Low humidity control dry cabinets

Description

<1%RH Low humidity control dry cabinets are primarily designed for electronic components classified under high moisture sensitivity levels (MSL)—specifically Levels 4, 5, 5a, and 6. These ultra-low humidity storage cabinets are capable of consistently maintaining an <1%RH storage environment, thereby complying with the international industry standard IPC/JEDEC J-STD-033. 

 Low humidity control dry cabinets: Specification

Low humidity control dry cabinets: Feature

▸Relative Humidity: <1%RH, offering an ultra-low humidity storage solution for MSL 4, 5, 5a, and 6.

▸Digital Display: Microcomputer-controlled LED HD display, user-friendly RH setting, real-time monitoring.

▸ESD-safe: Surface anti-static resistance 10⁵–10⁹ Ω.

▸Adjustable Shelves: Height adjustable, catering to different size components.

▸Memory Function: No need resetting after a power outage.

▸Energy Efficient: Power-saving, while maintaining highly effective humidity control.

How to dehumidify?

The dehumidifying principle of a <1%RH Low humidity control dry cabinets is "physical adsorption via molecular sieves + cyclic regeneration" (the most reliable method), the normal TE cooling dry cabinet can't reach such an ultra-low humidity level.

Adsorption Process: Molecular sieves are utilized as the adsorbent material in the cabinet; these sieves feature a vast network of nanoscale micropores which adsorb water molecules from the air—much like a sponge absorbing water. A fan draws humid air into the dry units, where water molecules undergo physical adsorption, and the dried air is subsequently returned to the interior of the cabinet.

Regeneration Process: Once the molecular sieve reaches adsorption saturation, the system automatically initiates low-temperature heating gently to convert the adsorbed water molecules into water vapor, which is then expelled from the cabinet; the molecular sieve thereby restores its moisture-absorbing capacity.

<1%RH Low humidity control dry cabinets adopt advanced technology, including Switzerland-imported Relative Humidity (RH) and temperature sensors, to ensure precise control and monitoring of the internal environment, the humidity sensor accuracy is +/-2%RH. By maintaining a stable, low-humidity environment, dry cabinets effectively protect sensitive items from the damaging effects of moisture, such as corrosion, mold, and degradation.

Low humidity control dry cabinets in SMT assembly

In the SMT (Surface Mount Technology) industry, the primary application of <1%RH dry cabinets is the specialized management and control of Moisture Sensitive Devices (MSDs), ensuring they remain absolutely dry prior to reflow soldering, thereby preventing component damage caused by the "popcorn effect."

Floor Life refers to the maximum allowable time that an MSD (Moisture-Sensitive Device) can remain in a standard factory environment (≤30°C / 60% RH), after being removed from its moisture-barrier vacuum bag, while still remaining safe for placement and reflow soldering.

Application Method: Once MSL Level 4–6 components have been removed from their vacuum bags, if the mounting and reflow soldering processes are not completed within the specified floor life, they must be immediately placed into a <1% RH dry storage cabinet. In this ultra-low humidity environment of <1% RH, the components' moisture absorption process is effectively "paused," and the remaining floor life ceases to be consumed, the dry cabinet realizes no pre-baking, which can be directly loaded onto the line for use, thereby significantly boosting production efficiency.

Realtime humidity profile (Ambient humidity 60%RH, no load):

Opening the door for 30 seconds each time, then close:

Long-term storage without opening the door:

Realtime humidity measuring before shipping

We use high-precision Rotronics hygrometer to re-measure the <1%RH dry cabinet before shipping out, and issue calibration certificate, we carefully debug every cabinet and make sure everything works well after they arrive at the customer's hands, this is also a responsibility, Symor concerns about quallity control and customers' feedbacks on our dry cabinets aster using, we think this is the reason why many customers place repeat orders.

Difference between low-humidity dry cabinets and nitrogen cabinets:

▸Low humidity drying cabinets use dry units to dehumidify, no consumables, no replacements, and they absorb moisture and discharge it to the outside automatically.

▸Nitrogen purging cabinets use nitrogen gas to reach a low-humidity and low-oxygen level storage application, N2 gas is consumable.

<1%RH Low humidity control dry cabinets: Application

▸Semiconductor and Electronics Manufacturing: 

. Wafers/Chips/BGAs/PCBs: For moisture-sensitive components with a Moisture Sensitivity Level (MSL) ranging from 2a to 5a, prevents the "popcorn effect" (internal cracking) caused by the rapid vaporization of internal moisture during soldering.

. Photoresists/Fluxes: Prevents performance degradation resulting from moisture absorption.

▸Precision Optics and Instrumentation

. High-Precision Lenses / Coated Optics / Fiber End Faces

For more details about less than 1%RH Low humidity control dry cabinets, please visit our website www.climatestsymor.com, or send an email to sales@climatestsymor.com. We will reply to you as soon as possible and welcome possible cooperation.