Test is not like the other perameter tests
340170
Test is done by putting in drops till color changes,in my oppinion its not very conclusive
4233146
My wife, "I gave it two stars because it was kind of helpful but not what I expected.  It gave me a chance to do more practice questions which was great.  However, it is set-up weird and nothing like the actual test. First, it's only one full exam test (one reading, one math, one writing section) and I thought it was going to be two full exams. So it's over priced for only being the one. You actual have to purchase AGAIN, the other part, part #1.

The reading section is only 40 questions not 50 like the real test.  Then there is a writing section after the reading that has to do with grammar and punctuations, which isn't even on the real exam. I skipped that part. The math section is only 40 questions not 50 and it doesn't start over with number 1,  it starts where the other questions left of on 79. Which is no big deal but a little annoying to me. Lastly, the the writing is only 1 essay questions not two essay questions.

Overall it was great to have extra questions of the practice but not what I expected. Not sure I will be purchasing the other part for that price.
4873775
Looks like this is the old version. This one is much easier than the one now. So do not waste your money buying this test.
4787380
Very inconsistent. There were times when it was spot on but at least half of the time it was 50+ yds off. My friend had the exact same one and we could be standing right next to each other and get two totally different readings.
978302
I gave this to a friend automobile repairer. I hope to order a different kind of tester in future
2377478
I have been using test kits for many years and this one by far is the worst one I have ever used. The test tube that is supposed to filter the water in order to run the test, broke on the very first test with very little pressure applied. The filters are too thick and will not allow plain water pass through, much less filter the water from the soil.
49815
Thids didn't work as well as the competitor Bondit.  It dries clearer, but the blue light did not "cure" the bonding agent completely. It does finish curing over a 24 hour period, but that's not the claim made in the pitch. I'll buy  the competitor next time around.
280752
I bought this hoping to use it for quick validation of lighting design. After getting measurements which were fairly consistently ~40-50% below my calculated values, I bit the bullet and bought a more expensive Extech meter with NIST certificate. The Extech was giving readings quite close to the calculated (expected) values.

For the record I attempted new batteries. I was unable to locate any info on how to calibrate the meter.
4348701
My Extech 445815 hygrometer is not accurate.  I ran this meter through the standard salt humidity test before I used it.  I tested it along with a few other hygrometers that I had on hand.  The salt test creates a stable known humidity in a sealed container.  An accurate hygrometer should read 75%RH.  My Extech 445815 only reached 68%.  I was surprised by this, so I repeated the test trying to find errors in my test methodology.  Each time, the 445815 read 68%. So, my unit reads 7% low.

The low reading should not be a problem because the 445815 has a multi-turn pot that allows the user to trim the RH adjustment.  The 445815 even includes clear instructions on how to do this, but the procedure proved impossible.  The trim pot was already adjusted to its upper limit.  Turning the trim pot further, did not affect the relative humidity reading.  As another reviewer wrote, there is a soft click sound when the RH trim pot reaches its upper limit. The trim pot did work in the other direction (I could decrease the RH value) but that was not helpful.

Having said all of this, I do like products from Extech.  I have an amazing Extech multimeter on the bench next to me right now.  Other than this hygrometer, Extech instruments have always proven themselves to be high quality and a good value.

Other reviewers report good results with this meter.  I must have received a dud.  You should test your meter before use.
76434
It doesn't cover everything on the test. There are several models of instruction not covered. Do not use this exclusively. It'll get you a 70. My cover was on upside down. How can I take this book seriously??
2264509
Test works.  But reaction time is very very long, 15 to 20 minutes. It also did not provide as many tests as indicated.
3866866
Ive been using opks for a few months now and Ive been trying different brands to see what works for me. These were thinner then the ones Ive used  and not very good from what I experienced. Last month I never got a clear positive and it was not from lack of testing because I tested almost everyday . I tested two of these strips in the same urine against my clinic guard strips ( I got in the past and decided to rebuy for the future) none of them are a true positive but hopefully you can see the varied results on the bottom two strips. At the very least I feel the same brand should have the same result in the same urine. Is only a small variation but when you're looking at these little lines its a big difference. I will not be buying these again. As far as the pregnancy tests go I took two last month and wasn't pregnant and there was no false positives or faint lines so they seem to work well from what I can tell.
Update new picture from my actual surge. All three were dipped in the same sample. These strips are inconsistent.
4802217
I had read the other reviews and was prepared for some of the problems getting small capsule contents into small container.  I made 4 separate triple foil sheets to catch any spills, 1 for each test with a colored capsule taped to it so no cross contamination.
 I also kept my hands clean and washed and dried each container well & used a clean Q-tip to swab each container.
  The first test was with my problem soil, taken as directed, mixed as directed, waited as directed then tested and waited again.  The results were baffling.
  Test  #1  my compost with aged Alpaca poop.
  On to test #2  after carefully washing and soil collecting, same baffling results.
  On to test #3  My well water,  same baffling results.
  On to test #4  Distilled water, new, unopened from a store.  Same baffling results:
  Distilled water  well water  bad soil  compost
  PH  #4 - 7.5 or higher.  #3  7.0  #2 7.0  #1  7.5
  N (nitrogen) #4  none  #3 - none  #2 N2- adequate  #1 N4 - higher than surplus
  P (Potash)  #4 K3 or K4 Surplus  #3 - K1 depleted  #2 K3 Sufficient  #1 K3 Sufficient
  P (Phosphorus) #4  K4  Surplus  #3 - P4 Surplus  #2 P4 Surplus  #1 P4 Surplus

  Since even the distilled water had both Prosperous and Potash above the scale,  I find the results useless.
  It seems odd that everything but my alkaline well water had high  and maybe off the scale of Potash....
  It seems odd that everything had high and maybe off the scale of Phosphorous... Nitrogen and PH.. well maybe - who knows..
I did my best to keep clean uncontaminated samples, and to get the entire contents of the capsules into the chamber, and wait.
Nitrogen seemed to be the only reliable test, and I have a test kits from my fish tank days for that.  PH test seemed maybe ok.

 The test chambers were badly designed, and that seems to be true for the industry.  It would be easy to design the test chamber so it would not fall over and be wide enough to easily empty the capsules into.
  I had high hopes.... oh well, the luster is off the leaf for me.
416650
It works well enough, but not as well as others I've used. This one tends to "dance around" even when you're giving it a good even note. Maybe it's super sensitive. I've seen others that have a smoother response. Maybe they take an average of multiple samples or something. They're a lot easier to use.
4499043
Bought two of these kits and tested two completely different types of soil.  One was a pre-existing garden and the other was a brand new garden made with store bought soil and compost.  The soil in these two gardens is totally different.  I gathered up 2 cups of soil from each getting multiple samples from around each garden.  After mixing well, I measured each of those with these kits.  I then took the remaining soil and took it to the county extension for professional soil analysis.  I was a little suspicious right away because both gardens tested with the same numbers in the test kit and I would expect to see some difference between them.  When I got the results back from the professional test, it confirmed that the test kit was inaccurate.  The Ph is measurement is not too bad.  I estimated somewhere between 7.0 and 8.0 with the kit and the professional test reported 7.0.  The phosphorous results from the kit showed "very low' and Potash showed medium.  The professional test showed phosphorus and potash were off the charts.  If I blindly followed this kit, I would have been putting a lot of phosphorus and a little potash on these when they probably won't need any for years.  I give this a 2 star rating just because the pH was reasonable.
3540110
There are many letters are not correct. And even some answers are not right. Some of the answer key are useless...it just repeat the answer and says it is right or wrong. Even though there are two sets tests. I won't introduce it to my friends.
1713261
Some of the questions in the book were in the HSPT word for word.  Other questions about Base 5 and intersection () were not covered in the test at all.