If you are searching for "YSN-300" or "YSN-401", you already know the YanSyn name. You may have a unit running on your floor, a quotation on your desk, or a spare-part list to match. This guide explains what each YanSyn model code means, what the numbers behind the code do and do not tell you, and how to select the correct family for a humidity, oxygen or temperature target.

YanSyn builds three equipment families. Each family controls a different physical variable. Choosing the wrong family is the most expensive mistake in this category, because no control setting can compensate for the wrong physical mechanism.

Why model codes matter more than marketing names

Industrial buyers rarely search by product category. They search by the code printed on the nameplate of the machine in front of them. That search has very high intent: the person is comparing, replacing, expanding or specifying. It is the last step before an enquiry.

The problem is that model codes are compact. They carry a lot of meaning in three letters and a few digits, and that meaning is not always obvious. This article decodes the system so you can move from a code on a nameplate to the correct equipment decision in one step.

Step 1: the three-letter prefix identifies the family

Every YanSyn model code starts with a letter block. That block tells you which physical variable the machine controls. This is the single most important part of the code.

Read that table once and the rest of the code becomes easier. The YSM series removes water vapour from a sealed enclosure. The YSN series displaces air with dry nitrogen. The YSHG series adds controlled heat. Three different mechanisms, three different families.

Step 2: the number identifies the build variant, not the capacity

This is where most buyers go wrong. Codes such as YSN-300, YSN-401, YSN-237 and YSN-288 are searched frequently, and the natural assumption is that the number is the volume in litres. In the YanSyn system the numeric suffix is an internal identifier for a specific build configuration. Two codes with numbers close together can differ in enclosure volume, gas-control package, shelving layout, monitoring hardware or power supply.

So the correct reading is: the prefix tells you the mechanism, the suffix tells you which configuration of that mechanism. To convert a suffix into a volume or an option list, you must check it against the datasheet, the product page or the equipment nameplate.

A practical tip for replacement and expansion projects: photograph the nameplate before you request a quotation. The nameplate carries the exact code, the serial number, the supply voltage and the build date. That single photograph removes most of the back-and-forth in a spare-part or second-unit enquiry.

Step 3: select by the failure mode, not by the datasheet

Once you know the mechanism, selection becomes a question about your product. Ask what actually damages the material you are storing or processing. The answer points to one family.

The YSHG oven deserves one extra note. It is a PID-controlled electric heating blower oven with a working range from ambient to 500 degrees Celsius. Chamber uniformity is within plus or minus 2 degrees Celsius as standard and can be engineered to within plus or minus 1 degree Celsius where the process needs it. Optional configurations include Class 100 clean construction, a nitrogen inert atmosphere, and IoT monitoring. Those options change what the oven can do far more than the model suffix does.

Industry examples: from code to configuration

Semiconductor and PCB assembly

Most enquiries start with moisture sensitivity. Components absorb humidity during storage, and the absorbed water turns to steam in the reflow oven. A YSM dry cabinet holds the humidity below the level defined by the moisture sensitivity classification, and a YSHG oven performs the baking recovery step when floor life has expired. Where bare copper or silver surfaces must stay bright, a YSN cabinet is the correct answer instead. See our detail on IPC/JEDEC J-STD-033D and on MSD baking profiles.

Lithium-ion battery and new energy

Electrode stock, separator material and cell hardware are sensitive to both moisture and oxygen. Specify the dew point you need, then decide whether humidity control alone is sufficient. Our article on moisture and oxidation control in lithium-ion battery manufacturing covers the full line from electrode storage to cell assembly.

Pharmaceutical and medical

Stability studies are governed by the protocol, not by a catalogue. Where a study demands a fixed temperature and a fixed humidity held together for months, the correct answer is a dedicated constant temperature and humidity chamber built to the required condition. Our GMP stability storage guide explains the specification route.

Checklist: what to send with your enquiry

Frequently asked questions

Is YSN-401 a larger cabinet than YSN-300?

Not necessarily. The numeric suffix identifies a build variant, not a volume scale. Two variants with numbers close together can differ in gas-control package, shelving, monitoring hardware or power supply rather than in size. Compare the configuration sheets for both codes before you decide.

Can a YSM dry cabinet replace a YSN nitrogen cabinet?

No. A dry cabinet controls humidity. It does not remove oxygen from the enclosure. If your material oxidises, tarnishes or degrades in the presence of oxygen, you need a nitrogen purge cabinet. The reverse is also true: a nitrogen cabinet is an expensive way to solve a pure moisture problem. Our five-year total cost comparison sets out the trade-off.

Where do I find the model code on my machine?

On the nameplate. On cabinet models it is usually on the side panel or the inner door frame; on ovens it is usually on the side of the control housing. The same code appears on your original quotation and on the conformity documentation. Photograph the plate before you contact us.

What is the temperature range of the YSHG oven?

Ambient to 500 degrees Celsius, with PID control. Standard chamber uniformity is within plus or minus 2 degrees Celsius and can be engineered to within plus or minus 1 degree Celsius. Class 100 clean construction, a nitrogen inert atmosphere and IoT monitoring are available as options.

Can I order a non-standard size or an option package?

Yes. YanSyn builds to order for volume, shelving layout, clean class, inert-gas configuration and monitoring. State the requirement in the enquiry and the configuration will be quoted against your process, not against a catalogue page.

Conclusion

Reading a YanSyn model code takes three steps. First, read the letter prefix: YSM controls humidity, YSN controls oxygen, YSHG controls temperature over time. Second, treat the number as a build-variant identifier and confirm the configuration against the datasheet or the nameplate. Third, choose the family from your actual failure mode rather than from a specification list.

Get those three steps right and the code you searched for turns into the correct piece of equipment on your floor.

Send us your model code or a photograph of your nameplate, together with your target humidity, oxygen or temperature value. Our engineers will confirm the configuration and return a quotation. Request a configuration and quotation.

YanSyn Intelligence (Shanghai) Co., Ltd. · Building 10, No. 568, Xueronghua Road, Pudong New Area, Shanghai, China