Precision Balances

A precision balance is a laboratory weighing instrument that measures mass to one or two decimal places of a gram, typically from 0.1 g down to 0.001 g, over capacities reaching several kilograms. It sits between the analytical balance, which reads to 0.0001 g, and the simpler toploader.

The term refers to the readability band the instrument works in: a precision balance resolves to a hundredth or a thousandth of a gram, finer than a toploader but coarser than an analytical balance. The word precision describes the increment it reads, not a brand or model line.

Most modern precision balances use electromagnetic force restoration, where a coil generates a counterforce to the load on the pan and the current needed to balance it is converted to a mass reading. The finer the readability, the more the result depends on a stable, draft-free environment.

The listings cover analytical balances, precision balances, laboratory scales, laboratory weighing scales, laboratory balances and electronic balances. They differ mainly in readability and capacity, with analytical balances reading finest and laboratory scales handling heavier loads at coarser increments.

They handle gravimetric analysis, formulation and routine sample preparation, weighing reagents, filled flasks and packaged batches. The specific job depends on the capacity and readability of the model: a small-capacity unit reading to 0.001 g weighs reagents, while a high-capacity unit checks the mass of larger items.

Start with the heaviest load the balance must hold and the smallest increment you need to resolve, because that pair fixes the model range and rules out most of the catalogue in one step. Where a second decimal place is not needed, a higher capacity at coarser readability is usually cheaper and more robust.

A used balance is sold in the condition it arrives, while a refurbished unit has been checked and brought back to working order before listing. On a used unit the question is whether it still reads true, so ask for a recent calibration record and a linearity check rather than judging by appearance.

Prices across the catalogue range from EUR 9 to EUR 38.740, with the average near EUR 1.514. The low end covers bare accessories and entry-level balances, while high-capacity or specialised instruments sit at the top.

The brands filling the catalogue are Ohaus, Mettler Toledo, Radwag, Sartorius and A&D. An Ohaus or A&D model typically costs less than a comparable Mettler Toledo or Sartorius, while the latter two bring wider parts availability and denser second-hand supply.

A warranty is often possible and is arranged in consultation for the specific listing. Terms are not set centrally, so check the individual listing and raise the question before ordering.

Parts can be sourced via Questpair. Common wear items include replacement pans, pan supports, draft shields and levelling feet, which are worth confirming are present on a used unit before purchase.

A precision balance can stay in service for many years if it is sited well and kept calibrated, since the electronics rarely wear out. What limits usable life is drift and the loss of accessories like the draft shield, not age alone.

Used and refurbished units are listed at lower prices than new ones at the same capacity and readability. Because the catalogue runs heavily toward pre-owned instruments, the affordable end is well stocked; weigh the price saving against the condition stated in the individual listing.

New, used and refurbished units are listed on Questpair from 18 verified suppliers and distributors across 11 countries. Of the 1902 precision balance listings, 1436 are used and 466 are new.

Lead time and shipping depend on the individual supplier and the unit's location across the 11 countries represented. Check the specific listing, since a bench instrument in stock ships differently from one that needs preparation.

Confirm whether the instrument has internal calibration or needs an external weight set, and match any calibration weight to the balance by its OIML or ASTM class. For anything reading to 0.001 g, keep the unit bench-mounted and shielded from air currents, since siting affects the reading as much as the hardware.

Accessories are the largest single group, covering calibration weights, draft shields, replacement pans, anti-vibration tables and printers. A lab doing gravimetric analysis buys the weight set for traceability, a cleanroom running sample preparation buys the anti-vibration table, and a quality lab buys the printer to log each weighing.

Ohaus, Mettler Toledo, Radwag, Sartorius and A&D account for the bulk of the listings. Dense second-hand supply from Mettler Toledo and Sartorius makes one model easier to compare against another, while Ohaus and A&D give a lower entry price at comparable capacity and readability.

The low end holds bare accessories and entry-level balances, while the top holds high-capacity instruments and specialised models. Between them, readability against capacity and brand account for most of the difference: a finer increment, a heavier capacity or a Mettler Toledo or Sartorius badge each pushes the price up.