OPSYTEC DR. GRÖBEL GMBH

The German Technical and Scientific Association for Gas and Water (DVGW) and the Austrian standardization committee have defined the requirements for UV water disinfection systems with UV low-pressure lamps in DIN 19294-1:2020-08. This also specifies the design, function and opening angle of DVGW reference radiometers. The previous technical rule W294-3 and ÖNORM 5873 continue to apply to devices for drinking water disinfection with medium-pressure lamps. The sensors are inserted into a pressurized water-tight measuring window tube, which enables simple and reproducible replacement of the sensors. With an aperture angle of 160°, our sensors are suitable for precise radiometric measurement of UVC irradiance in UV water disinfection systems. We offer these with reference radiometer RMD. The RMD as DVGW reference radiometeris one of the latest developments from Opsytec Dr. Gröbel GmbH.

The water-proof sensor UVX-SE serves as robust, long-term stable measuring heads for the precise measurement of UV irradiances in production lines, that have to be wet cleaned. The sensors are calibrated with traceability to the PTB (Physikalisch Technische Bundesanstalt, the German national test authority) and can be exposed to pressure of up to 10 bar. The sensors are available in eight spectral ranges and two measuring ranges. This allows the sensors to be optimally adapted for the application. The integrated electronics produce a signal that is transmitted to the PLC or panel meter, so that inferences are minimized. Operating voltage and output signal can be selected to match the measurement task or PLC interfaces. For small control tasks, the sensor UVX-SE can be connected to RM-32, which shows current irradiance on a 3.5-digit digital display and switches two relay contacts with adjustable warning and alarm signals.

The water pressure-proof UVC-SE sensors serve as robust, long-term stable measuring heads for the precise measurement of UV-C irradiances of low-pressure mercury lamps and amalgam lamps in water disinfection and wastewater systems. The sensor can be exposed to pressure of up to 10 bar. A long-term, stable high-sensitivity photo diode with a large active area of 1 cm² is used. This provides low noise and improved sensitivity, below 260 nm, compared to SIC sensors. Superior corrosion resistance and long-term stability is also achieved through the use of appropriate materials. No aging is determined over a period of one year. The sensors are calibrated with traceability to the PTB, the German national test authority. The integrated electronics produce a signal voltage that is transmitted to the PLC or panel meter RM-32, so that inferences are minimized. Operating voltage and output signal can be selected to match the measurement task or PLC interfaces.

The RMD radiometer is one of the latest developments from Opsytec Dr. Gröbel GmbH. This easy-to-use radiometer is based on more than 30 years of experience in all areas of irradiation and illuminance measurement. It features a wide dynamic range and extremely low noise. For this purpose, the sensor already contains a multi-stage amplification, an extremely precise analog-to-digital converter and a temperature sensor. The memory contained in the sensor contains all sensor identifications and the calibration history. This allows several ultraviolet sensors and visible sensors to be used on the Radiometer RMD. A wide range of sensors is available for a wide variety of production and control processes. Two sensors can be read out simultaneously. Sensors for the evaluation of erythema-weighted radiation and multi-channel sensors are also available. The measurement data are clearly displayed on the graphic display.

40 years of UV experience and consistent product development enable the optimal performance and intuitive operation of the RMD Touch laboratory radiometer. This incorporates the latest technologies such as capacitive touch displays, precision ADCs, data storage, remote update capability and much more. This makes the RMD Touch one of the most powerful multichannel radiometers on the market with superior features such as highest accuracy, reliability and modular extensions. The RMD Touch allows simultaneous measurement of multiple sensors, recording of irradiance and dose. Each sensor channel contains a high-precision 24 bit ADC and a multi-stage amplification to achieve a wide dynamic range of up to 7 orders of magnitude. The measurement of all channels is performed simultaneously.

The radiometer RM-12 is a precise, hand-held device for measuring irradiances and illuminances. Due to the sensor-integrated electronics, different sensors for UV and visible spectral ranges can be measured with the respective sensors. Sensors evaluating biological effects of irradiation are also available. The integrated diffuser serves to provide the cosine correction that is necessary with non-perpendicular irradiation. The sensors are calibrated with traceability to the PTB; after being calibrated, they are supplied with a factory calibration certificate. Repair and spare parts service is, of course, available for many years. The sensors can be supplied with different measuring ranges. APPLICATIONS: Measurement of UV lamps, UV LEDs, and light sources Controll of UV irradiation Measurement of job security due to artificial optical radiation Photometric measurements

The UVpad E combines the benefits of the spectral measuring technology with a handheld and easy to operate radiometer. The UVpad E is technically based on our successful radiometer UVpad. With the external sensor and an optimized programming, it is even more precise and easier to operate. Use the spectroradiometer UVpad E for an accurate measurement of the UV irradiance and for comparisons of different UV lamps and UV LEDs. 512 photodiodes measure the spectrum in the wavelength range of 240 – 480 nm. The categorization in UVA, UVB and UVC is taken according to international standards and traceable. The calibration to only one light source is omitted.

The UVpad is the world‘s thinnest spectral measuring and autonomous UV radiometer. It combines scientific measurement technology with a compact and user-friendly instrument. With its innovative measuring principle, it doesn't use optical filters. UV light is spectrally detected and analyzed in the UVpad. Thus, measurements are traceable to national standards. Since it works without a filter, it is particularly suitable for the measurement and comparison of different lamps. All measurement data are displayed on the device immediately; 50 measurements are stored in the UVpad and can be read via USB. The supplied PC software evaluates the irradiance intensity profiles measured separately for UVA, UVB, UVC, and VIS. Spectrum and measurement data can be exported and saved. Optionally, UV systems can be optimized due to saved operating functions such as, for example, the absorption spectra of photo initiators. Thus, the operation costs can be reduced and the product quality can be ensured.

The curelog is a precise radiometer with dose measurement and up to four spectral ranges. Due to its fast and precise measurements the curelog can universally be used for applications in the fields of lacquer curing, bonding, sterilization, disinfection, lithography and many other applications. The adjustable data recording rate of up to 2000 Hz (measurements per second) allows reliable measurements on fast running UV belt systems. The recording time of up to 180 h allows the measurement of long-lasting processes at low doses, like UV disinfection. The curelog simultaneously records up to four spectral ranges, each with a high-precision 24 bit ADC. The high-precision ADC gives the curelog a extrem high dynamic range. The resolution of 0.0001 mW/cm² and a measurement range of 50 W/cm² are the main features of the curelog. All common UV lamps and UV-LEDs can be measured and compared, no matter if spot or area lamps, fibre optics or UV/VIS LEDs are used.

Xenon excimer lamps enable new, resource-saving and more efficient production possibilities. They are used in the field of surface treatment for matting, cleaning, surface activation or to save photoinitiators. For this purpose, the narrow-band spectrum around 172 nm is usually used to irradiate under inert gas conditions. Then the high photon energy is sufficient to split almost all organic compounds. The measurement of 172 nm (VUV) is an important component for process control and optimization. With the tinyTracker 172 we offer a calibrated band radiometer which is suitable for use in an inert atmosphere. The tinyTracker 172 is absolutely calibrated and measures the irradiance and irradiation dose of xenon excimer lamps directly at 172 nm. Due to its particularly flat design, the tinyTracker172 can be guided through the irradiation channels of UV belt dryers and other industrial equipment.