Box-Type UV Accelerated Weathering Test Chamber
A box-type fluorescent UV weathering chamber designed for horizontally placed panels, finished components and irregular specimens. The adjustable specimen plane combines controlled UVA-340 exposure with condensation, top-down water spray and programmable data recording.
ModelDX-H302-2
Working zone1170 × 450 × 500 mm
Lamp system8 × 40 W UVA-340
Irradiance control4 movable sensors · ±5%
Domestic UVA-340 lamps, one perforated shelf and a once-through 12-nozzle spray circuit are standard. Philips or Atlas UVA-340 lamps, UVB-313 lamps, additional shelves, custom holders and recirculating spray water are available at additional cost.
Product Details
8 × 40 WDomestic UVA-340 lamps standard
0.35–1.20W/m²/nm at 340 or 313 nm
±5%Specified irradiance uniformity
1170 × 450 × 500W × D × H working zone, mm
12 nozzlesTop-down programmable spray
Why the box architecture matters
Use a horizontal specimen plane when the sample cannot be mounted like a standard flat panel.
The DX-H302-2 places finished parts, thick specimens and irregular shapes directly on an adjustable perforated shelf. Eight lamps are mounted in one row above the working zone, while four movable irradiance sensors follow the selected specimen-plane height.
Direct horizontal loading
Place specimens on the shelf without cutting every sample into a standard panel size.
Adjustable exposure height
Fixed shelf slots allow the test surface to be positioned at the required lamp distance.
Irregular-part capability
Custom holders can secure parts that roll, shift or require a defined orientation.
Important exposure limit: vertically stacked shelves do not receive equivalent direct UV. An upper shelf or specimen blocks radiation to the level below. Three-dimensional parts can also shadow sidewalls, recesses and undersides, so rotation or scheduled repositioning is required when multiple surfaces must be exposed.
IMAGE 01 — Verified front three-quarter product photographShow the complete single-door chamber, controller, exhaust outlet, casters and leveling feet against a clean factory background.
box-type-uv-weathering-chamber-dx-h302-2-front.webp · 1600×1200 · ALT: DX-H302-2 box-type UV accelerated weathering test chamberSpecimen loading
Configure the shelf around the actual test surface—not just the outside dimensions of the part.
The working zone measures 1170 (W) × 450 (D) × 500 (H) mm. One perforated stainless-steel shelf and anti-roll restraints are standard; up to four independently positioned shelf levels and application-specific fixtures are available at additional cost.
The nominal test-surface distance is approximately 50 mm from the lamp surface. The shelf, four irradiance sensors and central Pt100 black-panel sensor are repositioned together to maintain the intended measurement plane.
Loading sequence
- Open the interlocked single door.
- Set the shelf position for the specimen height.
- Place and restrain the specimen on the perforated shelf.
- Align sensors and the black panel with the exposure plane.
- Close the door and confirm the programmed method.
Safety: wear UV-rated eye protection and heat-resistant gloves during loading and unloading. Opening the door during operation interrupts the UV-light and heating circuits and generates a safety warning.
IMAGE 02 — Open-door working zoneShow all eight top lamps, the full 1170 × 450 mm shelf and the central black-panel sensor.
dx-h302-2-open-chamber-lamps-shelf.webp · ALT: Interior of box-type UV chamber with top lamps and adjustable shelfIMAGE 03 — Real specimen loadingShow one flat panel and two verified irregular components with restraints; do not use unrelated stock samples.
dx-h302-2-irregular-specimen-loading.webp · ALT: Irregular specimens placed on adjustable UV chamber shelfLamp and irradiance control
Control the exposure plane with four movable sensors, not lamp runtime alone.
Eight top-mounted T12 fluorescent UV lamps are controlled as one system. Four sensors move with the specimen plane and feed the closed-loop controller, which compensates lamp output and records spectral irradiance in W/m²/nm.
| Item | DX-H302-2 specification | Selection note |
|---|---|---|
| Standard lamp | 8 × domestic UVA-340, 40 W | Included in the standard price |
| Imported lamp options | Philips or Atlas UVA-340 | Additional cost; exact designation confirmed in the order |
| UVB option | UVB-313 / UVB-313EL, 40 W | Additional cost; use for aggressive comparative screening |
| Lamp length | Approximately 1200–1220 mm | Final value follows the supplied lamp model |
| UVA-340 set range | 0.35–1.20 W/m²/nm at 340 nm | Target value selected from the applicable method |
| UVB-313 set range | 0.35–1.20 W/m²/nm at 313 nm | Recalibration is required after changing lamp type |
| Display resolution | 0.01 W/m²/nm | Upper and lower alarm limits are user-adjustable |
| Uniformity | ±5% across the effective specimen plane | Manufacturer acceptance specification; third-party verification available |
Allow approximately 30 minutes for the chamber, black-panel temperature and irradiance system to stabilize before calibration or formal recording. Lamp type, monitoring wavelength and target irradiance must be reselected and recalibrated after changing between UVA-340 and UVB-313.
IMAGE 04 — Lamp and movable-sensor arrangementPhotograph the lamps switched off. Mark the eight lamp positions, four sensors, black-panel sensor and specimen plane without inventing dimensions.
dx-h302-2-eight-lamps-four-sensors.webp · ALT: Eight UVA-340 lamps and four movable irradiance sensorsUV, condensation and spray
Build the cycle around the degradation mechanism required by the material method.
UV exposure
50–70°C exposure temperature with UVA-340 or optional UVB-313 irradiance control.
Condensation
40–60°C bottom-pan evaporation produces moisture for condensation on the upper exposed surface.
Water spray
Twelve nozzles spray downward at 0.12–0.15 MPa for programmable rain and water-shock stages.
UV, condensation, spray and dark stages can operate independently or in programmed alternating sequences. The black-panel range is 50–63°C; chamber-air and black-panel temperatures are independently monitored, displayed and recorded.
Horizontal-surface note: water passes through the perforated shelf into the bottom collection area, but a flat, non-porous specimen may retain a water film or localized pooling. Drainage from the specimen itself depends on geometry, edge design and surface tension.
IMAGE 05 — Verified 12-nozzle spray and drainage pathShow nozzle positions between lamps, water falling onto a sample, perforated shelf and bottom collection/drain area.
dx-h302-2-twelve-nozzle-spray-system.webp · ALT: Twelve-nozzle top-down spray system in box-type UV chamberUtility planning
Calculate purified-water and drainage capacity from actual spray minutes.
The standard spray circuit is once-through and consumes approximately 7 L/min only while spray is active. Condensation make-up water is approximately 5 L/day. A recirculating spray-water configuration is available at additional cost when water consumption or site drainage is constrained.
Daily spray-water demand = 7 L/min × total programmed spray minutes per day.
Example: 18 minutes every 2 hours equals 216 spray minutes and approximately 1,512 L/day.
Example: 18 minutes every 2 hours equals 216 spray minutes and approximately 1,512 L/day.
Site-side water requirements
- DN15 / 20 mm male-threaded inlet
- 172–550 kPa (25–80 psi) inlet pressure
- 20 mm male-threaded drain outlet
- Drain capacity suitable for active spray flow
- Purified-water supply prepared for the selected method
- Automatic make-up and low-water protection included
Control and traceability
Program the sequence, record the exposure conditions and export the history.
The 7-inch programmable touchscreen supports Chinese and English interfaces, 100–120 stored programs, up to 100 segments per program and as many as 32,000 cycles. A single stage can run for up to 99 hours 59 minutes.
UV irradiance, chamber temperature and humidity, black-panel temperature, duration, operating stage, equipment status and alarm events can be recorded at intervals adjustable from 1 second to 60 minutes.
Included data functions
- Real-time trend curves
- Approximately 100 days of local storage, interval-dependent
- One-touch USB export
- CSV and Excel-compatible data
- Standardized report export
- RS485 and Ethernet communication
- Password-protected user permissions
- Time-stamped alarm history
- Program memory and resume after power interruption
Confirmed protection: over-temperature, low water level, door interlock, lamp-system abnormality and sensor-failure alarms, with automatic interruption of the affected circuit and audible/visual warning. A physical emergency-stop button is included.
IMAGE 06 — Controller evidence setUse a composite of the controller model label, program editor, live curves, alarm history and USB export screen. All displayed values must be real.
dx-h302-2-controller-data-export.webp · ALT: Programmable controller and data export for DX-H302-2 UV chamberMaterials and applications
Expose materials whose real geometry does not fit a conventional panel rack.
Use UVA-340 when
The objective is comparative material evaluation using the short-wave UV region of terrestrial sunlight. It is the standard configuration for formulation work, qualification programs and controlled comparisons.
Use UVB-313 when
A more aggressive short-wave exposure is required for rapid screening or QC. UVB-313 can create degradation mechanisms that do not occur outdoors, so it should not be used for direct service-life prediction.
Method review before exposure
Confirm the material standard before selecting the lamp and cycle.
The controller can reproduce UV, condensation, spray and dark-stage sequences used by applicable fluorescent-UV practices. Method review may include ASTM G154, ISO 4892-3, GB/T 16422.3, ASTM D4329, ASTM D4587, ISO 16474-3, ISO 11507, SAE J2020 and AATCC TM186. The current edition and the material-specific procedure govern the final configuration.
Do not convert exposure hours directly into outdoor service years. Accelerated exposure is used for comparative screening and controlled reproduction of selected degradation mechanisms. A service-life statement requires material-specific correlation with relevant outdoor or end-use data.
Exposure and evaluation workflow
Measure material change with the instrument appropriate to the failure mode.
The DX-H302-2 controls and records the exposure environment. Color, gloss, adhesion, mechanical strength, haze and defect ratings are evaluated before and after exposure with separate instruments or standardized visual methods.
| Property change | Evaluation | Typical reference |
|---|---|---|
| Color / yellowing | Color coordinates and ΔE with a colorimeter or spectrophotometer | Method required by the material specification |
| Gloss loss | Gloss retention at the selected 20°, 60° or 85° geometry | ISO 2813 |
| Chalking | Transfer or surface rating against the applicable reference scale | ASTM D4214 |
| Checking / cracking | Controlled visual or image-based defect rating | ASTM D660 / D661 or applicable ISO 4628 part |
| Blistering / rusting | Defect size, frequency and affected area on coated specimens | ASTM D714 / D610 or applicable ISO 4628 part |
| Coating separation | Cross-cut classification or quantitative pull-off strength | ISO 2409 / ISO 4624 |
| Mechanical retention | Tensile, elongation or impact retention versus controls | Material-specific method |
| Haze / transmission | Change in haze and luminous transmission | ASTM D1003 or selected product method |
Condition, identify and measure unexposed controls.
Run the confirmed exposure cycle with replicates.
Recondition, measure and report property retention.
Box type or tower type?
Choose the architecture from the specimen—not the cabinet appearance.
Choose DX-H302-2 box type for
- Finished parts and irregular three-dimensional specimens
- Horizontal placement on an adjustable shelf
- Samples that cannot be cut into standard flat panels
- Top-down UV and spray on one primary test surface
- Custom restraints and specimen holders
Choose tower type for
- High-throughput standardized flat panels
- Fixed lamp-to-panel geometry
- Dual-sided inclined exposure architecture
- Up to 48 defined panel positions
- Repeatable comparisons where specimen dimensions are controlled
Review the complete UV aging test chamber selection guide, or compare the Tower Type UV Aging Test Chamber before choosing the specimen architecture.
Verified specification
DX-H302-2 technical specification
| Architecture | Single-door box type; horizontal adjustable specimen shelf |
| External dimensions | 1480 (W) × 550 (D) × 1500 (H) mm |
| Working zone | 1170 (W) × 450 (D) × 500 (H) mm |
| Net weight | Approximately 138 kg |
| Standard shelf | One perforated stainless-steel shelf with anti-roll restraints |
| Additional shelf positions | Up to four levels; additional shelves at extra cost |
| Nominal specimen-plane distance | Approximately 50 mm from the lamp surface |
| Lamp system | 8 × 40 W UVA-340, one top-mounted row |
| Irradiance sensors | Four movable sensors, standard |
| Irradiance uniformity | ±5% manufacturer acceptance specification |
| UV exposure temperature | 50–70°C; tolerance ±3°C |
| Condensation temperature | 40–60°C; tolerance ±3°C |
| Black-panel temperature | 50–63°C; control accuracy ±0.5°C |
| Temperature resolution / fluctuation | 0.1°C / ≤±1°C |
| Spray | 12 top nozzles; 0.12–0.15 MPa; approximately 7 L/min |
| Power | AC 220 V, single phase, 50/60 Hz; approximately 4 kW |
| Water inlet / drain | DN15 / 20 mm male inlet; 20 mm male drain |
| Ozone exhaust | Approximately 50 mm hose connection; hose included |
| Operating environment | 5–30°C; 0–80% RH non-condensing; well ventilated |
| Clearance | At least 600 mm on all sides |
Quotation clarity
Separate standard equipment, paid options and site-side utilities.
Standard
- 8 domestic UVA-340 lamps
- One perforated shelf and restraints
- 12 spray nozzles
- 4 irradiance sensors
- Pt100 black-panel sensor
- 7-inch controller, USB, RS485 and Ethernet
- Once-through spray and automatic make-up
- Single door, casters and leveling feet
- Power, water, drain and exhaust hoses
Paid options
- Philips or Atlas UVA-340 lamps
- UVB-313 lamps
- Additional shelves up to four levels
- Custom irregular-part holders
- Recirculating spray-water system
- Double-door configuration
- Remote-control system
- Alternative voltage / transformer
- Overseas on-site installation
Buyer prepares
- Independent electrical circuit and protective earth
- Purified water at required flow and pressure
- Building-side water and drain adapters
- Adequate floor drain or drainage channel
- Safe outdoor exhaust route
- Minimum 600 mm service clearance
- External property-measurement instruments
Delivery and documentation
Confirm configuration and acceptance evidence before shipment.
- Standard lead time: approximately 15 working days
- Customized configuration: approximately 20–35 working days
- 12-month warranty and lifetime maintenance support
- Remote video commissioning and technical consultation included
- Overseas installation available at additional cost
- Fumigation-free plywood export case
- English operating manual
- Certificate of conformity and warranty card
- Packing list
- Factory whole-machine test record
- CE documentation for verification
- Third-party calibration or inspection report at no additional charge
IMAGE 07 — FAT and calibration evidenceShow the actual model nameplate, factory test checklist and redacted third-party report cover/scope. Keep report numbers and measured values readable where permitted.
dx-h302-2-fat-calibration-documents.webp · ALT: Factory test and third-party calibration documents for DX-H302-2FAQ
Questions to resolve before ordering
Can multiple shelves receive the same UV exposure at once?
No. Only the unobstructed specimen plane receives direct top-down UV. Additional shelves improve positioning flexibility, but an upper shelf blocks direct radiation to levels below.
Can the chamber test three-dimensional parts?
Yes, provided the part fits the working zone and can be safely restrained. Sidewalls, recesses and undersides may be shadowed, so rotation or scheduled repositioning is required for multi-surface exposure.
Does the standard chamber include closed-loop irradiance control?
Yes. Four movable sensors are standard and follow the selected specimen plane. UVA-340 and optional UVB-313 irradiance targets and alarm limits are user-adjustable.
How much purified water does spray consume?
The standard once-through circuit uses approximately 7 L/min while spray is active. Multiply 7 L/min by total programmed spray minutes per day. A recirculating configuration is optional.
Can UV hours be converted directly into outdoor years?
No. Accelerated exposure supports controlled comparison and failure-mechanism screening. A service-life conversion requires material-specific correlation with outdoor or end-use data.
Does the chamber measure color, gloss or adhesion?
The chamber controls and records exposure. Material-property changes are measured before and after exposure with the appropriate colorimeter, gloss meter, adhesion equipment, mechanical tester or standardized visual method.
Configuration review
Send the method and specimen before requesting a final configuration.
To confirm lamp type, shelf position, water demand, fixtures and acceptance scope, provide:
- Test standard and edition
- Material and expected failure mode
- Specimen dimensions, mass and quantity
- Primary surface requiring exposure
- UVA-340 or UVB-313 requirement
- UV, condensation and spray cycle
- Data and report requirements
- Destination-country power supply
Dexiang｜ Instruments
As a high-tech manufacturer, we integrate R&D, design, production, and sales under one roof. Our philosophy—"Quality Ensures Survival, Integrity Drives Development, and Management Yields Efficiency"—is woven into every product we build. We continuously assimilate cutting-edge global technologies and refine our practices through years of hands-on experience.
