User Panel
User Panel
User Panel
|
Posted: 4/25/2014 3:16:47 PM EDT
[#1]
Depends a lot on the concentration they use, and how much total mass of tritium makes it into the paint.
My factory Glock night sights have lasted roughly ten years before I felt they needed replacing, but that may be totally unrelated to how much tritium makes it into an ACOG. |
|
|
|
Posted: 4/25/2014 3:19:28 PM EDT
[#2]
tritium half life is 12.3 years.
|
|
|
|
Posted: 4/25/2014 3:19:42 PM EDT
[#3]
IIRC Tritium has a half life of 12 years.
|
|
|
|
Posted: 4/25/2014 7:28:44 PM EDT
[#4]
Thanks for the info guys.
|
|
|
|
Posted: 4/25/2014 7:35:36 PM EDT
[#5]
Considering a model with the fiber optic? That fiber optic is pretty damn effective.... You probably won't notice the dim tritium unless you're in a dark building 3,000 miles from civilization on an overcast night during a new moon.
|
|
|
|
Posted: 4/25/2014 7:42:25 PM EDT
[#6]
Quote HistoryQuoted:
Depends a lot on the concentration they use, and how much total mass of tritium makes it into the paint. What paint? The tritium is a gas kept in a pressurized glass vial coated internally with phosphorus. OP: They become less than ideal to use in 10-15 years. The green ones tend to remain useful longer it seems, probably because your eyes can see it better. |
|
|
|
Posted: 4/25/2014 8:10:45 PM EDT
[#7]
Quote HistoryQuoted:
tritium half life is 12.3 years. Even if you assume that the light output is half its original amount when the tritium has decayed to half its original amount, the perceived brightness is still considerably more than half the original perceived brightness. Perceived brightness is more of a logarithmic function than an linear one: A 50 percent reduction in light output power is barely noticeable to the human eye. |
|
|
|
Posted: 4/25/2014 8:14:21 PM EDT
[#8]
Quote HistoryQuoted:
Even if you assume that the light output is half its original amount when the tritium has decayed to half its original amount, the perceived brightness is still considerably more than half the original perceived brightness. Perceived brightness is more of a logarithmic function than an linear one: A 50 percent reduction in light output power is barely noticeable to the human eye. Quote HistoryQuoted:
Quoted:
tritium half life is 12.3 years. Even if you assume that the light output is half its original amount when the tritium has decayed to half its original amount, the perceived brightness is still considerably more than half the original perceived brightness. Perceived brightness is more of a logarithmic function than an linear one: A 50 percent reduction in light output power is barely noticeable to the human eye. And I agree. I have a 1911 with tritium mepro sights that is ten years old and the sights are still extremely visible. |
|
|
|
Posted: 4/25/2014 8:16:19 PM EDT
[#9]
The serial number can be used to determine when it was built.
|
|
|
|
Posted: 4/25/2014 8:16:37 PM EDT
[#10]
Quote HistoryQuoted:
Considering a model with the fiber optic? That fiber optic is pretty damn effective.... You probably won't notice the dim tritium unless you're in a dark building 3,000 miles from civilization on an overcast night during a new moon. Yup. I have a Minicog TA45 that the tritium is mostly dead in. It barely glows at night when there's very little ambient light. However, during the day or on a fairly good night; it'll still glow at a comfortable setting. |
|
|
|
Posted: 4/25/2014 8:20:49 PM EDT
[#11]
Quote HistoryQuoted: Considering a model with the fiber optic? That fiber optic is pretty damn effective.... You probably won't notice the dim tritium unless you're in a dark building 3,000 miles from civilization on an overcast night during a new moon. +1, those fiber optic tubes are like fucking vacuum cleaners sucking up photons and throwing them at you like an angry monkey with a handful of poo. But with less mess.
 |
|
|
|
Posted: 4/25/2014 8:26:11 PM EDT
[#12]
The correct answer is 87 years of course.
|
|
|
|
Posted: 4/25/2014 8:29:10 PM EDT
[#13]
Quote HistoryQuoted:
Depends a lot on the concentration they use, and how much total mass of tritium makes it into the paint.  No dude. Tritium is in a vial.
|
|
|
|
Posted: 4/25/2014 8:40:43 PM EDT
[#14]
Overall optic - great. Fiber Optics - great. Tritium - almost useless even when brand new. I would be equally happy with mine if the tritium was dead.
|
|
|
|
Posted: 4/25/2014 8:44:22 PM EDT
[#15]
Quote HistoryQuoted:
Considering a model with the fiber optic? That fiber optic is pretty damn effective.... You probably won't notice the dim tritium unless you're in a dark building 3,000 miles from civilization on an overcast night during a new moon. Truth. And 9 times out of 10 when you can see the glow, it's too dark to see WTF you're aiming at anyway
ACOG are still awesome sights 
|
|
|
|
Posted: 4/25/2014 8:50:02 PM EDT
[#16]
Quote HistoryQuoted:
Overall optic - great. Fiber Optics - great. Tritium - almost useless even when brand new. I would be equally happy with mine if the tritium was dead. This. My TA33 was a superb optic. I sold it and went to a variable. But in some ways I miss the ACOG. |
|
|
|
Posted: 4/26/2014 7:51:07 AM EDT
[#17]
Quote HistoryQuoted:
What paint? The tritium is a gas kept in a pressurized glass vial coated internally with phosphorus. OP: They become less than ideal to use in 10-15 years. The green ones tend to remain useful longer it seems, probably because your eyes can see it better. Quote HistoryQuoted:
Quoted:
Depends a lot on the concentration they use, and how much total mass of tritium makes it into the paint. What paint? The tritium is a gas kept in a pressurized glass vial coated internally with phosphorus. OP: They become less than ideal to use in 10-15 years. The green ones tend to remain useful longer it seems, probably because your eyes can see it better. Thanks. |
|
|
|
Posted: 4/26/2014 7:54:06 AM EDT
[#18]
Quote HistoryQuoted:
Truth. And 9 times out of 10 when you can see the glow, it's too dark to see WTF you're aiming at anyway
ACOG are still awesome sights Quote HistoryQuoted:
Quoted:
Considering a model with the fiber optic? That fiber optic is pretty damn effective.... You probably won't notice the dim tritium unless you're in a dark building 3,000 miles from civilization on an overcast night during a new moon. Truth. And 9 times out of 10 when you can see the glow, it's too dark to see WTF you're aiming at anyway
ACOG are still awesome sights You don't want to go down that clusterfuck of a road.
|
|
|
Win a FREE Membership!
Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!
You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.
AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types.
From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm.
Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more.
Copyright © 1996-2024 AR15.COM LLC. All Rights Reserved.
Any use of this content without express written consent is prohibited.
AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own.
