ANB-SEMIC Semi-Micro Analytical Balance 0.01 mg, up to 220 g, internal calibration

COLO.Science · Weighing · Semi-micro analytical balances

ANB-SEMIC semi-micro analytical balance — 0.01 mg readability, up to 220 g

The ANB-SEMIC is a semi-micro analytical balance with an electromagnetic force restoration sensor and a readability of 0.01 mg. A new weighing pan — an open grid pan inside a ring-shaped draft shield — reduces the effect of air currents in the weighing chamber, so the reading settles faster and repeats more closely. Nine models are available: dual range with 100 g or 200 g and a 0.01 mg fine range of 31, 51 or 81 g, and single range with 100, 120 or 220 g at 0.01 mg.

Semi-micro weighing for sample preparation, standards and residues

At 0.01 mg (10 µg) the balance resolves masses ten times smaller than a standard analytical balance. This is the resolution needed for reference standards, small sample amounts in chromatography and spectroscopy, filter and residue weighing, and gravimetric pipette checks. The semi-micro analytical balance ANB-SEMIC combines this resolution with automatic internal calibration and a weighing chamber designed for stable readings.

Key characteristics

• Readability 0.01 mg; dual range 0.1 mg / 0.01 mg or single range 0.01 mg
• Repeatability ≤ ±0.015 mg and linearity ≤ ±0.03 mg in the 0.01 mg range
• Automatic internal calibration with a selectable interval in 1 h steps — corrects deviations caused by temperature changes
• Grid weighing pan Ø 90 mm with ring-shaped draft shield
• Antistatic glass draft shield with three sliding doors
• Detachable high-brightness display with clock; RS232 and USB interface

Suitable for

• Reference standards and small sample amounts for HPLC, GC and ICP
• Filter, dust and residue weighing in environmental and QC laboratories
• Pharmaceutical and research laboratories working with mg sample amounts
• Gravimetric pipette calibration and density determination

New weighing pan design — less air current, more precision

At 0.01 mg the balance resolves forces far smaller than the push of air moving inside the weighing chamber. Air currents from opening the doors, convection from small temperature differences and the operator’s movement act on the pan — they are the most common reason for a drifting or slowly settling reading.

The ANB-SEMIC reduces this effect where it starts: at the pan itself. The pan is an open lattice instead of a solid plate, so air passes through it instead of pressing on a closed surface, and a ring-shaped draft shield around the pan blocks the air flowing across the chamber floor. Less air movement on the pan means the reading settles quickly after the door is closed and repeated weighings of the same sample scatter less.

Weighing practice at 0.01 mg — air currents, static charge, temperature and the weighing place — on COLO.Science.

How the ANB-SEMIC is built

Four details that decide stable semi-micro weighing in daily work.

Grid pan with draft ringOpen grid pan Ø 90 mm in a ring-shaped draft shield — less influence of air currents.

Antistatic glass draft shieldThree sliding glass doors for access from the left, right and top.

Detachable displayHigh-brightness display with clock; place it where it is easiest to read and operate.

RS232 · USB interfaceBidirectional data interface; results exported to Excel, to a PC, LIMS or printer.

ANB-SEMIC models

Dual range models weigh with 0.1 mg over the full capacity and switch to 0.01 mg in the fine range; single range models weigh with 0.01 mg over the full capacity.

Operation and weighing functions

The detachable display has direct keys for calibration, printing, menu, units and tare, and shows the time next to the result. Weighing functions: basic weighing with Σ totalising, dynamic weighing, piece counting, percent weighing, density determination and pipette calibration.

Results are sent via RS232 or USB and can be exported to Excel. Below-balance weighing is available for density determination and suspended samples.

Weighing environment for 0.01 mg results

• Stable, vibration-free weighing table; away from doors, windows, air conditioning outlets and direct sunlight
• Constant room temperature; set the auto-calibration interval (1 h steps) to the room conditions
• Keep the balance connected to power and allow 30–60 min warm-up before the first weighing
• Level the balance after every relocation; let samples and containers reach room temperature
• Use antistatic containers for powders and plastics; open only the door you need

Standard delivery and accessories

• ANB-SEMIC semi-micro analytical balance with glass draft shield
• Detachable display with connecting cable
• Grid pan Ø 90 mm with ring-shaped draft shield
• Power cable and operation manual

Optional: density determination kit (stainless steel, with beaker, sample holder and bridge) and compact thermal printer for weighing records.

Technical specification and knowledge base

Full technical data are in the ANB-SEMIC technical specification (PDF). Weighing practice, methods and applications are on COLO.Science.

Choosing the right model

• Most samples small but larger containers too: dual range — 0.01 mg in the fine range, 0.1 mg up to 100 or 200 g
• Choose the fine range (31, 51 or 81 g) by the tare of the containers used for 0.01 mg work
• 0.01 mg over the full capacity: single range 100, 120 or 220 g
• For 0.1 mg routine weighing an analytical balance is the more economical choice — see the weighing catalogue

Configuration and delivery

Send your typical sample mass, the containers you use and your methods — COLO confirms the model, accessories and delivery time with the quotation.

Sales and support for international customers

COLO Lab ExpertsPolje ob Sotli 4, SI-3255 Buče, Slovenia
Phone: +386 70 713 437 · Email: sales@colo.si · Web: colo.si

We supply laboratories across Europe directly and through partners. B2B prices are quoted net, excluding VAT.

Need help choosing a semi-micro analytical balance?

Tell us your sample mass, container tare and the methods you use — we propose the right ANB-SEMIC model and set-up and confirm it with the quotation.