Bottle Top Dispensers, Autoclavable Adjustable Volume ISO 8655 Certified

Description

The Bottle-Top Dispensers, also known as adjustable bottle-top dispensers, laboratory reagent dispensers or bottle-mounted liquid dispensers, are designed for controlled and repeatable dispensing of compatible liquids directly from laboratory reagent bottles. Manufactured by Lasany International and supplied through IEC, these instruments provide an adjustable-volume dispensing solution for analytical chemistry, sample preparation, quality control and routine laboratory liquid handling. The range includes six adjustable-volume models, covering dispensing capacities from 0.25 mL to 100 mL. Each model offers a specific volume interval to accommodate different laboratory procedures.

The 0.25–2.5 mL and 0.5–5 mL dispensers are suitable for smaller reagent quantities, while the 1–10 mL and 2.5–30 mL models support intermediate dispensing requirements. The 5–60 mL and 10–100 mL variations accommodate larger liquid volumes where repeated transfers from reagent bottles are required. Each dispenser features a smooth plunger mechanism, allowing users to aspirate and dispense selected volumes through manual operation. This supports repetitive liquid-handling procedures without repeatedly transferring reagents into separate measuring vessels. A locking rocker switch controls volume adjustment, helping users maintain the selected setting throughout a dispensing procedure. The Research Range is described as using PTFE, FEP and borosilicate glass wetted components, materials commonly selected for their chemical resistance in laboratory dispensing equipment.

The manufacturer’s general component table also lists a polypropylene piston and delivery tube. Consequently, the exact wetted-material configuration should be confirmed before using the dispenser with chemically aggressive reagents. The instrument incorporates a glass cylinder and glass ball-and-seat valve assembly, with a Teflon discharge component. Together, these components form part of the liquid aspiration and delivery mechanism. A safety discharge system helps reduce accidental liquid release, while the protective nozzle cap helps prevent unwanted droplets from contacting the surrounding work surface. The dispenser features a standard 30 mm bottle thread, with additional adapter sizes listed as 28, 32, 36, 40 and 45 mm. This arrangement allows installation on compatible laboratory reagent bottles.

The manufacturer states that three bottle adapters are supplied with each instrument, although the specific three sizes are not identified in the available documentation. The dispensers are designed for autoclaving at 121°C and 15 psi. The manufacturer refers to disassembly in its autoclaving instructions, so the applicable procedure must be followed before sterilisation. Components can also be disassembled for cleaning and servicing, allowing routine maintenance according to the manufacturer’s instructions. Each dispenser is individually calibrated and supplied with a calibration certificate, with accuracy and repeatability specified in accordance with ISO 8655 requirements.

Users can perform laboratory recalibration when required by established quality-control procedures. These dispensers are suitable for pharmaceutical, biotechnology, chemical analysis, environmental testing and research laboratories handling compatible reagents. Safety Precautions: Verify chemical compatibility before use, particularly with concentrated acids, solvents and reactive liquids. The manufacturer excludes hydrofluoric acid (HF). Wear suitable personal protective equipment, ensure the reagent bottle is stable and never direct the discharge nozzle towards people. Each selected model is supplied as one adjustable Research Range bottle-top dispenser, with manufacturer-specified bottle adapters and individual calibration documentation.

LabChoice Australia supplies bottle-top dispensers and laboratory liquid-handling equipment for schools, universities, research laboratories, pharmaceutical facilities and industrial laboratories across Australia.