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RMD Pro - The fully digital radiometer

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.

The newly developed diffuser achieves a very good cosine correction with excellent lateral uniformity. The radiation to be measured is distributed evenly over several channels, so that, for example, the simultaneous determination of UVA irradiance and illuminance is possible.

Compared to the RM-22, the RMD features a significantly higher resolution of 24 bit, an extended measuring range of up to 7 orders of magnitude, multi-channel sensors and the simplified operation.
The measured values can be stored in the RMD and output via USB. With the corresponding software, the RMD can be controlled from the PC. The device can be supplied with power via battery or power supply unit and records measurement data for up to 100 days.



  • Measurement of UV LEDs & UV light sources
  • NDT, material testing
  • Monitoring of UV irradiation systems
  • Measurement of job security
  • Measurement of Heff and HUVA
  • Multi-channel measurements
  • Applications with high dynamics
  • Data logging


Sensor connectors 2, fully digital
PC interface USB 2.0
Display graphical, 128 x 64 px
Display output 1 + 2 channels
Irradiance + Dose
  Min/Max Irradiance
Dimensions 160 x 85 x 35 mm
Weight 250 g
Power supply internal Li-Ion battery, USB
  230 V plug-in power supply
Internal memory 8 GB
Sampling rate adjustable: 1 s - 15 min
Recording time > 2400 h
Operation temperature 0 to 40 °C
Storage temperature -20 to 60 °C
Humidity < 80% non-condensing

The RMD radiometer is available in two versions - as RMD Pro with all functions and as more economical RMD. The RMD can be subsequently upgraded with the Pro functions. For this purpose, please order upgrade kit article number 814403. You can perform the upgrade yourself. It is not necessary to send in the device. We would be pleased to perform the upgrade during the annual recalibration.


Spectral range UVA, UVA+, UVBB
Measurement range, typ. 0 - 10 W/cm²
Resolution 0,001 µW/cm²
Spectral range UVB, UVC, VISB, VISBG
Measurement range, typ. 0 - 1 W/cm²
Resolution 0,001 µW/cm²
Spectral range UVC (for occupational safety
  detection), erythema+UVA
Measurement range, typ. 0 - 10 mW/cm²
Resolution 0,001 µW/cm²
Dose range 0 - 100 MJ/cm²
Illumination meas. range 0 - 500.000 lx
Resolution 0,001 lux
Dynamic range up to 107
AD conversion 24 bit
Temperature sensor integrated
Dimensions Ø 40 mm, h 35 mm
Optical area Ø 6 mm
Weight 160 g
Connecting cable 2 m
Operation temperature 0 to 60 °C
Storage temperature -20 to 60 °C
Humidity < 80% non-condensing

The specified measuring ranges are our recommended measuring ranges. These can be adapted to customer requirements. Please ask us for this or specify it when ordering.