QSO3 Inline sensor

Engineered for High UV Intensity

The QSO3 Online Sensor has been developed for reliable UV measurement of medium-pressure UV lamps or UV LEDs in continuous operation. Both the high UV intensity and elevated temperatures present significant challenges for stable measurements. By combining carefully selected materials with a specialized quartz rod system, the QSO3 offers a robust yet easy-to-use solution for online UV monitoring.

Since measurement values are strongly influenced by the mounting position, the QSO3 is designed as a relative measuring device. This means that readings are set to 100% under reference conditions with a new lamp, reflector or comparable setup. The sensor can be conveniently installed close to the UV source, such as at the edges of the reflector, ensuring consistent and practical UV monitoring in real-world applications.

General Product Overview

Technical Information

Configuration	Options
UV Measuring range	UV-A 325nm - 405nm, max. 340nm UV-B 265nm - 325nm, max. 315nm UV-C 230nm - 280nm, max. 265nm UV-VIS 280nm - 440nm, max. 400nm UV-LED 280nm - 440nm, max. 400nm
Measuring range	25 to 2.000 mW/cm² (UV-A, -B, -C, -Vis) 50 to 20.000 mW/cm² (= 20W/cm²) (UV LED)
Amplification factors	1, 10, 100, 1000 and in combination 0.3
Output signal	0-10 V DC (propotional to irradiance), max. 2 mA
Auxiliary voltage	24 V DC, max. 5 mA
Measuring distance to UV source	approx. 20 .... 100 mm
Max. permissable intensity	10,000 mW/cm² for max. 10 min 30,000 mW/cm² for max. 10 s
Air purging	1/8” (max. 0,5 bar)
Dimensions (WxHxT)	approx. 45 x 45 x 34 [mm] stainless steel protection tube: L = 140 mm, ø 8 mm
Weight	approx. 200 g
Temperature range	Sensor box: 15°C...50°C (continuously) Quartz rod at measuring window: approx. 300° C End of stainless steel tube: max. 300 °C (continuously)