This kit is easily assembled by attaching the 2 thermometers to the end of the handle and placing the moisture cloth over the wet bulb.ÃâÃÂ Once assembled the user can swing the apparatus and then read the difference in temperature between the web-bulb and dry-bulb to determine the relative humidity.ÃâÃÂ After a few minutes spinning the apparatus the user can take the temperature readings and review the psychometric chart to determine relative humidity
100% Satisfaction Guarantee: At Mansion Schools, we want to be sure that the item you choose is the right one for you. Within 30 days of delivery of your order, you may return any merchandise purchased from Mansion Schools in its original condition with your email order confirmation or packing slip. Restocking fees may apply. On items over $275 shipping within the US, we will even arrange free pick up or pay for returns shipping.