"Riffle Pan"

Supplier: MINERALAB, LLC

The Universal Specific Gravity Kit is designed to be used with any electronic scale with a minimum capacity of 15 grams and a tare (re-zeroing) function to easily measure the specific gravity of gemstones and minerals.
Just weigh the stone "in air" on the integrated weighing platform of the scale, then without changing the setup, weigh the stone in water by placing it in the underwater weighing pan of the gem holder suspended above the platform. Plug the two values into the specific gravity equation and obtain the specific gravity of your stone.

Includes: lightweight gem holder support and underwater weighing pan, independent, spill-resistant, adjustable beaker support, beaker for filling with water - 100ml capacity, aluminum test weight, stainless steel tweezers, instructions, reproducible Specific Gravity worksheet, table of 300 common minerals/gems sorted by SG, with 6 other properties, including refractive index.

Note: shown with Boreal Balance - not included.

Supplier: STEINER ENTERPRISES SE

This sensitive balance has as adjustable counterweight and an optical lever for measuring tiny forces by the null method. It comes with a pair of straight aluminum rods for measuring the repulsive force between parallel current-carrying conductors and a pair of plates for measuring the attractive force between charged capacitor plates. A current of 10 to 20A is required to cause sufficient deflection in the electromagnetic experiment. Fractional weights are then added to a small pan attached to the upper conductor rod to return the balance to its original position, determining the force between the conductors.

Supplier: OHAUS CORP.

Ward's precision balances are perfect for school laboratories, AP classes, or prep-room use. These balances measure in grams and Newtons.

Supplier: OHAUS CORP.

These economical balances feature a stackable design with a shipping load cell lock and overload protection for up to 200 pounds.

Supplier: OHAUS SCALE CORP

Affordable balance to achieve reliable results. The Pioneer PX combines essential weighing functionality with competitive performance, offering high accuracy and repeatability for applications in laboratory, industrial and education settings.

Supplier: VWR International

VWR® B2-Series balances combine advanced weighing features with intuitive operation.

Supplier: OHAUS CORP.

These portable, compact scales are an economic option for the lab.

Supplier: OHAUS CORP.

These Scout balances are the next generation of portable balances for the classroom.

Supplier: OHAUS CORP.

The Navigator™ series is perfect for general weighing applications in laboratory, industrial and education settings.

Supplier: METTLER TOLEDO S.A. DE C.V. MX

XPR Precision Balances, successor to the XPE Precision Balances, deliver outstanding weighing performance and support the highest requirements for data integrity and compliance. Quality assurance features ensure your weighing results are always valid, helping you to comply with even the strictest regulations.

Supplier: OHAUS SCALE CORP

Designed for routine weighing applications. The PR is equipped with 3 essential weighing modes, RS-232 connectivity for data transfer and storage and internal calibration (in select models), making it ideal for routine weighing applications.

Supplier: METTLER TOLEDO S.A. DE C.V. MX

The next generation of Analytical weighing has arrived. The XPR analytical balances provide ultimate accuracy and quality assurance functions that are second to none.

Supplier: Avantor Fluid Handling

Easy tubing changes—even in tight spaces.

Supplier: OHAUS CORP.

Combining Economy and High Performance for Essential Weighing.

Supplier: VWR International

Combination weighing vessel/funnel for speedy, precise weighing and transfer of samples without loss.

Supplier: VWR International

Ideal for weighing, sampling, dispensing, storage, food processing, evaporating or general laboratory use.