QUV – The World’s Most Widely Used Weathering Tester
UV light is responsible for almost all photodegradation of durable materials exposed outdoors. The QUV tester’s fluorescent lamps simulate the critical short-wave UV and realistically reproduce the physical property damage caused by sunlight. Types of damage include color change, gloss loss, chalking, cracking, crazing, hazing, blistering, embrittlement, strength loss and oxidation.
Dew, not rain, is responsible for most of the wetness that occurs in outdoor exposure. The QUV UV test chamber’s condensation system realistically simulates dew and accelerates its effect using elevated temperature.
The condensation process automatically purifies the ordinary tap water used in the system. This is because the process of evaporating and condensing the water onto the specimens is actually a distillation process, which removes all impurities. See LU-0801 – QUV Brochure.
The QUV tester conveniently accommodates up to 48 specimens (75mm x 150mm) and complies with a wide range of international, national, and industry specifications, ensuring the reliability and reproducibility of your test program. Visit our standards page for more information.
Easy to Operate
The QUV UV tester’s simple, proven design makes it easy to install, easy to use, and almost maintenance-free. It operates completely automatically, 24 hours a day, 7 days a week. Features include:
The QUV tester is economical to purchase and to operate, because it uses:
Models (see also Features Tab)
See LU-0819 – QUV Specifications or the Features Tab for comparative capabilities.
This is a simplified version of the QUV tester for the lab where economy is critical. The model QUV/basic uses fluorescent UV lamps and a condensation system for moisture simulation. The model, however, does not include the SOLAR EYE irradiance control. Consequently, the light intensity cannot be adjusted or calibrated. This means the QUV/basic tester cannot be used for high irradiance testing. In addition, periodic lamp replacement and repositioning is required.
Q-Lab recommends the QUV/basic tester for comparative exposures where the test specimens and the control specimens are exposed at the same time, in the same tester.
The most popular QUV model features the SOLAR EYE Irradiance Control, for precise maintenance of UV light intensity. The QUV/se tester uses a proven condensation mechanism to simulate outdoor moisture attack.
The SOLAR EYE system is a precision control system that automatically maintains light intensity through a feedback loop. The controller monitors UV intensity and compensates for lamp aging and variability by adjusting power to the lamps. The SOLAR EYE system provides:
For more information on the benefits of the SOLAR EYE irradiance control system, see LU-0801 – QUV Brochure.
The QUV/spray tester has the same functions as a standard QUV/se, but also includes a water spray system. Short periods of spray can be used to create a thermal shock. Longer periods can be used to achieve mechanical erosion. The QUV/spray tester can be set to produce: UV alone, spray alone, or condensation. Deionized water is recommended for all spray applications.
UVC light is used widely in ultraviolet germicidal irradiation (UVGI), a technique used to eliminate harmful viruses and bacteria. This short-wavelength, high-energy UVC light can also degrade the materials and surfaces it disinfects. The QUV/uvc model uses UVC lamps to deliver light concentrated at 254 nm to test for material durability against photodegradation effects resulting from exposure to UVC light. The QUV/uvc tester has multiple safety features to prevent stray UVC light from escaping; it is also not equipped with condensation or water spray.
Some industry test methods specify the use of cool white fluorescent lamps for indoor photostability testing. To reproduce these indoor light conditions, the QUV/cw uses ordinary cool white fluorescent lamps. It has a SOLAR EYE irradiance control system that monitors and controls visible light output, rather than UV. See LU-0823 – QUV/cw Summary for more information.
All QUV UV testers precisely control temperature to enhance accuracy and accelerate test results. Although temperature does not normally affect the primary photochemical reaction, it does affect the rate of any subsequent reactions. Therefore, the QUV tester’s ability to control temperature is essential during UV exposure.
Versatile Specimen Mounting
Standard specimen holders easily adjust for any thickness up to 20mm (3/4″) and allow fast, snap-action specimen mounting. Retaining rings provide positive hold-down and do not require that test specimens be cut to close tolerance. In addition, custom holders are available for mounting various products, such as lenses, larger specimens, and 3-D components. See the accessories tab or our specimen mounting page for more information.
Controls & Optional Software
The Dual Touchscreen Display is designed to be both functional and easy-to-use. The QUV main controller features dual, full-color touchscreen displays and can be programmed in eight user-selectable languages (English, French, Spanish, Italian, German, Chinese, Korean, and Japanese). This system includes complete self-diagnostic error checking, constantly monitoring the status and performance of all systems. It also displays tester error messages and routine service reminders as needed. The multicolor LED status indicator light updates users on the tester’s operational state at a glance.
An external USB port on every QUV tester allows users to perform software upgrades quickly to address key performance issues. For quality systems that require documented proof of test conditions, this USB port can also be used to download tester performance history. Additionally, every QUV tester is equipped with an Ethernet connection. Optional VIRTUAL STRIPCHART PC software allows the user to automatically record and monitor exposure conditions and directly transfer data from the QUV UV test chamber to a Windows-based computer. Data from either the USB export or PC application can be emailed directly to Q-Lab’s technical support desk for expert troubleshooting and diagnostics.
Fluorescent UV lamps are inherently more stable than other types of lamps, including xenon arc lamps. The spectral power distribution (SPD) does not change with lamp aging, even up to 8,000 hours. This gives more reproducible test results, fewer lamp changes, and lower operational costs.
Q-Lab produces more UV lamps than the rest of the weathering industry combined. Q-Lab’s lamps are specially engineered to our own proprietary specifications, based on our 50 years of experience with fluorescent UV technology. We have the most stringent quality control testing in the industry. The result is that the QUV tester provides the most consistent, stable spectrum, year after year.
Several different types of UV lamps are available for different applications, which are listed below. See LU-8160 – A Choice of Lamps for QUV and LU-0823 – QUV/cw Summary for more specific application guidelines
The QUV tester’s UVA-340 lamps give the best simulation of sunlight in the critical short wavelength region from 365 nm down to the solar cut-off of 295 nm. See LU-8052 – SPD for QUV UVA-340.
UVA-340+ lamps offer the same spectrum as UVA-340 lamps but provide longer lifetime at high irradiance, up to 1500 hours at 1.55 W/m2/nm and 750 hours at the maximum irradiance (1.70 W/m2/nm).
The QUV UV tester’s UVA-351 lamps simulate the UV portion of sunlight filtered through window glass. It is most useful for interior applications, for testing of some inks and for polymer damage that can occur in an environment near a window. See LU-8053 – SPD for QUV UVA-351.
The QUV tester’s UVB-313EL lamps maximize acceleration utilizing short-wave UV that is more severe than the UV normally found at the earth’s surface. Consequently, these lamps may produce unrealistically severe results for some materials. UVB-313EL lamps are most useful for QC and R&D applications, or for testing very durable materials. See LU-8051 – SPD for QUV UVB-313EL.
UVB-313EL+ lamps offer nearly the same spectrum as UVB-313EL lamps but provide longer lifetime at high irradiance, up to 1500 hours at 1.55 W/m2/nm and 750 hours at the maximum irradiance (1.70 W/m2/nm)
UVC lamps deliver high-intensity, monchromatic, short-wave UV light at 254 nm, which is well below the solar cut-on. This wavelength represents the most common type of UVC emission used for disinfection of surfaces exposed to harmful bacteria and viruses. While it can kill these pathogens effectively, UVC light can also cause photodegradation of plastics, coatings, and fabrics. UVC lamps reproduce this damaging irradiance, in order to evaluate durability of materials exposed to UVC light
Also known as FS-40 or F40 UVB, this is the original QUV lamp. FS-40 lamps are still specified in a few legacy automotive test methods. QFS-40 lamps should only be used in the QUV/basic tester. See LU-8050 – SPD for QUV QFS-40.
Cool White Lamps
The QUV UV test chamber’s cool white lamps (used only in model QUV/cw) effectively reproduce and accelerate indoor lighting conditions encountered in office and commercial environments as well as retail display lighting. See LU-8049 – SPD for QUV/cw.
Unlike xenon arc test chambers, the QUV tester does not require the use of any optical filters.
Easy Calibration Assures Accuracy
The QUV black panel temperature sensor needs to be calibrated periodically by the user to assure accurate and consistent results. Calibrating the QUV black panel temperature sensor is quick and simple, and is performed with any standard reference thermometer.
Easy Calibration Assures Accuracy
For all models except QUV/basic, the QUV SOLAR EYE irradiance sensor needs to be calibrated periodically by the user to assure accurate and consistent results. Calibrating the QUV tester using the AUTOCAL system is extremely simple. It takes only a few minutes and virtually eliminates human error.
Q-Lab has two classes of devices used for irradiance calibration. The Universal Calibrator system is standard with all new QUV testers and is fully compatible with all previous model, as well as Q-SUN testers. The CR10 is Q-Lab’s legacy QUV irradiance calibration system but remains forward-compatible with all new QUV testers. For more information, see LU-0801 – QUV Brochure.
Universal Calibrator (UC) System Radiometer Models
*The UC system works with all irradiance-controlled QUV and Q-SUN testers but the UC1 is not needed for new QUV and Q-SUN testers.
UC10 smart sensors need to be replaced yearly for a newly-calibrated device. This is the most cost-effective option for most users. UC10 smart sensors can, alternatively, be returned to Q-Lab once per year for an inexpensive recalibration. See Recalibration Return Procedure.
CR10 and CR10/cw radiometers need to be returned to Q-Lab once per year for an inexpensive recalibration. See Recalibration Return Procedure.
Our calibration labs are accredited to ISO 17025 by the American Association of Laboratory Accreditation (A2LA – Ohio Certificate Number 2382-01, China Certificate Number 2383-02, and England Certificate Number 2383-03). Calibrations are traceable to the U.S. National Institute of Standards and Technology (NIST).
Versatile Specimen Mounting
Standard specimen holders adjust for any thickness up to 20mm (3/4″) and allow fast, snap-action specimen mounting. Retaining rings provide positive hold-down and do not require that test specimens be cut to close tolerance.
In addition, custom holders are available for mounting various products, such as lenses, larger specimens, and 3-D components. Bottle holders, textile holders and special mountings are also available. See LU-8001 – QUV Sample Mounting or the specimen mounting page for more detailed information.
Water Repurification System
To significantly reduce the cost of running the QUV tester’s optional water spray system, Q-Lab offers an optional water repurification system that reuses the water that normally would go down the drain.
Space Saver Frame
In labs where space is a premium, QUV UV testers can be stacked two-high with space saver frames. See LU-0820 – QUV Space Saver Specifications for more detailed information.
Voluntary Specification, Performance Requirements and Test Procedures for High Performance Organic Coatings on Fiber Reinforced Thermoset Profiles
This specification describes test procedures and performance requirements for high performance, organic, coatings applied to fiber reinforced thermoset profiles for windows, doors and similar products.
Weather Resistance: UV Light and Moisture Exposure
This test method provides a procedure for the exposure of textile materials of all kinds, including coated fabrics and products made thereof, in a laboratory artificial weathering exposure apparatus employing fluorescent UV lamps as a light source and using condensing humidity and/ or water spray for wetting.
Standard Test Method for Accelerated Weathering of Solvent-Release-Type Sealants
This test method includes two laboratory accelerated exposure procedures for predicting the effects of ultraviolet or ultraviolet/visible radiation, heat, and moisture on color, chalking, cracking, and adhesion of solvent-release sealants.
Practice for Conducting Tests on Sealants Using Artificial Weathering Apparatus
This practice covers three types of laboratory weathering exposure procedures for evaluating the effect of actinic radiation, heat, and moisture on sealants.
Standard Test Method for Color Stability of Building Construction Sealants as Determined by Laboratory Accelerated Weathering Procedures
This test method describes laboratory accelerated weathering procedures using either fluorescent ultraviolet or xenon arc test devices for determining the color stability of building construction sealants.
Standard Test Method for Evaluating Durability of Building Construction Sealants by Laboratory Accelerated Weathering Procedures
This test method covers the method for the determination of the durability of a sealant based on its ability to function in cyclic movement maintaining adhesion and cohesion after repeated exposure to laboratory accelerated weathering procedures.
Standard Test Method for Aging Effects of Artificial Weathering on Latex Sealants
This test method covers a laboratory procedure for the determination of aging effects of artificial weathering on latex sealants.
Standard Test Method for Low-Temperature Flexibility of Latex Sealants After Artificial Weathering
This test method covers a laboratory procedure for the determination of low-temperature flexibility of latex sealants after 500 h artificial weathering.
Standard Test Method for Effects of Laboratory Accelerated Weathering on Elastomeric Joint Sealants
This test method covers a laboratory procedure for determining the effects of accelerated weathering on cured-in-place elastomeric joint sealants (single- and multi-component) for use in building construction.
Standard Test Method for Rubber Deterioration-Discoloration from Ultraviolet (UV) and Heat Exposure of Light-Colored Surfaces
This test method covers techniques to evaluate the surface discoloration of white or light-colored vulcanized rubber that may occur when subjected to UV or UV/visible exposure from specified sources under controlled conditions of relative humidity, or moisture, and temperature.
Standard Test Method for Failure End Point in Accelerated and Outdoor Weathering of Bituminous Materials
This test method covers the use of a spark generating apparatus for determination of failure due to cracking of bituminous materials undergoing accelerated or outdoor weathering on electrically conductive backings.
Standard Practice for Evaluating the Relative Lightfastness and Weatherability of Printed Matter
This standard describes procedures for the determination of the relative lightfastness and weatherability of printed matter under the following conditions, which involve exposure to natural daylight or accelerated procedures in the laboratory.
Standard Guide for Testing Coating Powders and Powder Coatings
This guide covers the selection and use of procedures for testing coating powders and powder coatings. The test methods included are listed in Table 1. Where more than one test method is listed for the same characteristic, no attempt is made to indicate superiority of one method over another. Selection of the methods to be followed must be governed by experience and the requirements in each individual case, together with agreement between the purchaser and the seller.
Standard Specification for Polypropylene Injection and Extrusion Materials
This specification covers polypropylene materials suitable for injection molding and extrusion. Polymers consist of homopolymer, copolymers, and elastomer compounded with or without the addition of impact modifiers (ethylene-propylene rubber, polyisobutylene rubber, and butyl rubber), colorants, stabilizers, lubricants, or reinforcements.
Standard Practice for Fluorescent UV Exposure of Plastics
This practice covers specific procedures and test conditions that are applicable for fluorescent UV exposure of plastics conducted in accordance with Practices G151 and G154.
Standard Specification for Poly(Vinyl Chloride) Sheet Roofing
This specification covers flexible sheet made from poly(vinyl chloride) resin as the primary polymer intended for use in single-ply roofing membranes exposed to the weather.
Standard Practice for Fluorescent UV-Condensation Exposures of Paint and Related Coatings
This practice covers the selection of test conditions for accelerated exposure testing of coatings and related products in fluorescent UV and condensation devices conducted according to Practices G151 and G154.
Standard Practice for Accelerated Testing for Color Stability of Plastics Exposed to Indoor Office Environments
This practice covers the basic principles and operating procedures for using fluorescent light to determine color stability of plastics when materials are exposed in typical office environments where fluorescent overhead lighting and window-filtered daylight are used for illumination and where temperature and humidity conditions are in accordance with American Society of Heating, Refrigerating, and Air-conditioning Engineers (ASHRAE) recommendations for workers’ comfort.
Standard Practice for Accelerated Weathering Test Conditions and Procedures for Bituminous Materials (Fluorescent UV, Water Spray, and Condensation Method)
This practice describes test conditions and procedures for fluorescent UV and condensation exposures conducted according to Practices G151 and G154 for bituminous roofing and waterproofing materials that have a minimum softening point of approximately 95°C (200°F) as determined by Test Method D36.
Standard Specification for Nonvulcanized (Uncured) Rubber Sheet Used as Roof Flashing
This specification covers nonvulcanized (uncured) rubber sheet made of EPDM (ethylene-propylene-diene terpolymer) or CR (polychloroprene) intended for use as watertight roof flashing exposed to the weather.
Standard Practice for Fluorescent Ultraviolet (UV) Exposure of Photodegradable Plastics
This practice covers the specific procedures applicable for fluorescent Ultraviolet (UV) exposure of photodegradable plastics conducted in accordance with Practices G151 and G154.
Standard Practice for Cyclic Salt Fog/UV Exposure of Painted Metal, (Alternating Exposures in a Fog/Dry Cabinet and a UV/Condensation Cabinet)
This practice covers basic principles and operating practice for cyclic corrosion/UV exposure of paints on metal; using alternating periods of exposure in two different cabinets: a cycling salt fog/dry cabinet, and a fluorescent UV/condensation cabinet.
Standard Guide for Testing Industrial Protective Coatings
This guide covers the selection and use of test methods and procedures for testing industrial protective coatings.
Standard Test Method for Rubber Deterioration Using Artificial Weathering Apparatus
This test method covers specific variations in the test conditions and procedures that shall be applicable when Practice G151 plus either Practice G152, G153, G154, or G155 are employed for exposure of vulcanized rubber compounds.
Standard Test Method for Tensile Properties of Thin Plastic Sheeting
This test method covers the determination of tensile properties of plastics in the form of thin sheeting and films (less than 1.0 mm (0.04 in.) in thickness).
Standard Practice for Exposure of Adhesive Specimens to Artificial Light
This practice covers the basic principles and operating procedures for ultraviolet (UV) light aging (with or without water) of adhesive bonded joints having at least one glass or transparent adhered, using fluorescent UV (see Method A) or xenon-arc light sources (see Method B).
Standard Test Methods for Rubber Property—Staining of Surfaces (Contact, Migration, and Diffusion)
These test methods cover techniques to evaluate three types of staining that rubber may cause when in contact with, or in proximity to, another surface that may be light colored.
ASTM E3006, Standard Practice for Ultraviolet Conditioning of Photovoltaic Modules or Mini-Modules Using a Fluorescent Ultraviolet (UV) Lamp Apparatus
This practice covers specific procedures and test conditions for performing ultraviolet conditioning exposures on photovoltaic modules or mini-modules using fluorescent ultraviolet lamps.
Standard Test Method for Evaluation of Transparent Plastics Exposed to Accelerated Weathering Combined with Biaxial Stress
This test method covers the resistance of transparent plastics exposed to environmental conditioning (accelerated weathering) under a biaxial stress state induced by a pressure cell/test fixture.
Standard Practice for Determining the Lightfastness of Ink Jet Prints Exposed to Indoor Fluorescent Lighting
This practice covers an accelerated procedure intended to determine the lightfastness of ink jet prints in office environments where overhead fluorescent light is used for illumination.
Practice for Exposing Nonmetallic Materials in Accelerated Test Devices That Use Laboratory Light Sources
This practice provides general procedures to be used when exposing nonmetallic materials in accelerated test devices that use laboratory light sources.
Practice for Operating Fluorescent Light Apparatus for UV Exposure of Nonmetallic Materials
This practice covers the basic principles and operating procedures for using fluorescent UV light, and water apparatus intended to reproduce the weathering effects that occur when materials are exposed to sunlight (either direct or through window glass) and moisture as rain or dew in actual usage.
Coil Coated Metals – Test Methods Part 10: Resistance to Fluorescent UV Radiation and Water Condensation
Plastics-Methods of the exposure to laboratory light sources Part 1:general guidance
This part of GB / T 16422 provides information and general principles on the selection and implementation of exposure methods described in detail in the following sections. It also describes and recommends methods for determining irradiance and radiation levels, and describes monitoring boxes Equipment requirements for body air temperature and surface temperature of dark and light colored materials.
Plastics – Methods of exposure to laboratory light sources – Part 3: Fluorescent UV lamps
This part of GB / T 16422 specifies the test method for the exposure of test specimens in test equipment equipped with fluorescent ultraviolet radiation, heat and water. A natural aging effect that occurs under daylight.
UV test photovoltaic (PV) modules
This standard specifies tests for assessing the resistance to ultraviolet radiation of photovoltaic modules when exposed to ultraviolet radiation. This test is suitable for assessing the resistance to UV radiation of materials such as polymers and protective layers.
Test method for yellowing resistance of wood coatings
This standard specifies the test method for the determination of yellowing resistance of single-layer or multi-layer coatings of wood coatings using fluorescent ultraviolet aging equipment.
Paints and varnishes – Exposure of coatings to artificial weathering – Exposure to fluorescent UV lamps and water
This standard specifies test methods for determining the weathering resistance of coatings using test equipment containing fluorescent UV lamps and condensation or water spray.
Textiles – Tests colour fastness – Colour fastness to light yellowing
This standard specifies the test method for the light yellow fastness of textile materials exposed to ultraviolet light.
Accelerated weathering test methods of automotive nonmetal components and materials using a fluorescent UV and condendation apparatus
This standard specifies the test methods and evaluation methods for accelerated aging of automotive non-metal parts and materials using ultraviolet aging test equipment.
Textile – Tests for weather resistance – UV light exposure
This standard specifies the test method for UV exposure and aging of outdoor textiles and the determination of the change in properties before and after aging.
Procedures for Laboratory Accelerated Exposure of Automotive Materials
These procedures are used to determine the resistance to degradation of automotive materials when subjected to artificial light sources. It describes exposures to sunshine carbon arc, xenon arc, fluorescent ultraviolet light and condensation apparatus, and a twin carbon arc.
Crystalline Silicon Terrestrial Photovaltalic (PV) Modules – Design Qualification and Type Approval
UV Test for Photovaltalic (PV) Modules
Paints and Varnishes – Exposure of coatings to artificial weathering- Exposure to fluorescent UV lamps and water
This International Standard specifies exposure conditions for paint coatings exposed to artificial weathering in apparatus including fluorescent UV lamps and condensation or water spray.
Plastics – Artificial weathering including acidic deposition
Plastics – Methods of Exposure to Laboratory Light Sources – Part 1: General guidance
Plastics – Methods of Exposure to Laboratory Light Sources – Part 3: Fluorescent UV Lamps
Accelerated Exposure of Automotive Exterior Materials Using a Fluorescent UV and Condensation Apparatus
Looking for a specific test standard? Search entire listing of all standards.
The QUV accelerated weathering tester reproduces the damage caused by sunlight, rain and dew. In a few days or weeks, the QUV UV tester can reproduce the damage that occurs over months or years outdoors. To simulate outdoor weathering, the QUV accelerated tester exposes materials to alternating cycles of UV light and moisture at controlled, elevated temperatures. It simulates the effects of natural sunlight and artificial irradiance using special fluorescent UV lamps in the UVA, UVB, and UVC portions of the spectrum. It simulates dew and rain with condensing humidity and/or water spray. The QUV accelerated weathering tester is the simplest, most reliable, and easiest to use weathering tester available. With thousands of testers in use worldwide, it is the world’s most widely used weathering tester.