical grade alumina-oxide), PVDF, Customization available
- Operational Temps
- -20˚C – 70˚C, non-condensing
- Accuracy & Repeatability
- +/- 1% Full Scale Accuracy, 0.5% Full Scale CV (coefficient of variation)
- Drive Dimensions
- 2.8″ wide, 4″ high, 5.7″ deep
- Compatible Heads
- M0 (3/16″), M1 (1/4″)
- Weight
- 5lbs (with pump head)
- System Power
- 24VDC 2Amps
- Pressure Range
- 100PSIG Max
- RPM
- 1000 (speed dependent on viscosity)
- Operational Types
- Continuous Metering, Single/Multiple Dispense, Flow Dispense, Flow Direction & Suck Back
- Stored Programs
- Up to 50
- Interface
- RS485, 1/2 or Full Duplex, Optional EtherNet/IP
Compare the
eVmP Range
The eVmP range spans different dispensing volumes and drive configurations. Choose the M-Series when the application needs ultra-low-volume metering below 100 mL/min and a 2.5 µL to 100 µL per-revolution M0 or M1 head. Evaluate the V-Series when a larger milliliter range is required, and confirm the final head, piston, fluid path and drive choice with Zaxis.
| Specification |  M-Series |  V-Series |  VS10-Series |  eVmP1 Benchtop |  eVmP2 Dual |
|---|---|---|---|---|---|
| Format | Pump head + OEM drive | Pump head + OEM drive | Pump head + servo drive | Benchtop enclosure, 7″ touchscreen | Dual enclosure, two pumps |
| Volume per revolution / stroke | 2.5–100 µL | 25 µL–1.28 mL | Nearly 10 mL per stroke | Up to 1.28 mL (installed head) | Up to 1.28 mL (installed heads) |
| Maximum flow | Under 100 mL/min | Up to 1,920 mL/min (VS drive) | Up to 6 L/min (10 mL/rev @ 600 RPM) | Up to 900 mL/min | Up to 1,920 mL/min (VS-Series) |
| Maximum pressure | 100 PSIG | 100 PSIG (V) / 200 PSIG (VS) | 100 PSIG | 0–100 psi | 100 PSIG (M/V) / 200 PSIG (VS) |
| Accuracy / repeatability | ±1% FS / 0.5% CV | ±1% FS / 0.5% CV | ±1% FS / 0.5% CV | ±1% FS / 0.5% CV | ±1% FS / 0.5% CV |
| Wetted path | Ceramic, PVDF (Kynar®), PTFE, Rulon® AR | Ceramic, 316SS | Ceramic, 316SS, PTFE; sanitary fittings | Ceramic, 316SS, 303/304SS, PVDF, PEEK | Ceramic, 316SS, 303/304SS, PVDF, PEEK |
| Drive | Stepper (VMP-OEM-M) | Stepper (VMP-OEM-V) or servo (VMP-OEM-VS) | Servo (VMP-OEM-VS10) | M/V stepper or servo drive | Two stepper drives |
| Interface | RS485, PLC I/O, optional EtherNet/IP | RS485, PLC I/O, optional EtherNet/IP | RS485, PLC I/O, optional EtherNet/IP | RS485, 24 VDC I/O, optional EtherNet/IP | Ethernet TCP/IP, RS485 |
| Stored programs | Up to 50 | Up to 50 | Up to 50 | Up to 50 per drive | Up to 50 |
Industries We Serve
M-Series microliter metering pumps can be evaluated across fluid-metering applications where low-volume delivery, electronic operation and a configurable wetted path are relevant. The application, fluid, required volume and operating conditions determine the appropriate configuration.
ElectronicsAccurate fluid metering for electronic manufacturing processes.
EnvironmentalRepeatable dosing for environmental monitoring and treatment.
MedicalPrecision dispensing for medical manufacturing applications.OEMConfigurable metering pumps for OEM equipment.Pharmaceutical ManufacturingReliable fluid control for pharmaceutical production.Positive Displacement PumpsPrecision metering solutions for fluid-control applications.M-Series Microliter Metering Pump FAQ
What dispense volume does the M-Series cover?
M0 and M1 heads dispense from 2.5 µL to 100 µL per revolution.
What flow rate is the M-Series intended for?
The M-Series is intended for ultra-low-volume metering and dispensing below 100 mL/min.
What materials can be used in the wetted path?
The pump body is PVDF (Kynar®). The wetted path can be configured with Kynar®, PTFE and Rulon® AR, or with medical-grade alumina-oxide ceramic and PVDF; customization is available.
What is the M-Series accuracy and repeatability?
The microliter head is specified at ±1% full-scale accuracy and 0.5% full-scale CV, or coefficient of variation.
Which drive is used with M-Series heads?
The VMP-OEM-M (eVmP Micro) stepper-motor drive is designed for M-Series pump heads.
What operating modes are available?
The drive supports continuous metering, single or multiple dispense, flow dispense, flow direction and suck back. Up to 50 stored programs allow repeatable operating setups.
What interfaces are available?
The VMP-OEM-M drive provides RS485 (half or full duplex) and PLC I/O as standard, with optional EtherNet/IP.
How should a piston size be selected?
Select the piston size closest to the maximum required volume for the best accuracy and precision.
M-Series Resources
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