Just google hemoglobin testers. They range from $200-$400. I don't have one. I give blood at a blood bank, but was considering buying one. At the blood bank they test you before you donate to make sure your RBC count is not too high. I'm curious to see how much of difference it makes after donating. Also how certain compounds affect it. On trt I can pass the 56 day mark and I'm still good. The last time I blasted with just test prop it got high pretty quickly. You can do blood work just the same, to get your numbers, but I think if your self draining getting one of those machines would make sense. Sometimes one pint is not enough to get it down if your too high so you might have to drain more frequently then once every 56 days. Blood banks don't allow that, but you can do it yourself.