Akozon Digitales Luxmeter LX1330B LCD Display Licht Meter Lux Meter Photometer 0-200,000 Lux Testing Illuminometer 0,1-200/2000 / 20,000/200,000 Lux

Utilissimo e valido prodotto soprattutto nel mio lavoro

Ce luxmètre suffit parfaitement pour une approche "non certifiée" du facteur d'éclairement dans une pièce. il n'y a pas de house de maintien "dans la boîte" en plastique rigide, celle-ci prend un peu de place, l'appareil se balade dedans, de plus elle fait un peu chip. Il est préférable d'acheter un étui de rangement rigide à part qui permettra une meilleur protection et un meilleur maintien de l'appareil et de son capteur.NOTA :Il faut appuyer plusieurs fois sur le bouton de sélection pour obtenir le bon réglage de valeur de lecture, sinon cela peut porter à confusion.Il faut aussi penser à acheter une pile lithium pour avoir de bonne autonomie d'utilisation pour ce type d'appareil.Bon Rapport/ Qualité/Prix utilisation en usage semi-professionnel.

This light meter is sold under several different brand names and prices on Amazon, and many more brand names and prices on other online selling platforms. I don't know who actually makes it, and neither the meter itself nor its user guide have any information on this. The only sure thing is that it is made in China. Thus, once you decided to purchase one of these meters, you should do your window shopping and choose the lowest price among the brands/sellers in your region that sell this same model.My specimen came in a cheaply made but relatively strong carrying case, which is good to have since the meter is actually made in two parts (control, display and battery in one, sensor in another) permanently joined together by a spiral cable. It is possible that other sellers do not provide this case. For example, I own a digital thermometer which was obviously made in the same factory (same size and color, same orange protecting sleeve down to details like the notch for the cable, in spite of the thermometer not having a cable in the same position) and this instrument did not come with a carrying case.The design in two separate units makes sense to increase your choice in positioning the sensor with respect to the display. The lack of an unpluggable connector on the cable joining the two units is an obvious cost-cutting feature, and this gets the meter half a star less in my review.The meter loses another half star in my review because its sensitivity varies wildly within the VIS range, from a peak at 545 nm down to 50% less at 515 and 620 nm. Thus, this meter cannot give reliable readings when comparing light sources of different color temperature and spectral composition. This fact is documented with a spectral sensitivity diagram in the user guide, although the implications are not discussed. The diagram also shows two different curves, one of them identified as "LIGHE METER", the other nameless. It is anybody's guess what this means.The sensor is covered by an opal plastic hemisphere that works as a diffuser, not as precise as a real cosine corrector, but the meter's sensitivity does not change much with small changes in orientation toward the light source (the difference may matter in precision measurements, though).Readings can be made in lux or foot-candle, and in four decade ranges of both these units. A peak-hold mode is available, with measurement windows of 100 ms (too long for xenon strobe, so this meter is only usable for continuous light sources), and a data-hold mode that freezes the last measurement.The user guide contains a note saying that the meter requires recalibration in the long term, so without access to a standard intensity light source this meter can only be used reliably for comparing light sources side-by-side during the same test session, rather than comparing absolute luminosity recorded at substantial time intervals. Meter temperature and battery status likely affect the readings precision, in addition to source spectral emission as noted above.

Accurate great piece of kit for a reasonable price

Perfecto!!!