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Product description

UV-3726 Irradiance Detector for UV-C LEDs and low-pressure Hg lamps

The UV-3726 model offers all the properties and features of the UV-37 series detectors. They are specially designed for radiometric measurement tasks in the UV spectral region and have been proven in industrial and scientific use over many years. 

The UV-3726 detector incorporates a photodiode that is only sensitive in the short-wave spectral range. In conjunction with additional optical filtering, only radiation in the specified spectral sensitivity range is measured. This combination enables the radiometric measurement of UV-C LEDs and low-pressure mercury lamps. Selectable calibration factors for common UV LED wavelengths and low-pressure Hg lamps increase the measuring accuracy.

To measure the irradiance, the detector’s entrance optic is a diffuser with a cosine field of view, which must be positioned in the desired plane of measurement. The diffuser, optical correction filter and photodiode are pre-aged with UV radiation to significantly reduce the inevitable aging process that results from exposure to UV radiation. The UV-3726 detector shows very little aging effects even in intensive use. Any changes are recorded and corrected as part of the recommended annual recalibration.

The photodiode of the UV-3726 detector offers a strictly linear relationship between the measurement signal and the irradiance in the range from a few pico amps (10-12 A) to several micro amps (10-6 A). When connected to the Gigahertz-Optik X1-1-V02 meter it provides a linear measurement range up to at least 1000 mW / cm² with a resolution of 0.002 µW / cm².


Calibration

Reliable measurements in absolute units require the calibration of the measuring device with traceability to national metrological institute (NMI) standards. Since 1993, the Gigahertz-Optik measuring laboratory has been accredited as a calibration laboratory by the PTB (Physikalisch-Technische Bundesanstalt) and the DAkkS (German Accreditation Body) for the measurement of spectral responsivity and spectral irradiance. Since then, all factory calibrations have been closely based on the calibration standards and quality management of the accredited calibration laboratory. Therefore, the factory calibrations of Gigahertz-Optik offer the highest possible level of traceability and have been accepted worldwide for many years.

In accordance with the requirements of individual industrial sectors, part of the measuring laboratory is accredited by the DAkkS as a DIN EN ISO / IEC 17025 test laboratory.

The UV-3726 detector is calibrated for its spectral responsivity. When performing a measurement, the nominal wavelength of the UV-LED or Hg lamp can be selected on the X1-1-V02 meter for highest precision. The meter offers several calibration options:

  •  An average calibration factor for measuring any UV LEDs in the spectral range
    from 260 nm to 290 nm.
  • A specific calibration factor for measuring low-pressure Hg lamps (at 254nm).
  • Eleven, wavelength dependent, calibration factors given in 5 nm increments from 250 to 300 nm for measuring UV LEDs with known nominal wavelength.

Typical spectral sensitivity of the UV-3726 detector shown together with typical germicidal UV LEDs at 265, 275 und 285 nm.

Typical spectral sensitivity of the UV-3726 detector shown together with low-pressure Hg germicidal lamp at 254 nm.

Typical field of view with good cosine correction

Calibration
Calibration

Calibration of irradiance responsivity in A/(W/m²).

Eleven calibration factors in 5 nm steps (250-300 nm) plus 254nm and average calibration factor (260-290nm).

Specification
spectral responsivity

UV 240 nm - 320 nm

typical responsivity

50 µA / (W / cm2)

Max. signal current 50 µA
Input optics 11 mm Ø diffusor window
Input optics Cosine F.O.V.
Housing 37 mm Ø, 32 mm height
Mounting side M6 thread hole
Connector coaxial cable 2 m Long, with BNC (-1), calibration data (-2) or ITT (-4) connector
temperature range

(5 - 40) °C

temperature coefficient: -0.134 %/°C

(*determined with 254 nm lamp)

 

min. signal current

depends on optometer

Type Description File-Type Download
Datasheet UV-3726 PDF
Produktname Product Image Description Show product
P-9710 High-quality device for measurement of CW-, single pulse and modulated radiation.

Features: Optometer for all detector heads with calibration data plug. Measurement modes: CW, pulse energy, dose, peak-to-peak, effective luminous intensity (Blondel-Rey), data logger, battery, main power, RS232
X1 Four-channel USB optometer designed for mobile use.

Features: Compact device for use with all photometric, radiometric, colorimetric, plant-physiologic and photo-biologic measurement heads from Gigahertz-Optik. USB interface. Battery operation or power supply USB.
X1-RM Optometer in 3HE housing for use in 19” racks.

Features: Its USB and RS232 remote interface and two additional RS232 device interfaces make the device highly flexible when it comes to system integration. Its four signal inputs enable use with all photometric, radiometric, colorimetric, plant-physiologic and photo-biologic measurement heads from Gigahertz-Optik.
X1-PCB Optometer module.

Feature: The X1 optometer is available as a printed circuit board either with or without a housing and is suited for applications that do not require a keyboard or display. Four signal inputs enable connection with all measuring heads from Gigahertz-Optik.
P-2000 Two-channel optometer.

Features: For use with most photometric and radiometric detectors supplied by Gigahertz-Optik. Modes: CW, pulse energy from both single and multiple flashes, effective luminous intensity (Blondel-Rey), data logger and others.
P-9801 Eight-channel optometer.

Features: State-of-the-art 8 channel laboratory optometer with a signal amplifier and sample & hold ADC per channel for clocked recording of the measurement signals. RS232 and IEEE488 interface. Trigger input and output.
P-9802 Light meter for laboratory use with up to 36 measurement heads.

Features: For use with up to 36 photometric and/or radiometric measurement heads. RS232 interface.
X1-PCBC Optometer module.

Feature: The X1 optometer is available as a printed circuit board either with or without a housing and is suited for applications that do not require a keyboard or display. Four signal inputs enable connection with all measuring heads from Gigahertz-Optik.
Article-Nr Modell Description Request / Compare
Product
15311751 UV-3726-1

Detector with -1 type connector. Calibration with factory calibration certificate.

15311750 UV-3726-2

Detector with -2 type connector. Calibration with factory calibration certificate.

15311665 UV-3726-4

Detector with -4 type connector. Calibration with factory calibration certificate.

15312096 UV-3726-5

Detector with -5 type connector. Calibration with factory calibration certificate.

Calibration
15311968 KP-UV3726X1-E-I

Option: DIN EN ISO/IEC 17025 Test Certificate (DAkkS) for 254 nm Hg lamps. Contact sales team for other wavelength options. In combination with X1 optometer.

15311969 KP-UV3726P9710-E-I

Option: DIN EN ISO/IEC 17025 Test Certificate (DAkkS) for 254 nm Hg lamps. Contact sales team for other wavelength options. In combination with P-9710 optometer.

Re-calibration
15311689 K-UV3726-E-V01

Re-calibration of UV-3726 with factory certificate

15300571 K-UV-SR

Re-calibration of the relative spectral responsivity.

15311967 KKP-UV3726X1-E-I

DIN EN ISO/IEC 17025 Test Certificate (DAkkS) for 254 nm Hg lamps. Contact sales team for other wavelength options. Includes factory calibration.  In combination with X1 optometer.

15311970 KKP-UV3726P9710-E-I

DIN EN ISO/IEC 17025 Test Certificate (DAkkS) for 254 nm Hg lamps. Contact sales team for other wavelength options. Includes factory calibration.  In combination with P-9710 optometer.

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