Here in France "Rougier et PlĆ©" sell the 20cm for 5ā¬ and 30cm for 10ā¬, thickness is about 24mm for both.
They have an online shop but i don't know if they sell abroad
Thanks djozz! Sounds really great!
Hope to get into town in the next few days. I do not think that they have 50cm spheres in stock but 30 or 40cm is possible. 40cm would be a good size (would fit on the wardrobe in the bedroom for storage).
I can confirm I received a ābadā black top TA8133 inside the packaging for a good one from this seller. It seemed to be working reasonably well during informal tests, but my calibrated BLF-348 read extremely low. I did some further testing and discovered under about 60 lux (from my known āgoodā HS1010A) the reading is fixed at about 19.6 lux. Seriously :person_facepalming: Above 85 lux it becomes reasonably linear with the HS1010A, but continues to rise. It can also be exceedingly slow to settle on a measurement.
Iām pretty curious how my HS1010A stacks up to a nice lux meter. Itās cheap, but I havenāt really had any issues with it except maybe an affinity for cool white.
The reading will be at least lineair with the light output, this downgraded Tasi is the first luxmeter that I have seen that has a linearity problem :person_facepalming:
Phew, fortunately I bought the 632A. TASI has all your needs from the better to the worse version :laughing:
- Clemence
Filed a dispute on AE, seller indignantly responds they sell ā8133ā and if I donāt want it, I can pay return shipping because itās my problem.
By the time I see this thread, I have already ordered a 8132, but judging from the product photos, it has a red top. Letās see what Iāll receive in the mail. It isnāt a very big deal if I get a ābadā one as I bought it for very cheap.
I just got my 8132, it turns out to be a āred topā, but weirdly enough the red color of the top (and the power button) is more of a darker deep red compared the the bodyās red. The display looks like the less green one in the āgood oldā 8132 in #2. I donāt have any other tools that can be used to verify the accuracy of this meter, I guess I can only hope that itās accurateā¦ 
What you can do is to see if it displays 0 lux with some light, mine started to display more than 0 only around 65 lux wich is enough to read a book.
You can watch Djozz's video showing how to test it
I just did a quick test using my adjustable desk light, it reads 18 lux on my lightās lowest brightness.
Edit: I used Djozzās method to test it, it reads as low as 1 lux, thatās interesting.
The bad luxmeter had several problems :
- reading 0 until 60-70 lux and seemingly non linear reading after that
- wrong response curve (the difference between a good luxmeter and the bad one was different depending on the light "color")
According to what the seller told me Tasi was admitting that there was something wrong with a whole batch (first batch new design ?) but that they were going to solve it.
0 and non linear readings should be easy to solve for Tasi (programming parameters) but i doubt then can change the response curve without replacing the filter and/or sensor.
Maybe yours is from the "new fixed" ones. That would good news but we still have to see if the response curve is correct
It is red top, thusfar it seems those should be good.
Tasiās story of a bad batch is complete crap, those blacktops have dozenās of design changes for the worse, that is not a mistake, that is intent. The next batch will not have all that reversed because someone on BLF found out what they did. They cheaped the design and then make up a story.
Iām not sure if anyone elseās meter comes with this booklet. It shows the spectral sensitivity of the meter. It might be a useful reference.
They changed the sensor and filter and did not change the calibration accordingly : that was big a mistake (they call it bad batch) but that one should easily be solved as long as the calibration parameters can be reprogramed
I agree that it won't solve everything but at least it should make the new 8133 as usable as any cheap luxmeter (while the old was pretty good)
That graph does not match what I found in the OP, it would be a better luxmeter if it matches this graph. It is probably because Tasi measures the wavelength in nonometets.
The Chinglish thing is hilarious 
Going to resurrect this thread.
Was wondering if anyone has run into other meters which have similar custom calibration ability like the Extech LT45 but at a cheaper price?
Hello, everyone. This is my first post in the forum 
Iām also looking for my first light meter.
Already made one styrofoam integration sphere and tried to measure some Phillips lamps with a Canon EOS 50D from RAW data :D. But thatās another long story.
Iām currently aiming for a relative consistency measurements between the lights. And later I will try to use absolute djozz-lumens
Obviously, it is much easier if you have a dedicated (dedomed) lux meter for the sphere.
So, I have contacted all stores (6-7) currently selling Tasi 8133 on Aliexpress, asking them which version they have. Some like frank hu, honestly reply they have only the black one.
Still, one replied that they have the red-capped one and sent me a picture. The store is Ali World Shopping Center.
So I want to ask you:
1.Has anyone bought a bad TASI 8133 from this shop?
2.Are the serial numbers the same on all TASI 8133, good or bad ones? (Iāve seen products from China with a single serial number for all units in a batch before)
3.What is your TASI 8133 serial number, djozz? The one on this picture seems to be 16303260(?).
Notice the darker red color of the cap. Is this normal?
4.I will probably buy one more cheap meter to have as a backup, if the TASI is totally screwed. Has anyone bought any of these:
TL-601
TES-1332A
Thank you for your time!