AND Ion BM [BM-5] Microbalance, 5.2 g x 0.001 mg - 25 mm Ø  w/ Internal Calibration and Static Eliminator. The A&D BM-5 microbalance has a capacity of 5.2 grams with a readability of 0.001 mg (1 µg) and features internal calibration and a fanless ionizer. Weighing is at the heart of many laboratory processes and the Ion Series offers the features, performance and standard accessories to bring real convenience to your lab. The ION Series lets you handle with confidence even trace quantities of valuable or degradable substances. Critical to precision weighing is static control, which is why the direct current fanless ionizer is standard on all models. The automatic response adjustment function uses environmental data from built-in sensors to compensate the balance's characteristics to deliver fast and stable results. Calibration is also automatic and always available with a single key press. A range of accessories add extra convenience. The ION microbalances have the performance and standard accessories to simplify microgram measurements. These balances now make microgram (µg) measurements accessible to all researchers and offers a real choice in microbalances.