Microplate Dispensers

At Redd&Whyte we specialise in developing and manufacturing microplate dispensers and nano dispensers.


Preddator is Redd&Whyte’s leading microplate dispenser offering flexibility, reliability and low running costs. Developed working in close collaboration with leading research laboratories it has an unparalleled set of features and benefits. If you are interested to hear more about Preddator and discuss its suitability for your applications then we want to hear from you.



Microplate dispenser


“The flexibility of the Preddator enables my laboratory to use the instrument for a diverse range of applications. In addition the low volume dispensing capabilities reduce the overall cost of reagents.”

microplate dispenserSee video of customer interview.


More about Microplate Dispensers

What Are Microplate Dispensers?

Microplate dispensers, also sometimes known as Nano dispensers are used by laboratory scientists to transfer controlled volumes of liquids between microplates and vials, in wide-ranging research and industrial settings. Common application areas include drug research and development, pharmacokinetic studies, high throughput screening, cell biology and disease research, genomics and next generation sequencing, crystallography, clinical reference, agriculture and food and beverage testing.

Traditionally, manually-operated pipettes have been used for dispensing liquids, typically in volumes ranging from microlitres to tens of millilitres. However, the increasing miniaturization of microplate assays, driven by the need for higher throughput and faster experimental testing, means today’s standard format microplates have 384,1536 or 3456 wells per plate. Manual dispensing of liquids into such plates is slow and carries considerable risk of error, due to the tiny well size and small volumes involved (ie, nanolitres). Therefore, automated microplate dispensers are required for reliable and accurate liquid handling at these volumes.

Are There Different Types of Microplate Dispensers?

Many types of microplate dispenser are available, with differing technologies, capabilities and functionalities. They can be broadly classed as either single-channel microplate dispensers or multi-channel microplate dispensers, and are available as stand-alone instruments, or as larger robotic workstations that can transport microplates, in addition to liquid handling. The choice of microplate dispenser depends on the user’s liquid handling requirements. The majority of users seek accuracy, precision and repeatability, particularly at low volumes (under 1l); speed, flexibility and minimal reagent waste are also important factors. Depending on the laboratory, integration with other equipment, workflow optimisation and walk-away capabilities may be important considerations.

It is critical that the microplate dispenser can actually handle the user’s reagents. Today’s labs frequently need to dispense stem cells, gels, oils and greases, and reagents containing micro beads, surfactants, and other so-called “difficult to dispense” substances. Such substances are notorious for causing microplate dispensers to block, resulting in expensive down-time, or for being inaccurately dispensed, meaning experimental data are untrustworthy.

Although many microplate dispensers offer high speed and throughput at low volumes, the vast majority do not provide true flexibility, and are unable to handle difficult-to-dispense substances. A new type of microplate dispenser has recently been developed by Redd&Whyte, through collaboration with scientists in leading research laboratories, that has been specifically designed to overcome these hurdles. The award-winning Preddator is the world’s only automated microplate dispenser that can reliably and accurately dispense problematic substances such as oils, detergents, gels, cells, matrices, and other biological materials, with minimal blockages or downtime. The Preddator’s unique solenoid technology ensures precise dispensing of these substances, even at low (under 20 nl) volumes. The Preddator can be used to fill any microtitre plate (up to 3,456 wells), as well as plates with peripheral evaporation wells and reservoirs. Its flexible programming options allow dispensing in almost any pattern, including curves. Its compatibility with all microplate formats and non-SBS labware provides the versatility and flexibility that scientists need to actually achieve their research visions.

Microplate dispenser informationMore about Preddator

Microplate dispensers - about usMore about Redd&Whyte

Microplate dispensers back to topBack to top

Microplate dispenser scientist


Whether you are interested in testing out the Preddator for a new application area, or are struggling to find a microplate dispenser with the capabilities you need, our applications scientist Dr Phil Wells is here to help.