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QUADRAN™ 365 Series



Dual-Intensity, Multi-LED, Broad-Beam Fluorescent Inspection Lamps!

Not ASTM compliant


QUADRAN™ 365 Series NDT lamps feature four ultra-hi-flux UV-A LEDs plus a convenient white light LED to quickly switch between fluorescent inspection and flaw location. A unique dual-intensity feature provides both high and standard UV-A and white light output for added versatility.

The lamps’ broad-beam configuration produces an extremely wide coverage area, making them ideal for both handheld and in-line applications. Models are available either with or without integral black light filters to meet your specific inspection requirements.

(click to enlarge)



  • Dual-intensity capability: High setting produces a nominal steady-state UV-A intensity as high as 8,000 μW/cm2; standard setting produces a nominal steady-state intensity of 4,500 μW/cm2, both at 15 inches (38 cm)

  • Extremely large coverage area of up to 6 inches (15 cm), with a minimum UV-A intensity of 1,200 μW/cm2

  • Low visible light emission — less than 2 foot-candles (22 lux)

  • Conveniently located rocker switches for quick and easy control of light sources

  • Built-in fan keeps LEDs cool to maintain optimum light output during extended use

  • Rubber bumper with Borofloat® glass lens protects LEDs from damage

  • Rugged, modular construction allows for easy field serviceability

  • Lamp handle pin receptacle allows for easy attachment of various Spectroline® mounting accessories for in-line inspection applications (accessories sold separately)

  • Choice of standard 8 foot (2.4 m) or extra-long 20 foot (6.1 m) heavy-duty power cord with AC plug and rubber boot. Also available: Optional industrial power supply or in-line power supply with cord sets (sold separately). All power supplies available in 120V, 230V, 240V and 100V models.

  • UV-absorbing spectacles and soft carrying case included


QDR-365A Model



When the QDR-365A is in high
mode, the lamp provides a nominal steady-state UV-A intensity of 8,000 μW/cm2 at 15 inches (38 cm).
When switched to the standard
intensity mode, the QDR-365A
provides a nominal steady-state
UV-A intensity of 4,500 μW/cm2
at 15 inches (38 cm). In addition, the lamp has a high/low switch to control the white light LED output.
UV-A Beam Profile
(click to enlarge)


QUADRAN™ 365  faceplate shown with (top) and without (below) integral black light filters.

(click to enlarge)


The QUADRAN™ 365   can be quickly mounted for in-line inspections
using various Spectroline®  accessories (FA-100 flexible arm shown).



As the wavelength of
the QUADRAN™ 365
moves into the visible
light range, the black
light filters significantly
reduce the output of the
lamp at 400 nm.

(click to enlarge)



Typical wavelength
output profile of
QUADRAN™ 365 with
and without internal
black light filter, with
peak at 365 nm.

(click to enlarge)


Also Available:

QUADRAN™ 365 M-Series portable, battery-operated AC/DC lamp kits. Include QUADRAN™ 365 UV lamp, rechargeable NiMH battery pack, AC and DC cord sets, smart AC charger, UV-absorbing spectacles and soft carrying case.


ASTM E3022 scope covers the performance requirements of LED (UV-A) lights used in MT/PT procedures.

These tests are intended to be performed only by the manufacturer to certify performance of specific lamp models.
Spectroline® certifies the performance of specific lamp models with rigorous in-house development and testing as per ASTM E3022.
These lamp models are shipped with fully serialized Certificates of Conformance that include the following
1) DATA: Emission spectrum measurements; temperature tests; lamp output, including UV intensity visible reading
2) SCANS: Filter transmittance curve; peak wavelength
3) IMAGES: Irradiance pattern; beam pattern
Retrofit/Upgrade to ASTM E3022 on previously purchased lamps purchased after 1/1/2013:
If your lamp was purchased without a Certificate of Conformance, it may be eligible to be upgraded to ASTM E3022.  Previously purchased lamps in the field may be required for a return and retrofit/upgrade in order to meet ASTM E3022 compliances.
UV Switch Setting

UV-A (365 nm)
intensity at
15 inches
(38 cm) ➀
Visible light
(at minimum
2000 μW/cm2)

4,500  μW/cm2
< 1 foot-candle
(11 lux)
5 in
(13 cm)
High8,000  μW/cm2
< 2 foot-candles
(22 lux)
6 in
(15 cm)

4,500  μW/cm2
< 0.5 foot-candle
(5 lux)
4 in
(10 cm)
7,000 μW/cm2
< 1 foot-candle
(11 lux)
6 in
(15 cm)



Light Source: 4 UV-A LEDs, 1 White Light LED

Lamp Style: Pistol Grip

Lamp Head (WxH): 6 x 5.5 in (15 x 14 cm)

Length: 10 in (25 cm)

Weight: 3 lb (1.36 kg)

White Light LED Intensity:
     High setting: 300 foot-candles (3,229 lux)
     Low setting: 10 foot-candles (108 lux)


Power Requirement

AC lamp
(QDR-365A, QDR-365BLA) 120VAC* power cord supplied with lamp

AC/DC lamp
(QDR-365MA, QDR-365MBLA) 120VAC*/12VDC

Battery Pack:

12V, NiMH (rechargeable)

Run time
High intensity: 2.5 hours (continuous)
Standard intensity: 4.5 hours (continuous)

Charge time
2 hours


* Also available in 120V, 230V, 240V and 100V versions

All UV-A intensity readings were taken with Spectroline® AccuMAX™ Series meter, and are factory set to the values shown


NDT Catalog.pdf (639 KB)

129141Standard, 8 foot (2.4 m) AC power cord
129145Extra-long, 20 foot (6.1 m) AC power cord
129162Power cord with 12V DC adapter for “M” series lamps
127922Particulate filter assembly
127944Standard faceplate
128094Faceplate with integral black light filters
Bench mount
BP-30Battery pack with 12V rechargeable NiMH battery
BR-150ASmart AC charger 
CC-400Soft carrying case
FA-100Flexible arm
FP-550Rubber bumper with Borofloat® glass
PS-200AIndustrial power supply with cord set
PS-300AIn-line power supply with cord set
W-6Bench mount with pin
WM-100Wall mounting bracket
UL-100UV-A lens
UVS-30UV-absorbing spectacles