Non-Contact Solenoid Valve Microplate Dispenser

What is the Non-Contact Solenoid Valve Microplate Dispenser?

A non-contact solenoid valve microplate dispenser ejects pulsed jets of liquid from pressurized reagent lines, delivering nanoliter to microliter volumes into 384- and 1536-well plates without touching the wells. It is used for fast, low-volume, high-density screening.

Overview

Solenoid valve dispensers pressurize reagent reservoirs and open microvalves for milliseconds, with pulse duration and pressure setting the volume, typically 0.5 microliters to 50 microliters per well. Non-contact delivery avoids cross-contamination and tip consumables, and 8- to 32-channel heads fill a 1536-well plate in under a minute. Accuracy depends on calibration per liquid, viscosity and temperature, with coefficient of variation of roughly 2 to 5 percent at 1 microliter or more. The design suits aqueous reagents and cell suspensions with gentle paths, while solvent compatibility depends on valve materials. Dead volume is small, and optional anti-drip and wash systems prevent clogging. Because delivery is pressure-driven, calibration is required after each change of liquid, pressure or tubing, and bubbles in the line cause errors.

How does it work?

Microplate dispensers move liquid from a reservoir to the wells through tubing and a dispensing head. Peristaltic dispensers squeeze flexible tubing with rollers, delivering volume proportional to pump rotation, and they keep the liquid path disposable. Syringe dispensers use a precision plunger to aspirate and dispense volume with high accuracy. Solenoid valve systems pressurize a reagent line and open a microvalve for a precisely timed pulse, delivering nanoliter to microliter volumes, and piezoelectric systems eject droplets by a voltage-driven pressure wave for non-contact dispensing. Multi-channel heads of 8, 16 or 96 nozzles fill rows, columns or entire plates, and plate carriers move wells beneath the nozzles. Priming, backflush and cleaning cycles prevent carryover, and volume accuracy depends on viscosity, tubing and temperature.

What are the key features?

• Non-contact delivery avoids tips and cross-contamination
• Volumes of 0.5 to 50 microliters per well by pulse time and pressure
• 8- to 32-channel heads fill 1536-well plates in under a minute
• Small dead volume and anti-drip valves reduce reagent loss
• Gentle path options for cell suspensions
• Software calibration routines per liquid

What are the technical specifications?

A typical non-contact solenoid valve microplate dispenser configuration offers dispense volume of 0.5–50 µL/well, precision (CV) of 2–5% (≥ 1 µL), dispensing principle of Pressure-driven solenoid microvalve, channels of 8–32, plate formats of 96-, 384-, 1536-well and fill time (1536-well) of < 60 s. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Non-Contact Solenoid Valve Microplate Dispenser is used in 1536-well high-throughput screening, cell seeding in high-density plates, low-volume reagent and substrate addition, assay miniaturization and reporter gene assay plates. Across the wider Microplate Dispensers class, laboratories also deploy it for ELISA reagent and substrate addition, cell seeding and media addition and high-throughput screening reagent dispensing.

Which standards and certifications apply?

Relevant standards and methods include ISO 8655 (piston-operated volumetric apparatus, gravimetric method), ANSI/SLAS 1-2004 to 4-2004, IEC 61010-1, IEC 61010-2-081 and IEC 61326-1. Certification candidates for this model are CE, ISO 9001 manufacturing and RoHS; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Prime every line before use and flush with water or an appropriate solvent after each run to prevent crystallization and cross-contamination. Verify dispensed volume gravimetrically or photometrically with dye at installation and at least annually, across all channels and at your working volumes. Replace peristaltic tubing according to its life, typically after a set number of hours, because wear changes volume. Avoid air bubbles by degassing liquids and checking connections. Use tubing rated for your reagents, and follow biosafety rules when dispensing infectious materials. Keep a log of maintenance and calibration for quality records.

How do I select the right Non-Contact Solenoid Valve Microplate Dispenser?

Choose this variant for fast, tip-free low-volume dispensing in high-density plates. Peristaltic or syringe models are simpler for 96-well work. In an RFQ specify volume range, plate formats, liquids including solvents or cells, channels, calibration requirements and integration with automation.

How does it compare with other Microplate Dispensers variants?

Choose a dispenser by dispensed volume range, accuracy, liquids and throughput. Peristaltic models are economical and simple for buffers and substrates at 5 to 2,000 microliters, while syringe models give better accuracy for varied reagents. Non-contact valve or piezo systems suit nanoliter volumes and 1536-well plates. For cell suspensions, select gentle, low-shear paths with mixing to keep cells suspended. Compare coefficient of variation at your typical volume, dead volume and cleaning procedure, because expensive reagents are lost in tubing. Check plate formats, number of channels, reagent bottles and whether the system integrates into an automation line. Confirm chemical compatibility of tubing and seals with solvents such as DMSO or ethanol.