AUTO MICRO BURETTE WITH SIDE FILLING TUBE AND BASE NO.1661

Description

The No. 1661 Automatic Micro Burette is a high-precision volumetric instrument designed for rapid, repeatable titrations in micro-analytical chemistry. This model is characterized by its “Automatic Zero” function and a side-filling tube, which allows the burette to be refilled directly from a reservoir bottle via a rubber bellow or pressure system.

Key Product Features

• Automatic Zeroing: Designed to automatically set the liquid level to the “0” mark. When the reservoir is pressurized, liquid fills the burette; once pressure is released, excess liquid drains back into the bottle, leaving the meniscus exactly at the zero point.

• Side-Filling Tube: Features a dedicated side-arm for connection to a reservoir bottle. This eliminates the need for manual pouring from the top, reducing the risk of chemical spills and air bubble formation.

• Detachable or Integrated Base: The burette is typically mounted on a heavy, stable base (often glass or plastic) to prevent tipping during use.

• High-Precision PTFE or Glass Stopcock: Usually equipped with a fine-bore stopcock for delicate, drop-wise control, essential for micro-titration where every fraction of a milliliter counts.

• Borosilicate 3.3 Glass: The entire assembly is made from low-expansion glass, ensuring high chemical resistance and thermal stability.

Technical Specifications

Primary Applications

• Micro-Titrations: Ideal for laboratory work where sample sizes are extremely limited.

• Routine Quality Control: The automatic zeroing feature makes it exceptionally fast for performing multiple titrations in a row.

• Environmental Analysis: Used for measuring trace amounts of pollutants in water or soil extracts.

• Pharmaceutical Labs: Precise enough for the assay of potent drug substances.

Operational Guide

1. Setup: Connect the side-filling tube to a reservoir bottle using appropriate laboratory tubing. Attach a rubber pressure bulb (bellow) to the reservoir.

2. Filling: Squeeze the bulb to force the titrant up the filling tube into the burette barrel.

3. Zeroing: Allow the liquid to rise slightly above the 0ml mark. Release the pressure. The “Automatic Zero” overflow mechanism will draw the excess liquid back into the reservoir, perfectly leveling the meniscus.

4. Titration: Open the stopcock to dispense the titrant drop-by-drop into your reaction vessel.

Maintenance & Care

• Cleaning: The complex geometry of the side-filling tube requires thorough rinsing with distilled water after every use to prevent salt crystallization.

• Pressure Check: Regularly inspect the tubing and the rubber bulb for cracks to ensure a consistent vacuum/pressure seal.

• Storage: If using a glass stopcock, ensure it is lubricated. For PTFE models, loosen the nut slightly if the unit will not be used for an extended period to prevent deformation.

Why Choose the No. 1661?

The No. 1661 is the preferred choice for analysts who value speed and precision. By automating the zeroing process and centralizing the reagent supply, it minimizes human error and significantly increases laboratory throughput for micro-scale volumetric tasks.