Varomorus 12V Oxalic Acid Vaporizer – Durable Beekeeping Tool for Hive Maintenance – Aluminum Heating Plate, 55-Inch Cord

use this a lot. does a great job.

Great product! easy to use even for 1st time bee keepers like us. Saved my hive from the varroa mites!

Purchased this item and first time I took it to the hive , it didn’t work. Would not heat up. It is past the 30 day window to return. I am updating this review. This company notified me that they sent out a new vaporizer and also spares parts. They made this purchase right. Highly recommend them. Great customer service.

I was able to use the fogger successfully on one hive and I could see the vapors coming out of cracks. I let it cool and went to do the second hive, and it never reached the full top temperature. One of the wires does look melted, so it might have shorted out. I may just replace the wires and give it another go. It's a simple tool. The wires heat a glow plug, which in turn heats the aluminum cup holding the oxalic acid. As long as the wires can carry the current to the glow plug, it will get hot. So there is clearly a problem with the wiring. Update: I re-ran the main wire going to the glow plug so it doesn't come in contact with the main bar. I also took out the melted part of the wire. I believe the wire was pinched the first time and shorted out. The rewire seems to have corrected the problem. I will update as I continue to use it. So four stars for solid machining of the aluminum pieces and solid design. One star deduction for wiring issue. Update 9/15/20: I have now used this vaporizer multiple times with great success. It is a simple design made of quality material. Just rewire it to keep the wires from getting too hot. My 12v 7amp battery was just not quite enough, but the 12v 9amp has done great! It consistently vaporized 1/2 tsp in 5 minutes start to finish.

Works extremely well. Much better then the chamber type applicators which clog with every use. Slip this under bottom board screen and a few minutes later your OA has vaporized into the hive. Let it cool down a minute or two and you’re ready to go again.

I followed the instructions to do a test run and learn how ling it will actually take to vaporize 1/4 tsp of oxalic acid. It took a little over 5 minutes. The instructions say it should take 2-5, depending on conditions. So I wasn't worried. I did an initial treatment on 4 hives, which means 5 total uses, each time taking a little over 5 minutes to complete. Today I went to do the second treatment and found it was taking substantially longer to vaporize the same quantity of OA. The first hive took upwards of ten minutes. The second hive took a little long. I figured maybe my battery needed to be charged so I connected it to the battery on my running lawn tractor with a verified consistent voltage of 12.8v. Even still, the third hive took close to 15 minutes. On the fourth hive I pulled the vaporizer out at 15.5 minutes only to find OA in the tray with minimal active vaporization. Something is clearly wrong. Since I bought it at the end of February so I'd have everything in hand when my new hives and Nucs arrived (Nucs were delayed by MD weather conditions until mid-May), the return window has long since closed. Now all I can di is hope Varomorus support will provide some assistance. If they do help me, I'll absolutely update this review! I need to do the third and final treatment a week from today so they only have a few days to make things right or I have to buy a replacement from another vendor. Attached picture is of the incomplete vaporization after more than 15 minutes on a fully charged battery. I think the charred color is from low-temp operation. The photo doesn't show the light fuming that persisted for another several couple before I finally disconnected it an scraped it all out. Yes, it was clean when I started and all of the wires are in good shape. Not sure if it matters but my infrared thermometer showed a wide temperature range across different parts of the tray. The backside was anywhere between 180 and 240 deg. The temp in the pan was a little over 400 deg. The manual says the operating temperature is 482 deg., well above any temp I'm getting now. For comparison sake, I wish I had checked the temp when I used it the first time.

Highly variable times to burn through the OA. I would do test runs to time it and it would never match up inside the hive. Also, does NOT fit in the Flow Hive entrance, you have to use the back door (lol) aka the tray slot. Didn’t seem very effective.

Did a test run with 4 grams OA (about one level teaspoon of powder). As soon as I plugged vaporizer into 12v Life PO4 battery, I first saw vapor at 1:45. Took 5.5 minutes to vaporize the full 4 grams. I had an extra screened bottom board and I wanted to make sure the hot plate wouldn’t burn through it and it didn’t damage it at all. Plan on treating my overwinter setup of one deep and a medium with 4 grams this weekend. ***Update*** Well this device certainly pisses off my bees when I put it into entrance. They are all over it and I did burn quite a few bees. The next time I tried it on other hive I propped it under the screened bottom board but unsure how much vapor got in. A few days later I counted over 200 dead mites on the sticky board.

Well we are desperate to treat our hives, waited over 2 weeks for delivery. It arrived and didn’t work - it wouldn’t heat up. So we are very disappointed and could lose our bees while waiting for a replacement. Not happy ☹️☹️

Very Sturdy, Excellent Quality, and works every time. Battery cables are long enough for what I need it for. I would highly recommend this product.

Love it. Plugged to a good battery, works really good. The only downside, since we do the acid before winter in cold weather, electrical wire with better cold flexibility would be REALLY enjoyable.

Bon produit, prix raisonnable, explication du mode d’emploi très claire Et livraison rapide

Works well. Had a glitch w burner. Company immediately sent replacements n instructions. GREAT customer service!!!