Seed Treater Atomizers vs. Spray Nozzles: Why the Difference Matters
If you’re shopping for a seed treater, don’t overlook the part that actually puts treatment on the seed.
There’s a lot to compare when buying seed treating equipment. Box-to-box or bulk? Semi-automated or fully automated? How much capacity do you need? What kind of pump stands, scales, metering system and controls make sense for your operation?
All important questions. But there’s another piece of the seed treater that deserves just as much attention: how the treatment is actually applied to the seed.
Some seed treaters use spray nozzles. Others use a spinning atomizer.
They’re both designed to get liquid treatment onto seed, but they go about it very differently. And when you’re trying to accurately apply seed treatment across hundreds or thousands of units, those differences can matter.
Here’s what growers, seed dealers and seed companies should know about atomizers vs. spray nozzles when comparing seed treaters.
WHAT DOES AN ATOMIZER DO ON A SEED TREATER?
An atomizer is the part of a seed treater responsible for dispersing liquid seed treatment as seed passes through the treating chamber.
On an AT500 box-to-box seed treater, seed first passes over a cone-shaped feature that separates the seed and reduces the density of the falling seed curtain. Below it, a rapidly spinning atomizer disperses treatment outward, allowing chemical to reach the falling seed from multiple angles.
The treated seed then moves into the poly-cupped auger, where the rolling action provides another opportunity to distribute treatment across the seed.
It’s a relatively small component doing a pretty important job.
AN ATOMIZER HELPS PROVIDE MORE COMPLETE SEED TREATMENT COVERAGE
Start with the most obvious question: Is the treatment actually reaching the seed?
With a traditional spray-nozzle system, treatment is sprayed into a moving stream of seed. The problem is that a dense curtain of seed can make it difficult for spray to reach seeds buried toward the center of that flow. Think about spraying water at a waterfall. You can hit the outside, but getting evenly through the entire column is another story.
An atomizer approaches the problem differently.
As seed enters the AT500 treating chamber, a cone helps spread the seed before it reaches the atomizer. The atomizer then rapidly spins and disperses treatment into that falling seed from multiple angles. UAS describes this as providing 360-degree coverage as the seed passes through the chamber.
That matters because good seed treating isn’t simply about using the right product. It’s about getting the right amount of that product onto the seed as consistently as possible.
ATOMIZERS WORK WITH FLOWMETERS FOR MORE PRECISE APPLICATION
Seed treatment can be expensive. Applying too much wastes product and money. Applying too little means you aren’t applying the intended rate. That makes calibration and chemical delivery a big part of any seed treating operation.
Traditional spray-nozzle systems can depend on matching a spray tip with the appropriate pressure. Changes in treatment viscosity and temperature can affect how those systems perform, which makes accurate calibration more complicated.
UAS seed treaters instead pair the atomizer with chemical flowmeters. Once the system is properly calibrated, the flowmeter regulates how much treatment is being delivered to the treater. Current AT500 systems use chemical flowmeters specifically for precise treatment application.
That gives operators another important advantage: You can measure what you're applying instead of simply assuming the spray pattern is right.
For growers or seed dealers treating multiple products, crops or treatment recipes, that kind of control becomes especially valuable.
ATOMIZERS CAN HANDLE DIFFERENT SEED TREATMENT PRODUCTS WITHOUT CHANGING SPRAY TIPS
Not every seed treatment behaves the same way. Different products and treatment combinations can have different viscosities. Temperatures change. Rates change. You may move from one crop or recipe to another.
A nozzle-based system may require operators to account for those differences through spray-tip selection and pressure. With an atomizer and properly calibrated chemical-delivery system, the focus shifts to accurately controlling the flow rate of the treatment being sent to the atomizer.
That can simplify the process when your treating operation uses multiple products or treatment recipes throughout the season. And the more seed you treat, the more those little efficiencies start to matter.
LESS WORRY ABOUT CLOGGED SPRAY NOZZLES
Anyone who has worked with spray equipment knows the drill. A tiny opening plus thick or dried product can equal a plugged nozzle.
Seed treatments can vary in viscosity, and residual product can build up when equipment isn't properly cleaned. This can make spray nozzles susceptible to buildup and clogging.
An atomizer eliminates the need to push the treatment through a small spray tip to create the application pattern. That doesn't mean an atomizer is maintenance-free. Seed treating equipment still needs to be cleaned, inspected and maintained.
But removing spray tips from the equation removes one common potential restriction point. When treating season gets busy, avoiding downtime matters.
CLEANUP IS SIMPLE
Nobody buys a seed treater because they're excited about cleaning it. But cleanup is part of owning one. One useful feature of the AT500 is its slide-out atomizer chamber, which provides easier access when it is time to clean the treating chamber and atomizer.
Keeping the atomizer clean is still important. But easy access makes routine maintenance considerably less of a headache. UAS also provides preventative-maintenance checklists and seed treater troubleshooting resources to help operators keep equipment ready for treating season.
AN ATOMIZER IS ONLY PART OF GOOD SEED COVERAGE
This is an important distinction. An atomizer doesn't work alone. Good seed treatment coverage is the result of the entire system working together:
Accurate seed flow + accurate chemical flow + proper calibration + atomization + mixing = consistent treatment application. On an AT500, seed is dispersed as it enters the atomizer chamber. Treatment is applied by the spinning atomizer. The seed then enters a poly-cupped auger, where it continues rolling and mixing before exiting the treater.
That's why you shouldn't evaluate a seed treater based on one specification. Look at the entire path the seed takes through the machine.
WHAT SHOULD YOU LOOK FOR WHEN BUYING A SEED TREATER?
If you're comparing seed treaters for sale, ask more than how many pounds or bushels the machine can treat per hour.
Ask how it treats them.
Questions worth asking include:
How is seed metered into the treater?
How is liquid treatment measured?
Does the treater use an atomizer or spray nozzles?
How does the machine spread seed before treatment is applied?
What happens to the seed after treatment is applied?
How easy is the system to calibrate?
Can you monitor chemical flow?
How easy is the atomizer or application system to access and clean?
How quickly can you switch between treatments?
What kind of service and troubleshooting support comes with the equipment?
Throughput matters. But accuracy, coverage, control and support matter too.
WHY UAS USES ATOMIZERS ON AT500 SEED TREATERS
The AT500 box-to-box seed treater is designed around a relatively straightforward idea:
Make treating your own seed accurate, efficient and manageable.
Current semi-automated AT500 systems pair chemical flowmeters with a slide-out atomizer and poly-cupped auger. Fully automated systems add touchscreen controls, treatment-recipe storage and automatic pump adjustments while retaining that atomizer-based application system.
For growers, that means the ability to bring seed treatment in-house without necessarily building an entire commercial treating facility.
For seed dealers and seed companies, it provides another option for efficiently treating customers' seed while maintaining control over treatment recipes and application.
And regardless of which type of seed treater you're considering, the way chemistry gets onto the seed should be part of the buying decision.
SHOPPING FOR A SEED TREATER? START WITH THE WHOLE OPERATION.
The best seed treater isn't simply the machine with the longest feature list. It's the system that fits your acres, crops, treatment products, volume, labor, facility and plans for the future. That's where UAS comes in.
We work with growers, seed dealers and seed companies to help determine what type of seed treating equipment makes sense—from box-to-box AT500 treaters and pump stands to larger bulk seed treatment systems. And we don't disappear once the equipment shows up.
We'll help with setup, calibration, training, troubleshooting and the questions that inevitably come once you start treating.
Looking for a seed treater or comparing seed treatment equipment?
Or call 888-402-4787 to talk through your operation with UAS.