Name: Automatic Burette
Brand: RichTech

Specifications

Automatic Burette · Specifications

Standard capacity ranges available. Custom sizes available upon request.

Capacity (mL)	Graduation (mL)	Overall Length (mm)	Tube Diameter (mm)	Control Type	Glass Material
5	0.1	450	8	Air-Pressure (Inlet/Outlet Valves)	Borosilicate 3.3 (clear / amber)
10	0.1	500	10	Air-Pressure (Inlet/Outlet Valves)	Borosilicate 3.3 (clear / amber)
25	0.1	600	12	Air-Pressure (Inlet/Outlet Valves)	Borosilicate 3.3 (clear / amber)
50	0.1	700	14	Air-Pressure (Inlet/Outlet Valves)	Borosilicate 3.3 (clear / amber)

* Custom capacities and special specifications available upon request.
* Inlet/outlet valves compatible with standard pneumatic fittings.
* Amber burettes are light-protective, suitable for light-sensitive titrants.

Product Description

The automatic burette builds upon traditional burette design with the addition of air-pressure control ports. The operator regulates the inlet and outlet valves to control the internal air pressure, creating a pressure differential that drives the titrant to flow automatically and steadily. No manual stopcock rotation or rubber tube squeezing is required—titration becomes easier and more controllable.

Clear & Amber · Two Glass Options

RichTech automatic burettes are available in clear glass and amber glass:

Clear Automatic Burette: Classic transparent design for easy observation of liquid level, color changes, and air bubbles. Suitable for routine titration operations.
Amber Automatic Burette: Amber glass body effectively blocks UV light (wavelength ≤ 470nm), preventing light-sensitive titrants from decomposing due to light exposure. Particularly suitable for silver nitrate, iodine, and potassium permanganate titrations, while maintaining the convenience of air-pressure control.

Operating Principle

Air Inlet Control: Opening the inlet valve allows air to enter the upper chamber, increasing pressure and pushing titrant out through the delivery tip.
Air Outlet Control: Opening the outlet valve releases air, reducing pressure to stop or slow the titrant flow.
Pressure Regulation: Balancing inlet and outlet air allows precise control of titration speed for consistent, uniform flow.

Design Features

Air-Pressure Control: Simple operation via inlet and outlet valves for precise, effortless titration control.
All-Glass Fluid Path: Tube body, piston, and delivery tip are all manufactured from borosilicate glass—no metal or rubber contact with titrant.
Clear Graduations: White or blue scale markings with 0.1mL divisions for accurate volume reading.
Stable & Controllable: Air-pressure control delivers consistent titration speed while minimizing operator error.
Light Protection (Amber): Amber glass body effectively blocks UV light, protecting light-sensitive titrants and ensuring accurate titration results.

Material Excellence

Manufactured from borosilicate glass 3.3 with an all-glass structure that eliminates contact between titrant and metal or rubber components, particularly suitable for high-purity analytical applications. Amber glass adds light-blocking capability without affecting chemical resistance.

Usage Tip: Check inlet/outlet valve operation and air-tightness before use. Coordinate inlet and outlet valve adjustments to control titration speed—slow down near the endpoint for accurate detection. Store amber burettes away from direct light to maintain their light-blocking properties.

Applications

Key Application Areas

Acid-Base Titration

Stable air-pressure controlled titration

Redox Titration

Effortless operation with excellent repeatability

Complexometric Titration

Ideal for continuous batch sample titration

Precipitation Titration

Air-pressure control reduces manual error

Industries Served

Pharmaceutical Industry API content determination, quality control
Chemical Industry Product purity analysis
Environmental Monitoring Water quality analysis
Food Testing Food composition analysis
Third-Party Testing High-throughput sample analysis
Research Institutions Standard calibration

Comparison with Other Burettes

vs Acid Burette No stopcock rotation required—easier and more effortless
vs Alkaline Burette No rubber tube aging issues—all-glass fluid path
vs Neutral Burette More flexible pressure control with more stable titration speed

Best Suited For

Extended titration sessions, high-throughput batch analysis, and high-purity analytical applications. Air-pressure control reduces operator fatigue and manual error. For light-sensitive titrants, we recommend using amber automatic burettes to prevent concentration changes due to light exposure.

Automatic Burette Procedure

03

Preparation

Inspect the burette for cracks, scratches, or other defects.
Check that the inlet and outlet valves operate smoothly and the air system is properly sealed.
Rinse the burette 2–3 times with the titrant, using approximately 5–10mL each time.
Amber burettes require the same rinsing procedure as clear burettes.
Ensure the gas supply is connected correctly — clean, dry nitrogen or air is recommended.

04

Filling & Bubble Removal

Fill the burette with titrant to above the zero mark.
Open the outlet valve to equalize pressure with the atmosphere, then slowly open the inlet valve to apply pressure and remove air bubbles from the tip.
Adjust the meniscus to the zero mark or slightly below, close both valves, and record the initial reading.

05

Titration

Slowly open the inlet valve — titrant will begin to flow under air pressure.
Control the titration speed by adjusting the inlet valve opening — wider opening increases flow rate.
Near the endpoint, gradually close the inlet valve to achieve dropwise or half-drop control.
To pause titration, open the outlet valve to release internal pressure.
Read the volume with your eye level with the lowest point of the meniscus.

06

Cleaning & Maintenance

Clean immediately after use to prevent residue from drying.
Clear burettes can be cleaned with standard laboratory detergents.
Amber burettes are cleaned in the same manner as clear burettes — the light-blocking property is unaffected.
Inlet and outlet valves require no special lubrication — simply air-dry after cleaning.
Use dilute acid or specialized cleaning agents for stubborn residues.
Rinse with distilled water and air-dry on a burette stand.
Store carefully to avoid chipping and breakage.

Tip: Amber automatic burettes are ideal for light-sensitive titrants, effectively preventing decomposition due to light exposure. Air-pressure control makes operation effortless and is particularly suitable for continuous batch titration analysis, significantly improving work efficiency.

Care & Notes

Show care & notes

Safety Notes

Wear safety goggles and gloves to prevent splashing.
Inspect burettes for cracks or scratches before use — damaged glass may break under pressure.
Store amber burettes away from direct light to maintain their protective properties.

Do not

Open the inlet valve slowly when pressurizing to avoid sudden pressure surges that may cause splashing.
Handle and store with care, avoiding impact with hard surfaces.