This Product is discontinued, please contact us if you are still interested. An alternative is e.g:

Mobile Erythemal Radiometer

The XD-45-ERYC-4 irradiance detector is specially designed for the measurement of the Erythemal effective UV radiation in tanning equipment. Gigahertz-Optik’s X14 optometer enables health and safety executives to do on-site measurements at the tanning salon conforming to published safety standards.

Measurement of the UV-C Limit Value

The relevant German UVSV (Verordnung zum Schutz vor schädlichen Wirkungen künstlicher ultravioletter Strahlung) specifies the limit values for Erythemal effective irradiance at 0.3 W/m² within the wavelength range from 250 nm to 400 nm. From 200 nm to 280 nm the irradiance should not exceed 0.003 W/m². The XD-45-ERYC-4 detector is set-up with a third UV-C sensor to measure any existing UV-C radiation at 254 nm with low uncertainty.

Cosine Corrected Field of View

The angular response of the XD-45-ERYC-4 detector is cosine corrected.

Traceable Calibration

Calibration of the detector responsivity is performed by the Gigahertz-Optik GmbH calibration laboratory for optical radiation measurements quantities. As with all light detectors supplied by Gigahertz-Optik calibration of absolute detector responsivity as well as detector individual measured relative spectral responsivity data is included.

Recommended Optometer


XD-45-ERYC-4 - typical spectral responsivity
spectral responsivity


UV-A (320 - 400) nm Sensor
 Spectral Function

Actinic UV-A

Typical Responsivity

7.5E-7 A/(W/m²)


50 µA

Sensing Area

8 mm Ø
Cosine diffuser

UV-BC (250 - 320) nm Sensor
 Spectral Function

Actinic UV-BC

Typical Responsivity

9.8E-10 A/(W/m²)


100 µA

Sensing Area

8 mm Ø
Cosine diffuser

UV-C 254 nm Sensor
 Spectral Function


Typical Responsivity

1.3E-9 A/(W/m²)


50 µA

Sensing Area

8 mm Ø
Cosine diffuser


45 mm

temperature range

(5 - 40) °C

Cable Length

2 m



Type Description File-Type Download
Datasheet XD-45-ERYC PDF
Produktname Product Image Description Show product
X1-4 Broadband radiometer for radiation protection measurements of UV radiation devices.

Features: Mobile ligh meter for UV radiation while working with artificial UV (UVSV). Erythema effective irradiance and detection of UV-C radiation in accordance with the UV protection Act for solaria. UVSV, DIN EN 60335-2-27 and DIN 5050-1:2010-01 conformity.
Article-Nr Modell Description Request / Compare
15298270 XD-45-ERYC (-4 Connector)

Detector, Factory calibration certificate

15311556 KP-XD45ERYCX1-E-I

Option: DIN EN ISO/IEC 17025:2018 Test Certificate (DAkkS).

Integral irradiance in the wavelength range 250 nm - 320 nm and 320 nm - 400 nm.In combination with X1 optometer.

15300482 K-XD45ERYC-I

recalibration with calibration certificate

15300571 K-UV-SR

Calibration of relative spectral responsivity from 250 nm to 550 nm

15311557 KKP-XD45ERYCX1-E-I

Factory Calibration Certificate with DIN EN ISO/IEC 17025:2018 Test Certificate.

In combination with X1 optometer.

Product tags