The Model 6.5 features an Integral Sensor and applications include UV Index, sun output, sun exposure awareness, educational applications and school learning programs.

The Model 6.5 UV Index is recommended for use by ARPANSA (Australian Radiation Protection and Nuclear Safety Agency).

Specifications Radiometer
Model 6.5
Irradiance Range 290-400 nm Diffey EAS
Peak Sunlight Response 290-298 nm
Resolution 0.1 UVI
Conversion Rate 3.0 Readings/Sec
Display 3.5 Digit LCD
Operating Temps 0° C to 40° C
Operating Humidity 5% to 80% RH
Accuracy ±10% REF.NIST
Dimensions (LxWxD) 10.5 x 6 x 2.2 cm
Weight 110 Grams
Power Source 9-Volt DC Battery
Lens Silicon Carbide (SiC) Photodiode
Diffuser Virgin Teflon .005


To enquire on the the Model 6.5 please click on the link below or use the contact page.

When requesting a quote please provide quantity and suburb/state for postage/delivery details.


Silicon Carbide (SiC) Photodiode packaged on gold plated header via gold wire bonding under UV glass window cap, hermetically sealed. Filter: Metal Oxide Eeff (erythemally effective) and teflon diffuser cap. 

Proper usage of Solarmeter ® Ultraviolet Radiometer for Outdoor UV Index Measurement

The instrumentation used to measure UV index for the U.S. E.P.A./NWS program is directed toward the sky in a global normal (perpendicular to level ground) inclination.

Therefore the Solarmeter® Model 6.5 is designed to operate in the same fashion. Solar irradiance measured this way includes direct (reduced by cosine law depending on solar zenith angle) plus diffuse (diffused by the atmosphere).

This vertical (global) reading represents an average intensity value your body will experience while being active on a tennis or volleyball court, or lying flat on a blanket on the grass. If however, you are reclined in a lounge chair facing the sun perpendicular to the sun angle, you will experience a higher UV intensity, as represented by pointing the Solarmeter ® directly at the sun. This value will typically exceed the actual UV index number.

To obtain the UV index instantaneous value, the following instructions will provide the most consistent, accurate results:

Stand clear of buildings, trees, etc. to obtain a "full sky" field of view.

Hold the meter vertical out in front of your body.

Press and hold button on front of meter case.

Note reading on LCD. This value represents the instantaneous UV index.

The highest UVI values typically occur when the sky is a deep blue colour, and sometimes when the sun is between scattered white "puffy" clouds. Take extra precaution under these conditions to reduce sunburn potential.

Note that various cloud and haze conditions reduce the UV index. When partly cloudy, take readings often and average clear with cloudy readings to correlate with actual UV index. Take care in hazy or slightly overcast conditions because although the direct UV reads less than when sky is clear, the diffuse UV can be higher as seen by pointing the meter in various directions.

Interpretation of UV index Relative to Proper Precautions

There are six (6) skin types that range from low UV tolerance to high UV tolerance. They are described here: If unsure, consult your physician to determine skin type.

For Type II untanned skin the time to beginning of sunburn, one minimal erythemal dose (MED) at 210 J/m² per MED, can be calculated from the UV Index reading as follows:

Divide the UVI by 2.33 to get MED/hr. Then divide MED/hr into 60 minutes.

Example for an 8.5 UVI reading: 8.5 / 2.33 = 3.65 MED/hr. Then 60 / 3.65 = 16.4 minutes. Since minutes to burn for previously unexposed Types I and II are so short, these types should exercise caution iven at moderate UV index levels.

Among the outdoor variables affecting UV intensity are:

  • Seasonality/Sun Zenith Angle

  • Location/Latitude/Geography

  • Reflective Surroundings

  • Altitude

  • Weather conditions

  • Ozone Layer Thickness

By regularly using the Solarmeter® you will become very informed of damaging UV levels in many and varied conditions. This knowledge, along with following the outdoor precautions mentioned above, should help enable you to avoid sun damage.