FOREACH 500 μL Precision Ceramic Piston Pump for Routine Reagent Transfer, Sample Dilution and Metered Buffer Dispensing, with a PMMA Pump Head
EA-500-PMMA is a 500 μL precision ceramic piston pump with a PMMA pump head for reagent addition in clinical chemistry and immunoassay analyzers, automated sample dilution, buffer dispensing and standard-solution addition in water analyzers. It supports 1/4-28 UNF or M6 ports and 2000 full-stroke steps. Accuracy and repeatability at 100% full stroke are both ≤0.5% under the specified test conditions.
Pump heads can be selected from PMMA, PCTG, PEEK and other project-assessed materials. Piston options include zirconia ceramic, alumina ceramic, PEEK and sapphire. Ports, motor, optical feedback, valves and controller can be configured for fluid compatibility, mounting space and system integration.
Typical Applications:
Reagent dosing, Sample dilution, Reagent metering and standard addition, Buffer and reaction-liquid addition, Automated sampling and solution preparation
| Volume | 500 μL |
|---|---|
| Displayed pump head material | Poly(methyl methacrylate) (PMMA) |
| Pump head material options | PCTG / PMMA / PPS / PVDF / PP / PTFE / PEEK / POM / PSU; Other engineering materials can be assessed for the project. |
| Piston material options | Zirconia ceramic / alumina ceramic / polyether ether ketone (PEEK) / sapphire; the combination is assessed for fluid properties, service-life requirements, installation space and project needs. |
| Fluidic interface | 1/4-28 UNF / M6 |
| Stroke | 12.7 mm |
| Recommended max speed | 600 RPM |
| Motor step angle | 1.8° / 0.9° |
| Lead | 1.27 mm |
| Full-stroke steps | 2000 Step |
| Accuracy at 100% stroke | ≤0.5% |
| Repeatability at 100% stroke | ≤0.5% |
| Accuracy at 2% stroke | ≤2.0% |
| Repeatability at 2% stroke | ≤1.5% |
| Backlash | ≤1.0% |
| Designed life | 5 million cycles |
| Max fluid pressure | <0.30 MPa |
Typical applications of the 500 μL PMMA-head precision piston pump
EA supports metered liquid handling in clinical chemistry, immunoassay, laboratory automation, sample preparation and water or environmental analysis. Project configurations can also be assessed for life science and omics instruments, diagnostic reagent filling and industrial liquid dosing. Tasks include reagent addition, dilution, standard addition, buffer dispensing, reaction-liquid addition, solution preparation, metered washing and priming. Depending on its role, it may be described as a reagent, dilution, standard-addition, dispensing or reagent-filling pump. Titrant addition requires additional minimum-dose validation.
EA-500-PMMA focuses on reagent addition in clinical chemistry and immunoassay analyzers, automated sample dilution, buffer dispensing and standard-solution addition in water analyzers. The 500 μL capacity can be configured for reagent, diluent and buffer handling, with valves coordinating the different dispensing steps. The displayed configuration uses a PMMA head; compatibility must be checked for the head, piston, seals and valves with the actual fluid. The scenarios below connect instrument requirements with configurable capabilities; suitability is subject to application validation.
1. Reagent dispensing pumps for clinical chemistry and immunoassay analyzers
Clinical chemistry and immunoassay analyzers add defined reagent volumes to reaction units. A reagent dispensing pump must support consistent repeated doses and coordinated operation with selector valves, dispensing probes and instrument controls.
EA-500-PMMA: Specified full-stroke accuracy and repeatability are both ≤0.5% under the stated test conditions. Motor, home-position optical sensor and valve options support integration; small-dose performance must be verified using the actual reagent and working volume.
2. Sample dilution pumps for automated sample preparation
Sample-preparation instruments control sample and diluent volumes separately to achieve a programmed dilution ratio. A sample dilution or diluent dosing pump must coordinate repeated aspiration, dispensing, valve switching and between-sample washing.
EA-500-PMMA: 1/4-28 UNF or M6 ports connect to the instrument fluid path, with valves and a controller coordinating aspiration and dispensing. Pump full-stroke specifications are not a guarantee of dilution-ratio accuracy; working volumes, backlash compensation, residual liquid and mixing must also be assessed.
3. Reagent metering and standard-addition pumps for water analyzers
Water and environmental analyzers meter reagents, standards or diluents. A reagent metering or standard-addition pump must control dose volume while matching reagent composition, concentration and cleaning conditions.
EA-500-PMMA: Pump-head, piston and valve materials can be matched to the fluid. The EA specification includes an optional seal-wash arrangement for maintenance planning with crystallization-prone liquids. This option does not establish universal reagent compatibility or replace fluid and cycling tests. The displayed configuration uses a PMMA head; compatibility must be checked for the head, piston, seals and valves with the actual fluid.
4. Buffer dispensing pumps for life science and omics instruments
Sample preparation in life science and omics instruments can require staged buffer, reagent and reaction-liquid addition. Buffer dispensing and reagent pumps must follow programmed doses while coordinating fluid switching and cleaning.
EA-500-PMMA: Wetted-material, valve and control options support the design of a metered addition unit. Omics applications need additional residual-volume, adsorption and carryover validation; cell- or particle-containing samples require separate assessment.
5. Metered dispensing pumps for automated sampling and solution preparation
Automated sampling and solution-preparation equipment delivers reagents, diluents or buffers to selected containers. The dispensing pump must match the dose volume, sequence timing, valves and instrument controls.
EA-500-PMMA: EA supports motor, optical feedback and valve configuration. The specification lists an optional ISC1000 integrated driver with RS-232, RS-485 and CAN interfaces; these are driver capabilities, not interfaces built into the bare pump. Positioning and cycle time depend on the instrument motion system and fluid path.
Application selection guidance
500 μL is the nominal capacity; nominal volume per step is approximately 0.25 μL. Neither is a validated minimum dose. Provide working volume, allowed error, timing, reagent, temperature and back pressure for configuration-specific testing. The specification footnotes describe the 2% stroke figures as displacement tests, not direct measurements of reagent dispensing.
The specified expected life of five million cycles uses pure water at room temperature and 50 kPa back pressure. Saline or crystallization-prone fluids require a maintenance procedure. Pressure, seal wash, feedback and driver options follow the formal specification and project configuration. Omics, titration and filling require further carryover, minimum-dose, dripping or process validation.
Datasheet not yet available
The datasheet for this product has not been uploaded yet.
Frequently Asked Questions
This configuration targets reagent addition in clinical chemistry and immunoassay analyzers, automated sample dilution, buffer dispensing and standard-solution addition in water analyzers. The 500 μL capacity can be configured for reagent, diluent and buffer handling, with valves coordinating the different dispensing steps. Suitability depends on the fluid, working volume and instrument timing.
Piston Pump Configured for Your Instrument
Share the target volume, fluid compatibility, port type, control method, installation space, and service-life requirements. The FOREACH engineering team can help confirm the pump configuration and wetted materials.