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  • xrayxray2003
    anyone know where i can get up to date MVB info? what s the best UVB meter?
    Message 1 of 2 , Jul 1, 2008
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      anyone know where i can get up to date MVB info?

      what's the best UVB meter?
    • lilacdawndragon
      Hi, XrayXray2003 (please sign your emails, so we have at least a name for you :) ) There are a large number of mercury vapour lamps now on sale across the
      Message 2 of 2 , Jul 1, 2008
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        Hi, "XrayXray2003"
        (please sign your emails, so we have at least a name for you :) )

        There are a large number of mercury vapour lamps now on sale across the
        world; have you any brands in particular you'd like to know about? What
        country are you from?

        The best UVB meter depends on exactly what you want it for.

        Most people keeping reptiles find a Solarmeter 6.2 ideal for checking
        the output of their lamps and monitoring their longterm decay. It has
        proven sturdy, reliable, and has the best resolution (down to 1 uW/cm2)
        of any affordable hand-held scientific instrument. Also, over the last
        few years quite a large database of information has built up of
        readings taken with this instrument for almost all reptile lamps
        currently on sale, so you have a good way of checking how your sample
        compares with others of that brand.

        However, if you are interested in comparing lamps one brand against
        another, or with the sun, or researching what UVB reptiles get in the
        wild, then this may not be the meter for you. Like all broadband UVB
        meters, it takes in the whole UVB range and the upper UVB wavelengths,
        included in the reading, are not relevent for vit D3 synthesis. Their
        inclusion also means that the SPD (spectral power distribution) of
        different brands of lamp, and the sun, may be quite different. 100
        uW/cm2 from one lamp will not have the same vit D3-producing ability as
        100uW/cm2 of a different brand or type. So one cannot use this meter to
        compare one brand with another, except in the most general terms.

        Recent research has shown that one very good way of doing this is to
        measure the UV Index of the light from a lamp or the sun, and a paper
        recently appeared in the Chicago Herp Bulletin describing the
        Solarmeter which measures UV Index (Solarmeter 6.5) and one the
        readings from which can be converted to UV Index by multiplying by a
        correction factor (the Solarmeter 6.4). The researchers showed that the
        UV Index readings from these Solarmeters are also a good indication of
        the ability of any lamp (regardless of brand or type) to enable vitamin
        D3 production.

        The only problem with these meters is that the amount of UVB radiation
        in the D3-producing wavelengths, from many lamps, especially
        fluorescent tubes, is so small that it is really stretching the ability
        of any hand-held instrument to register it. Hence with these types of
        lamp, readings with a Solarmeter 6.5 at basking distances may wobble at
        the sensor's limits (UV Index 0.1 - 0.2)

        UV Guide UK will shortly be changing over its main focus to the
        reporting of the UV Index of all lamps and the sun, using the
        Solarmeter 6.5.
        However, only a handful of people in the reptile world own these, so UV
        Guide UK will still provide readings of the Solarmeter 6.2 since this
        is very widely used worldwide by hobbyists, zookeepers, vets and
        researchers in the field. However, I believe the UV Index meter will
        soon come into its own.

        Hope that helps!

        Frances Baines
        www.uvguide.co.uk





        --- In UVB_Meter_Owners@yahoogroups.com, "xrayxray2003" <xrayxray@...>
        wrote:
        >
        > anyone know where i can get up to date MVB info?
        >
        > what's the best UVB meter?
        >
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