Calibration Weights
Accurate and stable reference standards for calibrating weighing equipment, including variously certified/accredited weights and weight sets from different classes. Products may be constructed of aluminum, stainless steel, brass, iron, and other alloys.
Calibration weights (also known as reference weights or test weights) are manufactured to meet high tolerances and accuracy. They are used to spot-check the performance and verify the calibration of analytical balances, precision balances, and general-purpose scales in research laboratories, educational settings, and other working environments. Some calibration weights may also be used as reference weights for the calibration of improvised or non-certified weights.
How Are Calibration Weights Made?
Calibration weights may be take the form of simple discs, cylinders, wires, or leaves. Sold separately or as sets, they may also be supplied with tweezers, gloves, and a protective case. Calibration weights are often supplied as accessories for specific balance brands and models.
Calibration weights are made from polished brass, aluminum, special stainless steels, or other metals for durability, anti-magnetization, and resistance to corrosion or wear that may affect their accuracy.
Available in nominal values from a few milligrams to 10 kg or more, they may be supplied with certificates or statements of accuracy, compliance, and traceability.
How Are Calibration Weights Classified?
Calibration weights are classified based on accuracy by organizations such as ASTM, OIML, and NIST. The appropriate classification depends on the resolution of the balance and the degree of accuracy needed to satisfy a particular weighing application.
Principal Classes of Calibration Weights:
• Class M1: For standard scales
• Class F1: For precision electronic balances
• Class E2: For highly accurate analytical balances
Hach Company Weight Set, Class M-2
Standard weight set. 16-piece, with stainless steel forceps. Eight fractional weights: 10, 20, 50, 100, 200, 200, 200, and 500 mg. (Two fractional weights, 200 mg and 500mg, are stainless steel, the rest are aluminum) Eight brass gram weighs: 1, 2, 2, 5, 10, 10, 20, and 50 grams. Polypropylene case.
Rice Lake Weighing System Scale,Floor Level 150-10-7 550lb(250kg) x 0.2lb(100g) includes 6 AA Alkaline batteries
Medical Scale, Rice Lake Weighing Systems, Floor Level Physician Scale 150-107 550lb(250kg) x 0.2lb(100g) includes 6 AA batteries, LCD display, 14.5in x 14.5in x 3 in H, BMI (body mass index) function, Motion Trap
Reprocell Stemolecule™ Y27632 2mg
Y27632 is a cell-permeable small molecule Rho-associated kinase (ROCK) inhibitor. Size 2 mg. Y27632 has been found to prevent apoptosis as well as enhance the survival and cloning efficiency of dissociated human embryonic stem (ES) cells without affecting their self-renewal properties or pluripotency. This molecule has also been shown to enhance survival during the transplantation of ES cell-derived neural precursors. Y27632 in combination with Pifithrin-u significantly improves cell recovery after cryopreservation.
Enterprise Technology Solutions Solo Cup Company Knives, Plastic, Heavyweight 1-1/10"Wx7"L, 1000/CT, White
Knives feature a heavyweight construction for sturdy performance with dense foods. Single-use cutlery is disposable for quick cleanup after use. Smooth handle helps you keep a firm grip to prevent slipping. Full-size design makes this a perfect match for high-end takeout, company events and more.
TA Instruments TGA Weight Set Calibrated, Calibrated Weight Set, Discovery TGA, Balance Mechanism, Weight Calibration, TGA Weight Set Calibrated
Waters TA Instruments TGA Weight Set (Calibrated) is a calibrated weight set used for weight calibration of the Discovery TGA balance mechanism. It ensures accurate and reproducible instrument operation.
Cayman Chemical 3-methoxy ProstaglndIn F1a 1mg
3-methoxy PGF1α is a novel analog of PGF1α with a methoxy group in the 3-position of the upper side chain. There are no published reports describing the pharmacology of 3-methoxy PGF1α at this time.
Grainger Lockwire Spool 0.0201 Dia 207.75ft
The Malin Company Lockwire is a 0.032 inch diameter stainless steel lockwire used to prevent loosening of threaded fasteners. It comes in a 225 foot roll and features a tensile strength of 300,000 psi. The lockwire creates a lock effect when installed in a crisscross pattern to secure bolts, nuts, turnbuckles and other threaded assemblies. It conforms to MIL-W-83420 and MS20995 standards. The lockwire is made in the USA.
Grainger RICE LAKE WEIGHING SYSTEMS, Calibration Weight, 10 lb Nominal
The Rice Lake Weighing Systems 10 lb Calibration Weight is a high-precision weight used for calibrating and checking scales for accuracy. It features a stainless steel construction with a knob handle on top for easy handling. The weight has an accuracy tolerance of +/- 5 grams to ensure reliable calibration. With NIST traceable calibration certificate, this 10 lb weight is ideal for use in industrial, laboratory, and other precision weighing applications. The durable build makes it suitable for daily use.