A&D Weighing AD-4212B-PT Dual-Range Pipette Accuracy Testing System (31g/110g x 0.01mg/0.1mg)

Description

The AD-4212B-PT steps up to a dual-range balance — 31g at 0.01mg readability and 110g at 0.1mg readability — for labs that need to gravimetrically test pipettes across both very small and larger dispensed volumes on the same instrument. The balance switches range automatically depending on sample weight, so a technician testing a 10µL pipette and a 1000µL pipette back-to-back doesn’t need two separate systems.

Like the rest of the PT series, it’s built on the gravimetric method that ISO 8655 specifies: dispense into the weighing pan, the balance captures the weight, and WinCT-Pipette software converts that to volume and compiles the mean, standard deviation, and %CV a pipette accuracy certificate requires. A stainless steel breeze break protects the round Ø34mm pan at this sensitivity, stabilization is 2.5-4.0 seconds depending on range, and Ethernet/LAN plus RS-232C connectivity support automated data logging. The complete system ships in a 470 x 150 x 355mm carrying case.

The finer 0.01mg readability at the low end makes this the better fit than the AD-4212A-PT for labs routinely testing low-volume pipettes (single- and multi-channel) where readability at the smallest dispensed volumes drives measurement uncertainty.

**Frequently asked questions**

**Why would I choose this over the AD-4212A-PT?** The AD-4212B-PT’s dual range gives 0.01mg readability at the low end (31g range), which matters when gravimetrically testing low-volume pipettes where a coarser readability would dominate the measurement uncertainty. The AD-4212A-PT is a simpler single-range 110g x 0.0001g system.

**Does the range switch automatically?** Yes, the balance is a dual-range design that switches between the 31g/0.01mg and 110g/0.1mg ranges based on the load, so no manual reconfiguration is needed between tests.

**Is WinCT-Pipette software included?** Yes, it ships with the system and handles the weight-to-volume conversion and statistical reporting (mean, SD, %CV) that a gravimetric pipette accuracy report requires.