RMD with UV sensor for surface disinfection measurements

The radiometer RMD is currently available in a special version to prove the effectiveness of UVC surface disinfection based on the Sars-CoV-2 virus disinfection, known as Coronavirus or Covid-19, and other microorganisms.

Coronaviruses require about 6 J/m² at low humidity to disinfect the surface (D90, source: “Ultraviolet Germicidal Irradiation Handbook”). The highest dose reported for viruses1 for a 6-log-step reduction is 235 mJ/cm².

We are happy to support all academic, industrial and medical customers with our measuring instruments. Therefore we offer the RMD with UVC UVGI sensor at a special price. In addition, we grant 40% discount on an accredited ISO 17025 / DAKKS calibration.

RMD 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.

Two UVGI sensors can be read out simultaneously. The measured data are clearly shown on the graphical display. For measurements of mercury low pressure lamps we recommend an UVV UVGI sensor. For measurements of the novel UVC LEDs we recommend an UVBB UVGI sensor to overcome the overlap of filter edge at 280 nm and emission at 275 nm.

Compared to the RM-12, the RMD features a significantly higher resolution of 24 bit, an extended measuring range of up to 7 orders of magnitude and dose measurement.
The device can be powered by a rechargeable battery or mains adapter and measures for up to 100 days at a time.
The RMD is upgradeable to the RMD Pro.



  • Measurement of UVC radiation
  • Measurement of UVC LEDs & UVC light sources
  • Dose measurement
  • Proof of UVC surface disinfection


Sensor connectors 2, fully digital, UVGI
Display graphical, 128 x 64 px
Display output 1 + 2 channels
Irradiance + Dose
Dimensions 160 x 85 x 35 mm
Weight 250 g


Spectral range 200 - 280 nm (UVC)
230 - 400 nm (UVBB)
Measurement range 0 - 100 mW/cm²
Resolution 0,001 µW/cm²
Dose range 0 - 100 MJ/cm²
Calibration UVC-LP 253,7 nm
  UVC medium pressure (alter.)
  UV-LED 275 nm (alter.)
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 40 °C
Storage temperature -20 to 60 °C
Humidity < 80% non-condensing


Calibration uncertainty 7,0% (k=2)
Linearity error < 1%
Ageing / year < 3%

1 Source: Fluence (UV Dose) Required to Achieve Incremental Log Inactivation of Bacteria, Protozoa, Viruses and Algae by Adel Haji Malayeri at al.