What is the threshold for the test?
772497
IDK. My daily intake at time of first positive test was 1-3 cigarettes and a couple of small portions of chew tobacco (snus). I assume threshold is pretty low. I would like to see how long I have to quit to get a negative result, but haven't much felt like it.
772498
Not sure. Like I said in a previous answer- I had my husband take the test who is a regular daily smoker and he tested negative the next day- which according to the literature online from lab resources- he should have been positive. Most on the lab resource literature states that a smoker should not smoke for 7-10 days for a clean urine test and that sometimes is could be up to 30 days. Having said that- the cartridges that I had were faulty due to the next day negative test and therefore unreliable.
941151
Yes, there's a little pamphlet in the package that specifies that these test for 50 ng/mL which is was the standard 10 panel tests for.
2188099
According to operation manual : 1% in range 400 - 4MOhms and 2% in range 4M-40MOhm.When measuring low resitance, the test leads can add 0.2 Ohm or more of error to resistance measurement.Try to short the test leads and press REL button, to subtract the residual resistance of the test leads.In my opinion if you really need best precision you will need a bridgemeter, more expensive!!!By the other way, you can mount a simple circuit using a power supply in series with the resistance and an ampmeter or a precision resistance , measuring the voltage over the resistances, and apply the Ohms law, dividing de voltage by the amperage, until obtaining the resistance desired. According to operation manual : 1% in range 400 - 4MOhms and 2% in range 4M-40MOhm.When measuring low resitance, the test leads can add 0.2 Ohm or more of error to resistance measurement.Try to short the test leads and press REL button, to subtract the residual resistance of the test leads.In my opinion if you really need best precision you will need a bridgemeter, more expensive!!!By the other way, you can mount a simple circuit using a power supply in series with the resistance and an ampmeter or a precision resistance , measuring the voltage over the resistances,... » Read More According to operation manual : 1% in range 400 - 4MOhms and 2% in range 4M-40MOhm.When measuring low resitance, the test leads can add 0.2 Ohm or more of error to resistance measurement.Try to short the test leads and press REL button, to subtract the residual resistance of the test leads.In my opinion if you really need best precision you will need a bridgemeter, more expensive!!!By the other way, you can mount a simple circuit using a power supply in series with the resistance and an ampmeter or a precision resistance , measuring the voltage over the resistances, and apply the Ohms law, dividing de voltage by the amperage, until obtaining the resistance desired. « Show Less
2208274
This strength is 5000, an amount recommended by my doctor after he determined what I needed via a blood test. I'd check with your doctor.
1570636
Hey Katie! There should be a card with "norms" on it for various ages and genders. You can use those numbers to let them know if they need to strengthen or if they are at or above average!
1441228
Yes. You can read it in the bootle (Amazon Picture). "Standardized to 80% "
1729423
Just look at the size of the box or at the container holding the test strips - usually it is about 17 months or less depending on when you purchased the product. If you are testing more than once a day, you will use the strips before the expiriation date.
65953
Hi, I'm not sure...I had 20 in mine when I received the tests. Good question!...
311033
Yes, It Will Give You Results In PPM. Detection Range Is 0.05- 1.0 PPM. Thank You
915992
I'm not sure I purchased the product, it arrived in 2 days I took the test at 12 weeks. The text indicates I could take it as early as 10 weeks. This test was not correct I will never use it again
2257947
I think it's supposed to be some 500 but can't give you a definitive answer. Sorry.
2234611
I have used it at 425 and it did ok. I wasn't aware of its limits so will be more careful next time. I will probably just use it to stop check and not leave it in the oven.
390528
Per their website 25 miu http://www.clearblueeasy.com/advanced-pregnancy-test-with-weeks-estimator.php
2233788
I would think that +/- 7% is probably within the tolerance of the various components and you're running right at that limit. Yes, I think you should probably order up.
471249
I used a short term test like the one from First Alert to validate the readings in my basement and it came out accurate. Make sure that you carefully place the unit because placement can effect the readings. 25 is pretty high but certainly in the range of possible - don't ignore it !
1313537
I find it to be within five milligrams above or below the unit being measured. That is if you calibrate the scale with the proper test weights, use it where there is little to no interference, etc. However, I find it doesn't measure items unless they weigh at least 30 milligrams, yet air and other things seem to effect it somewhat. Its worth the 20 or so dollars, but don't expect anything above average out of this scale. Measuring out anything that is 30 milligrams seems damn near impossible.
1498111
It catches it pretty low. I had a miscarriage at 5 weeks 1 day and the ER test showed my level at 18 and these strips were picking it up.