FOREACH 250 μL Ultra-Compact Precision Ceramic Piston Pump for Reaction-Liquid Addition in Compact Analytical Modules, with a PMMA Pump Head
TM-250-PMMA is a 250 μL ultra-compact precision piston pump with a PMMA head for reaction-liquid addition in compact analytical modules. It targets space-constrained OEM analytical modules. The displayed configuration uses 6-40 UNF ports and 2540 full-stroke steps for integration alongside valves and detection components.
Mounting, tubing connections, valves and drive control can be configured for the project. The displayed version uses a PMMA head and ceramic piston; alternative head or piston materials can be assessed against fluid chemistry, seal design and available space, subject to the project drawing.
Typical Applications:
Metered reaction-liquid addition, Analyzer reagent dispensing, Automated sampling and sample dilution, Water-analysis reagent metering
| Volume | 250 μL |
|---|---|
| Displayed pump head material | Poly(methyl methacrylate) (PMMA) |
| Pump head material options | Displayed PMMA; alternative materials subject to project assessment. |
| Piston material options | Displayed ceramic piston; alternative materials subject to project assessment. |
| Fluidic interface | 6-40 UNF |
| Stroke | 12.7 mm |
| Recommended max speed | 600 RPM |
| Motor step angle | 1.8° |
| Lead | 1 mm |
| Full-stroke steps | 2540 Step |
| Accuracy at 100% stroke | Confirm for the selected configuration and working volume |
| Repeatability at 100% stroke | Confirm for the selected configuration and working volume |
| Repeatability at 2% stroke | Confirm for the selected configuration and working volume |
| Backlash | Confirm for the selected configuration and working volume |
| Designed life | Confirm for the selected configuration and working volume |
| Max fluid pressure | Confirm for the selected configuration and working volume |
TM-250-PMMA applications and selection requirements
TM ultra-compact piston pumps can be configured for clinical chemistry, immunoassay, laboratory automation, sample preparation, life science instruments and water or environmental analysis. Depending on the fluidic task, selection may focus on a reagent dispensing pump, sampling pump, sample dilution pump, reaction-liquid dispensing pump, buffer dosing pump or standard-addition pump.
TM-250-PMMA focuses on reaction-liquid addition in compact analytical modules. Select the 250 μL capacity against the working dose. If the total transfer exceeds one stroke, include refill and valve-switching time. The displayed configuration uses a PMMA head and ceramic piston. All wetted materials must be checked against the actual fluid.
Life science instruments: metered reaction-liquid dispensing pump
Small-volume reaction systems add different liquids in sequence. Important requirements include dose error, residual droplets, carryover and space for valves and detection components.
TM-250-PMMA: Capacity, step count and control timing support staged dosing, with valves and outlet geometry matched to the instrument. Droplet retention and carryover must be tested in the complete fluid path. The ultra-compact TM structure and 6-40 UNF ports target restricted installation space. Use the capacity-specific drawing to allow for fittings, tubing bends and service access, then validate dosing performance.
Clinical chemistry and immunoassay: reagent dispensing pump
Analyzers repeatedly add programmed reagent doses to reaction units. Selection depends on consistency at the working dose and coordination between the pump, selector valve and dispensing probe.
TM-250-PMMA: Aspiration and dispense strokes can be coordinated with reagent-routing valves; wetted materials are selected against reagent composition, temperature and cleaning conditions. Select the 250 μL capacity against the working dose. If the total transfer exceeds one stroke, include refill and valve-switching time.
Laboratory automation: sampling and sample dilution pump
Automated sampling and sample preparation require separate control of sample and diluent volumes, together with management of carryover, bubbles and valve timing.
TM-250-PMMA: The pump can be configured with probes, tubing and valves for sampling and dispensing. Dilution-ratio performance also requires validation of sample volume, diluent volume and mixing. Select the 250 μL capacity against the working dose. If the total transfer exceeds one stroke, include refill and valve-switching time.
Water and environmental analysis: reagent metering and standard-addition pump
Small water-analysis modules add defined reagent or standard volumes to measurement cells. Selection depends on the dosing range, fluid chemistry, concentration and maintenance conditions.
TM-250-PMMA: Dose capacity and fluid-path switching can be matched to the measurement sequence. The head, piston, seals and valves must be assessed together; corrosive, particulate or crystallization-prone fluids require specific validation. Select the 250 μL capacity against the working dose. If the total transfer exceeds one stroke, include refill and valve-switching time. The displayed configuration uses a PMMA head and ceramic piston. All wetted materials must be checked against the actual fluid.
Confirm the working conditions
Provide dose volume, allowed error, timing, fluid composition, temperature, back pressure and mounting space. 250 μL divided by 2540 steps gives approximately 0.098425 μL per step as a nominal calculation only. Validate minimum reliable dose, carryover and dripping in the complete fluid path.
Confirm TM accuracy, repeatability, working pressure and life for the selected materials, drive and fluid. Instrument validation also includes valve operation, bubble management, maintenance and cycle timing.
Datasheet not yet available
The datasheet for this product has not been uploaded yet.
Frequently Asked Questions
It focuses on reaction-liquid addition in compact analytical modules. Related selection tasks include metered reaction-liquid addition, analyzer reagent dispensing, automated sampling and sample dilution, water-analysis reagent metering. Select the 250 μL capacity against the working dose. If the total transfer exceeds one stroke, include refill and valve-switching time.
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.