Fisher Clamp / Burette Clamp

The spring-loaded jack mechanism is precision-engineered to provide a powerful, adjustable grip on the burette. The mechanism consists of a spring-loaded component in the middle of the clamp that applies consistent pressure to hold the burette securely. To use it, simply insert your burette into the clamp opening and tighten the adjusting screw or knob (depending on the specific design) to engage the spring mechanism. The spring tension provides a vice-like grip that prevents slipping while still allowing for smooth vertical adjustment when desired. For adjustment, loosen the mechanism slightly to reposition the burette, then retighten to secure it in the new position. The mechanism is designed for years of reliable service without losing spring tension.

These Fisher clamps are designed with versatility in mind and feature two tapered wedges that accommodate the two most common laboratory support rod diameters: 1/2 inch (approximately 12.7 mm) and 3/8 inch (approximately 9.5 mm). The tapered wedge design ensures a firm, secure grip on either rod size, preventing rotation or slippage of the clamp assembly during use. This dual-size compatibility makes these clamps suitable for virtually all standard laboratory support stands and frameworks, eliminating the need to purchase different clamps for different rod sizes.

The single clamp model (Code 45101) features one burette-holding mechanism per clamp assembly and is designed for titration setups requiring a single burette. It is supplied in economical packs of 12 pieces, making it ideal for equipping multiple student workstations or for laboratories with high-volume titration needs. The double clamp model (Code 45102) features two independent burette-holding mechanisms on a single clamp assembly, allowing two burettes to be mounted side-by-side on one support rod. This configuration is perfect for comparative titrations, simultaneous analyses, or procedures requiring two different titrants. The double clamp is supplied in packs of 6 pieces and offers excellent space efficiency on crowded laboratory benchtops.

While these clamps are specifically designed and optimized for securing burettes, their versatile spring-loaded grip mechanism can accommodate other cylindrical laboratory glassware of similar diameter, such as small chromatography columns, thermometers, or glass tubing. However, for optimal performance and safety, we recommend using these clamps primarily for their intended purpose of burette support. For specialized applications with other glassware, ensure that the item is securely gripped and that the clamps gripping mechanism is compatible with the glasswares dimensions and weight to prevent accidents or damage.

Polypropylene has good heat resistance and can withstand temperatures up to approximately 135°C (275°F) without deformation. These clamps are autoclavable and can be sterilized at standard autoclave cycles of 121°C. However, they are not designed for direct flame exposure or use in high-temperature environments such as ovens above 135°C. For most laboratory applications involving titration at ambient temperatures, these clamps perform excellently. If you require clamps for high-temperature applications, please contact our technical support team for alternative material recommendations.

Maintenance of these polypropylene clamps is simple and straightforward. For routine cleaning, wash with mild laboratory detergent and warm water, then rinse thoroughly and allow to air dry. The corrosion-proof nature of polypropylene means you dont need to worry about rust or degradation from moisture. For removal of chemical residues, the clamps can be wiped with appropriate solvents compatible with polypropylene (avoid aggressive solvents that may attack the material). Unlike metal clamps that require periodic lubrication or rust prevention, these polypropylene clamps are virtually maintenance-free. The spring mechanism may be cleaned with a soft brush to remove any accumulated debris. With proper care, these clamps will provide decades of reliable service without deterioration.