Lange makes one of the best models you can buy. They are kind of pricey, but worth it in my opinion.
In regard to accuracy, it depends on what you mean. If you mean getting a truly accurate percent bodyfat from the calipers, then you really need someone else to do the test for you so you can test at 7 sites. Even when conducted by a skilled person, skinfold tests can be off by ~ 3 percent when compared to more accurate methods of body fat testing.
I’m sure you probably knew that but I thought it would be worth repeating for those that might not.
You can get consistent results though with a good pair of calipers and some skilled hands. If you just look at the total millimeters that you pinch from several sites (chest, abs, thigh), you can work on reducing that number. For example, let’s say you do a self test, and pinch 8 millimeters on the chest and thigh, and 15 on the abs, then your total is 31mm. You can then work on reducing this total.
The three things I try to do when conducting a skinfold test are:
- Make sure that the person is similarly hydrated from test to test.
- Do not do the test after you work out
- Make sure no lotion or anything else that may cause the skin to be slippery is present when doing the test.