NIST SRM 930e Glass Filters Neutral Density 10, 20, 30 Reference Material

Description

NIST SRM 930e Glass Filters Neutral Density 10, 20, 30 Reference Material
NIST SRM 930e Glass Filters Neutral Density 10, 20, 30 Reference Material
This set is in excellent condition, with all four components showing no damage. These are considered non-perishable, and do not require calibration, but should be certified for certain applications.
There are two sets available. The filters in one are marked 10-2203, 20-2203, and 30-2203. The other set's filters are marked 10-2208, 20-2208, and 30-2208.
This Standard Reference Material (SRM) is a primary transfer standard certified using a national reference spectrophotometer at NIST [1-3]. It is intended for use in the verification of the transmittance and absorbance scales of spectrophotometers in the visible spectral region. SRM 930e is a set consisting of three individual glass neutral density filters in separate metal holders and one empty filter holder. The exposed surface of the glass is approximately 29 mm x 8 mm, measuring from a point 1.5 mm above the base of the filter holder (see Figure 1). The filter holders are provided with shutters that protect the glass filters when not in use. Each filter-containing holder bears an identification number for the set and individual filter numbers (10, 20 or 30), which correspond to the nominal percent transmittance (100 x transmittance) of each filter.
Frequently asked questions
How are you?
About the same, thanks for asking.
So what's included in your listing?
Everything you see in the pictures and nothing you don't.
What about the white backdrop? Is the white backdrop included?
No.
How about…
No, anything you see reflected in the shiny surfaces is not included either. Sheesh.
Anything else?
I'll throw in a box.
Oh, a smart guy, eh?
In case that's not rhetorical: I'm no expert, and I'm certainly not smart enough to know about everything that passes my way. I do my best to evaluate the things I sell, but often defer to the superior knowledge of the prospective buyer.
Will you ever learn?
Probably not.
What’s with your hair?
Um…wait, what?
What if the item I buy from you doesn't work?
You have 30 days from receipt to return it for a refund if it doesn't do as I describe.
What if I don't like the color?
Then you have 14 days.
If I tell you how crappy and obsolete your item is in a condescending enough tone, will you do me the favor of selling it to me for a fraction of your asking price?
You sure know how to butter a guy up. No.
I didn’t bother to read your description. Can you fill me in on the details?
Sure. Send a stamped self-addressed envelope to: mehoff58, c/o eBay, Internet.
Can I pick up my winnings in person?
I don't know you well enough to know your capabilities.
OK, may I?
Certainly!
I need your item, so lower your price.
Not really a question. Nope, not a question at all.
I bought this gadget from you 5 months ago and just found out it doesn’t work. Will you refund my money?
30 days is my limit. I can’t afford to keep large stores of cash handy for long warranties on used equipment. Besides, I don’t know how you stored it or handled it or if it was damaged in shipping. Anyway, no.
Did I forget anything?
What am I, a mind reader?
Will you discuss these imaginary conversations with your psychiatrist?
The conversations are quite real, it's you who are imaginary.
You just blew my mind.
Who said that?
I live overseas. Will you declare the value as 10% of the selling price?
No, and I’ll tell you why. Consider these three scenarios:
Scenario one: I agree to declare a lower value as a personal favor to you, a complete stranger. A few days after shipping, I get a call from US Customs asking all kinds of questions about the value of the item, to whom I am sending it, etc. I’m not a good liar.
Scenario two: I agree to declare a lower value as a personal favor to you, a complete stranger. The package gets lost in transit. You go through eBay to get all your money back from me. I’m stuck with a paltry settlement from the USPS.
Scenario three: It’s fraud.
I hope this explanation has been helpful.
Have you changed your privacy policy?
Seriously, who said that?
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