UVA 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 320 – 400 nm
  • Measurements are shown in mW/cm2
  • Supplied with a certificate of calibration

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

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.

5 in stock (can be backordered)



The sensor consists of a GaAsP photodiode and a UV filter. It is completely insensitive to visible light longer than 400 nm and infrared radiation, because its spectral response only covers the UVA region from 320-400 nm.


To operate your UV irradiance meter, aim the sensor window located on the top panel of the meter directly at a UV source. Press and hold the push-button switch on the face of the meter. For best results take note of the distance the reading was taken from the UV source in order to ensure repeatable results. Battery operation voltage is viable from 9V down to 6.5V. Below 6.5V, the numbers on the LCD display will begin to dim, indicating the need for battery replacement. Under typical service load, a standard 9V battery will last approximately 2 years.

Proper Usage

  • Wear eye protection when checking UV lamps (glasses that provide wrap around protection are ideal).
  • Allow lamps to warm-up prior to taking readings (at least 5 minutes).
  • When checking lamp aging, make sure to use the same location and distance to ensure accurate readings.
  • For curing lamps, hold the meter at the distance you intend your work piece to be cured.
  • For acrylic testing, take readings with and without acrylic at a fixed distance.
  • When comparing different types of lamps consider readings to be relative rather than absolute.
  • Lamps that peak near 365nm (newer designs) will read higher than lamps that peak near 350nm.
  • Do not subject the meter to extremes in temperature, humidity, shock or dust.
  • Use a dry, soft cloth to clean the instrument. Keep sensor free of oil, dirt, etc.
Irradiance range
0-199.9 mW/cm²
320-400 nm
0.1 mW/cm²
Conversion rate
3.0 readings/sec
3.5 digit LCD
Digit size
10.2 mm high
Operational temperature
0°C to 37.8°C
Operational humidity
5% to 80% RH
±10% REF. NIST
106.7 mm (L) x 61 mm (W) x 22.9 mm (D)
128g Including battery
Power source
9-Volt DC battery
UV glass
CE Mark


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.