Nonsalable waste milk has been fed to calves for many years and represents a source of nutrition that is readily available, has few other uses, and is cheaper to feed than whole milk. However, solids content and bacteria levels are two problems associated with waste milk feeding. The DD-2 Digital-Dairy refractometer cannot read solids content directly, that would require the milk solids scale available only on Model DD-1 and DD-3, however you can determine percent solids using the Brix scale and then converting the result into percent solids using equation available from producers of calf milk replacer. Once percent solids have been determined it is easy to adjust the waste milk to desired solids levels with calf milk replacer. Another quick test for bacterial contamination and milk spoilage can be conducted using a pH meter, also available from MISCO. Only a couple drops of sample are necessary to fill the Digital-Dairys stainless-steel sample well. The sapphire measuring surface, the next hardest substance to diamond, will withstand years of wear and tear. A simple user-friendly interface consists of two buttons: one to take readings and the other to step through various menu options. A large 24-character back lit LCD display is easily read, even in dim light, while an evaporation cover helps prevent evaporation and keeps out stray light. A measure of blood plasma protein concentration can be used as an indication of passive transfer. There is a close correlation between total protein concentration and IgG levels in calves 24 hours of age. The blood plasma protein test requires a sample of blood plasma, not whole blood. Samples must be spun in a centrifuge, or allowed to sit undisturbed for 24 hours, to separate the plasma from the whole blood before testing on the refractometer. INCLUDES: MISCO Palm Abbe Refractometer, Protective Rubber Armor Jacket, Instruction Manual Brand New! Fresh from the Factory! The DD-2 Digital-Dairy Refractometer will provide reliable estimates of the percent solids in waste milk and colostrum quality using the Brix Method, and a blood plasma protein concentration scale can be used to test for IgG levels. The MISCO Digital-DairyTM refractometers are specifically designed to help professional dairy farmers and calf ranchers to rear healthy calves They are rugged enough to withstand the demands of farm use, yet precise enough to give laboratory-quality readings. Made in the USA, Cleveland to be exact! INCLUDES: MISCO Palm Abbe Refractometer, Protective Rubber Armor Jacket, Instruction Manual International Shipping: Shipping will be via US Postal's Air Mail/Global Priority (3-8 business days) is $15.00 ($12.00 to Canada) . There can be Customs delays, and there aren't any Tracking Numbers. WE ARE NOT RESPONSIBLE FOR CUSTOMS DELAYS OR LOST PACKAGES! We get the packages to the shipper, they ship it to you. Don't worry! They do have wonderful service and assist in reducing your import taxes. Buy more items, for a total of 2 portable refractometers, and the shipping charge is still just $15.00 (world)/$12.00 (Canada) via the Air Mail/Global Priority! Of course, you'll have to win this sale to get the first item! Air Mail/Global Priority: World: $15.00 Canada: $12.00 For an additional $15.00 you can upgrade to USPS Express Mail (which takes 3-5 business days) and includes Shipping Insurance to $100.00, Delivery Confirmation and a Tracking Number. National Industrial Supply 30777 Rancho California #891420 Temecula, CA 92591, USA Sales: 951.308.9269 Fax: 310.833.7306 Email: nisupply@gmail.com We prefer Paypal! Pay me securely with any major credit card through PayPal!