UVC Irradiance Meter


NIST traceable, hand-held UV light irradiance meter with an integral sensor. Compact and durable for single-handed use.

  • Measure UV in the wavelength range of 246 – 268 nm
  • Measurements are shown in mW/cm2
  • Supplied with certificate of calibration

Typical applications include monitoring drop off of UV bulbs and tubes and transmission testing of PPE, screens and guards.

Please note this meter should not be used for checking occupational UV light exposure, please contact us if you are looking to make health and safety measurements.

4 in stock (can be backordered)



  • Measurement of UVC irradiation level to determine the time to achieve a dose necessary to inactivate (kill) specified micro-organisms.
  • Monitoring drop off of UVC light irradiance during the operating life of UVC germicidal bulbs and tubes.


The sensor consists of a Silicon Carbide (SIC) photodiode chip and a UV filter. It is completely insensitive to UV and visible light longer than 280 nm and infrared radiation. The meter’s spectral response only covers the UV region from 245 – 270 nm.


To operate your UV meter, aim the sensor window located on the top panel of the meter directly at a UV source. Press and hold push-button switch on the face of the unit. Aim sensor window in the top panel of meter directly at UV source. Note reading on LCD and record if required.

The battery operation voltage is 9V down to 6.5V. Below 6.5V the LCD numbers will begin to dim, indicating the need for a battery replacement. Under “typical” service load, the battery should last about 2 years.

  • Wear eye and skin protection when checking UV lamps (a face shield that provides wrap-around protection is ideal).
  • Allow lamps to warm-up prior to taking readings (at least 5 minutes).

Additional information

  • When comparing different types of lamps consider readings to be relative rather than absolute.
  • Lamps that peak near 255 nm (newer designs) will read higher than lamps that peak near 265 nm.
  • Do not subject the meter to extremes in temperature, humidity, shock or dust.
  • Use a dry, soft cloth to clean the instrument. Keep the sensor free of oil, dirt, etc.


Measurement unit
UV spectral response
246 – 268 nm
Peak response
250 – 260 nm
Measuring range
0 – 19.9 mW/cm2
Display graduation
0.1 mW/cm2
3.5 digit LCD
128 g
105 mm x 60 mm x 3 mm
Operating temperature range
0 – 37oC
Operating humidity
5 – 80 & RH
Power supply
9 V battery
GaAsP photodiode
+ / – 10 % Ref NIST
Calibration interval
6 – 12 months depending on usage


UV Safety in the Workplace webinar

This interactive webinar runs through the key considerations for assessment and control of UV light exposure at work in accordance with statutory regulations.

By the end of it you should know what actions need to be taken by your organisation to ensure safe use and compliance with your legal obligations.