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UVA Meter Solarmeter Model 4.0 Standard

SKU: 810705

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Short Description

Solarmeter 4.0

  • Compact

  • Handheld

  • Durable

  • Simple Single-Button Operation

  • NIST Traceable Accuracy

  • LCD Display

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Solarmeter® UVA Meter Model 4.0 Standard

Portable Digital UVA Radiometer with Integral Sensor

Monitoring UV Lamp Intensity and Aging
Outdoor UVA Measurement
Acrylic Shield Transmission Testing
Glasses UVA Blocking Capacity Testing
Window Film/Tint Transmission Testing

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

Meter Operation
To operate your Solarmeter, point the sensor window located on the top panel of the meter directly towards a UV source. Press and hold the button switch on the face of the meter. The reading represents IU/min D3 over 10% of body surface area.
The battery operating voltage range is viable from 9V down to 6.5V. Below 6.5V, the numbers on the LCD screen will start to dim, indicating the need to replace the battery. Under typical service load, a standard 9V battery will last approximately 2 years.

Proper Use of Solarmeter® Ultraviolet Radiometer
• Use eye protection when checking UV lamps. Wrap-around protective glasses are ideal.
• Allow lamps to warm up before taking readings (at least 5 minutes).

Lamp Aging
• When checking lamp aging, make sure to use the same location and distance to ensure accurate readings.
• Lamps should be replaced when output drops to approximately 70% of their original (new) readings.

Curing Lamps
• For curing lamps, hold the meter at the distance you intend for your workpiece to cure.

Tanning Lamps
• To take a general reading in the center of the tanning bed, place the meter pointing upwards with the cover closed.
• To take readings of individual lamps, hold the meter against the acrylic with the cover open.
• This meter is "seeing" the "tanning" UVA rays. For erythemal readings, use the Model 7.0 MED/hour meter.

Acrylic Testing for Tanning Beds
• For acrylic testing, take readings with and without acrylic at a fixed distance.
• When comparing different lamp types, consider that readings are relative rather than absolute.
• Lamps that peak near 365nm (newer designs) will show higher readings than lamps that peak near 350nm.

• Do not expose the meter to extremes of temperature, humidity, shock, or dust.
• Use a dry, soft cloth to clean the instrument. Keep the sensor free of oil, dirt, etc.

solarmeter 4.0 spectral response

Solarmeter Specifications




Irradiation Range

0-199.9 mW/cm² UVA


320-400 nm UVA


0.1 mW/cm²

Conversion Rate

3.0 Readings/sec


3.5 Digit LCD

Digit Size

0.4 (in) / 10.2 (mm) high

Operating Temperature

32°F to 100°F / 0°C to 37.8°C

Operating Humidity

5% to 80% RH


±10% REF. NIST


4.2L x 2.4W x 0.9D (in) / 106.7L x 61W x 22.9D (mm)


4.5 (oz) / 128 (g) Including Battery

Power Source

9 Volt DC Battery


UV Glass



Agency Approval

CE Mark

Additional Information

Additional Information



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