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UL Rain And Sprinkler Test Apparatus Test Equipment

 
LIB UL Rain And Sprinkler Test Apparatus Test Equipment is specially designed for evaluating the rainproof and water ingress protection performance of outdoor electrical and electronic products. The equipment simulates natural rainfall, sprinkler exposure, and wind-driven rain conditions required by UL enclosure protection standards. It is widely used for outdoor lighting systems, electrical cabinets, photovoltaic products, industrial control enclosures, communication equipment, and automotive electrical components. The apparatus adopts a multi-nozzle spray structure with adjustable spray height from 100 cm to 200 cm, providing stable and repeatable rain simulation for laboratory testing and product certification.

The equipment uses SUS304 stainless steel construction for long-term corrosion resistance and durability in high-humidity operating environments. Equipped with an automatic water supply and filtration system, the chamber maintains stable spray pressure at 34.5 kPa while reducing maintenance requirements. LIB UL Rain And Sprinkler Test Apparatus Test Equipment features adjustable nozzle positioning, programmable spray duration, and a robust support structure suitable for both small and large enclosure products. The system complies with multiple international standards including UL 50E, UL 1598, UL 8750, UL 1703, UL 1741, UL 508, IEC 60529, and NEMA enclosure protection requirements, ensuring reliable rain resistance verification for global certification projects.
  • R-UL 020

  • LIB Industry

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LIB UL Rain And Sprinkler Test Apparatus Test Equipment features a robust SUS304 stainless steel structure with 4 precision spray heads, including 3 upper nozzles and 1 lower nozzle for full rain coverage. The nozzle spacing is 71 cm, and the spray angle is fixed at 45° to the horizontal direction in accordance with UL rain test requirements. Water pressure is maintained at 34.5 kPa through an automatic water supply and purification system, ensuring stable and repeatable testing performance.


Working Principle of the UL Rain And Sprinkler Test Apparatus Test Equipment 

1. Accurate Rainfall And Sprinkler Simulation: The UL Rain And Sprinkler Test Apparatus reproduces realistic outdoor rain exposure using calibrated stainless steel spray nozzles. The system operates with a stable spray pressure of approximately 34.5 kPa and uses 5 mm spray holes to generate controlled water droplets. Multiple spray heads positioned above and below the test sample provide uniform water coverage, effectively simulating heavy rainfall, splash water, and sprinkler exposure conditions commonly experienced by outdoor electrical equipment.

2. Adjustable Spray Height And Flexible Structure: The spray device height can be adjusted between 100 cm and 200 cm, allowing the apparatus to accommodate different enclosure sizes and test configurations. The nozzle spacing is precisely arranged according to UL standards, typically with 71 cm spacing between nozzles to ensure standardized water distribution. The spray nozzles inject water at a 45° angle to the horizontal direction, closely simulating wind-driven rain exposure in outdoor environments. The flexible frame structure supports testing of street lamps, distribution cabinets, LED fixtures, telecom boxes, photovoltaic junction boxes, and industrial control systems.

3. Automatic Water Supply And Stable Pressure Control: The equipment integrates an automatic water supply system together with water purification functions to maintain consistent spray quality during long-duration tests. Electromagnetic flowmeters continuously monitor water flow and pressure conditions, helping ensure repeatable and accurate testing results. Stable pressure regulation prevents fluctuations that could affect rain simulation consistency and certification reliability.

4. Corrosion-Resistant And Durable Construction: The internal and external structures are manufactured from SUS304 stainless steel, providing excellent resistance to corrosion caused by continuous water exposure. The reinforced frame design maintains nozzle stability during operation, while universal brake casters allow easy movement and positioning inside laboratories. The durable construction supports continuous operation for long-term environmental testing applications.

5. Intelligent And Safe Testing Operation: LIB UL Rain And Sprinkler Test Apparatus supports programmable test cycles for automated rain exposure testing. Operators can adjust spray duration, water pressure, and nozzle positioning according to different standards and product requirements. Integrated electrical protection systems, leakage protection, and overload safety functions help ensure safe operation while protecting both equipment and test samples during continuous testing.


System Specifications of the UL Rain And Sprinkler Test Apparatus 

Model

R-UL020

Overall Dimensions (mm)

800*1500*2200 mm

Height adjustment range of spray device

1000-2000 mm

Number of spray head

4 spray heads(There are 3 spray heads on the top and 1 spray nozzle on the bottom)

Nozzle spacing

710 mm

Spraying Hole Diameter

Φ5mm

Water pressure

34.5Kpa

Sample platform size

500X1500X500

Load of sample platform load

100 Kg

Water Pressure Control

Flow meter

Water supply system

Automatic water supply, Water purification system

Material

SUS304 stainless steel

Standard

UL 50E Type 3R

 

Typical UL Rain And Sprinkler Tests Performed

The UL Rain And Sprinkler Test Apparatus can perform a wide variety of enclosure protection and rain exposure tests for outdoor products. Typical testing includes heavy rain simulation for electrical cabinets, sprinkler resistance testing for outdoor LED lighting systems, water ingress evaluation for solar junction boxes, enclosure sealing verification for industrial control panels, and splash resistance testing for communication equipment housings. The apparatus can also conduct IPX3 and IPX4 rain tests with controlled spray angles and continuous water exposure cycles. Common testing conditions include continuous rainfall simulation for 1–3 hours, water pressure around 34.5 kPa, spray heights from 100 cm to 200 cm, and multi-directional nozzle coverage to ensure reliable and repeatable environmental testing results.


Video of the UL Rain And Sprinkler Test Apparatus Test Equipment 


FAQs on the UL Rain And Sprinkler Test Apparatus Test Equipment

Q 1: Can the spray height and nozzle layout be customized?

Yes. LIB supports customized spray frame height, nozzle quantity, nozzle spacing, and sample platform dimensions according to your product size and testing requirements.

Q 2: What products are commonly tested using this equipment?

The equipment is mainly used for outdoor lighting fixtures, electrical enclosures, industrial control cabinets, photovoltaic equipment, EV charging systems, and communication products requiring rain resistance verification.

Q 3: Does the system support automatic water circulation and filtration?

Yes. The apparatus includes an automatic water supply and purification system to maintain stable spray conditions and reduce maintenance workload during continuous operation.


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