Back to products
Glass Tubing
$ 19.99 Original price was: $ 19.99.$ 19.87Current price is: $ 19.87.
Whetstone bridge with pencil jockey
$ 34.97 Original price was: $ 34.97.$ 34.83Current price is: $ 34.83.
Whatsapp Order
Product Description
The Whetstone Bridge with Pencil Jockey is a precision electrical instrument used to measure unknown electrical resistances by balancing two legs of a bridge circuit. It consists of a robust base, a wire or slide wire of known resistance, and a movable contact known as the pencil jockey to slide along the wire for accurate balancing. This apparatus is widely used in physics and electrical engineering laboratories for teaching and research purposes, helping students and technicians to understand the principles of Wheatstone bridge circuits and precise resistance measurements.
Description
Table of Contents
Toggle
Whetstone bridge with pencil jockey
Primary Uses
- Laboratory and Educational Applications
- Used to measure unknown electrical resistance with high accuracy in physics laboratories.
- Demonstrates the principle of the Wheatstone bridge circuit in educational settings.
- Facilitates calibration of resistors and electrical components.
- Supports experiments on circuit analysis, Ohm’s law, and electrical measurements.
- Enables students to learn practical skills in precision resistance measurement.
Secondary Uses
- Research and Industrial Applications
- Applied in research labs for precise measurement of resistance in materials and components.
- Used in electrical engineering for quality control and component testing.
- Employed in industrial settings for maintenance and troubleshooting of electrical circuits.
- Supports development of sensors and resistive components by providing accurate resistance values.
KEY PRODUCT FEATURES
1.Basic Identification Attributes
- Components: Wire or slide wire of known resistance, pencil jockey (movable contact), galvanometer, and known resistors.
- Material: Base typically made of wood or plastic, with metal contacts and wire.
- Size: Compact tabletop apparatus suitable for laboratory benches.
2.Physical & Chemical Properties
- Durability: Constructed to withstand repeated use in teaching and experimental labs.
- Conductivity: High-quality metal contacts ensure low resistance and accurate measurements.
- Precision: Fine adjustment possible through the pencil jockey for exact balancing.
3.Safety & Hazard Attributes
- Low voltage operation ensures safety during use.
- Avoid contact with exposed wires to prevent minor electrical shocks.
4.Storage & Handling Attributes
- Store in a dry, dust-free environment.
- Handle with care to avoid damage to the wire and contacts.
- Inspect for wire integrity and clean contacts before use.
5.Regulatory & Compliance Attributes
- Complies with laboratory educational equipment standards.
- Suitable for use in educational and research laboratories.
6.Environmental & Health Impact
- Made from recyclable materials where applicable.
- No hazardous substances involved in normal use.
SAFETY HANDLING PRECAUTIONS
Safety Handling Precautions
- Use as instructed to avoid damaging delicate components.
- Keep away from moisture to prevent corrosion of metal parts.
First Aid Measures
- No significant hazards; treat minor injuries from sharp components if any occur.
Firefighting Measures
- Non-flammable materials; use appropriate extinguishing media for surrounding fires.
Related products
Balance Electronic Ohaus Adventurer
The Balance Electronic Ohaus Adventurer is a high-precision electronic weighing instrument designed for laboratory, educational, and industrial applications. It offers accurate and reliable measurement with user-friendly features including a backlit display, multiple weighing units, and advanced calibration options. This balance is suitable for general weighing tasks, formulation, and quality control processes where precision and ease of use are critical.
Balance Mechanical Ohaus Centre
Balance Mechanical Ohaus Centre is a high-precision mechanical balance designed for laboratory and industrial use. Featuring a central zero adjustment, this balance enables accurate measurement of small to medium-weight samples with fine calibration control. Constructed with durable, corrosion-resistant materials, it delivers reliable and consistent weighing results without requiring electrical power. Its simple mechanical design ensures easy operation and maintenance, making it suitable for research laboratories, quality control departments, and industrial environments where precise manual weighing is essential.
Balance Mechanical Ohaus Triple Beam
The Balance Mechanical Ohaus Triple Beam is a precision manual weighing instrument designed for laboratory and industrial environments requiring accurate measurement of various sample masses. Featuring three adjustable beams for incremental weight measurement, it offers ease of calibration and durability with a robust metal construction. This mechanical balance operates without electricity, making it ideal for environments where power supply may be limited. Its reliable and repeatable measurements support diverse applications from research to quality control.
Balance Spring
The Balance Spring is a fundamental mechanical component used in balances and scales to measure weight through elastic deformation. It converts force into measurable displacement, enabling precise weight determination in various laboratory and industrial balances. Manufactured from high-quality, durable metals with excellent elastic properties, the balance spring ensures consistent performance and longevity under repeated use. It is essential for maintaining accuracy and reliability in mechanical weighing devices.
Charles law apparatus
Product Description
Charles Law Apparatus is a scientific device used to demonstrate and study Charles's Law, which states that the volume of a gas is directly proportional to its temperature at constant pressure. The apparatus typically consists of a sealed container connected to a graduated tube or syringe, allowing measurement of gas volume changes as temperature varies. It is widely used in physics and chemistry laboratories for educational and experimental purposes, helping users understand gas behavior under thermal changes.
Chemical balance weight box
The Chemical Balance Weight Box is a sturdy, protective container designed to store and organize standard balance weights used for chemical and laboratory measurements. Made from durable materials like wood, metal, or plastic, it ensures the secure keeping of precision weights, protecting them from dust, moisture, and damage. It is essential for maintaining the accuracy and longevity of laboratory weights.
Diode Mounted
Diode Mounted is a semiconductor component securely fixed onto a base or housing for stable operation in electronic and laboratory applications. These diodes are typically affixed to a heat sink, PCB, or specialized mount to facilitate thermal management, structural stability, and electrical connectivity. Mounted diodes are designed to ensure consistent current regulation, signal rectification, or light emission (in the case of LEDs) with enhanced performance and safety. These components are essential in laboratory test circuits, power supply systems, rectifier assemblies, and various instrumentation applications. Their mounted format makes them suitable for repeated testing, integration into complex systems, and controlled experimentation where component placement consistency is critical.
Litmus Paper Blue
Litmus Paper Blue is a pH indicator paper used to detect acidic substances. It is impregnated with litmus dye extracted from lichens, which changes color when exposed to acidic or basic environments. Blue litmus paper turns red under acidic conditions (pH < 4.5) and remains blue in neutral or alkaline solutions. It is widely used in laboratories, education, environmental testing, and industrial processes for quick and easy pH testing.

Preservatives(food)
Flavor Enhancers
Acidulants
Sweeteners
Antioxidants
Colorants(food)
Nutraceutical Ingredients (food)
Nutrient Supplements
Emulsifiers
Collectors
Dust Suppressants
Explosives and Blasting Agents
Flocculants and Coagulants
Frothers
Leaching Agents
pH Modifiers
Precious Metal Extraction Agents
Antioxidants(plastic)
Colorants (Pigments, Dyes)
Fillers and Reinforcements
Flame Retardants
Monomers
Plasticizers
Polymerization Initiators
Stabilizers (UV, Heat)
Antifoaming Agents
Chelating Agents
Coagulants and Flocculants
Corrosion Inhibitors
Disinfectants and Biocides
Oxidizing Agents
pH Adjusters
Scale Inhibitors( water)
Antioxidants(cosmetic)
Emollients
Fragrances and Essential Oils
Humectants
Preservatives
Surfactants(cosmetic)
Thickeners
UV Filters
Fertilizers
Soil Conditioners
Plant Growth Regulators
Animal Feed Additives
Biostimulants
Pesticides (Herbicides, Insecticides, Fungicides)
Active Pharmaceutical Ingredients (APIs)
Excipients
Solvents(pharmaceutical)
Antibiotics
Antiseptics and Disinfectants
Vaccine Adjuvants
Nutraceutical Ingredients (pharmaceutical)
Analgesics & Antipyretics
Analytical Reagents
Solvents(lab)
Chromatography Chemicals
Spectroscopy Reagents
microbiology-and-cell-culture-reagents
Molecular Biology Reagents
Biochemical Reagents
Inorganic and Organic Standards
Laboratory Safety Chemicals
Specialty Laboratory Chemicals(Special Laboratory Equipment)
Demulsifiers
Hydraulic Fracturing Fluids
Scale Inhibitors(oil)
Surfactants(oil)
Drilling Fluids
Dyes and Pigments
Bleaching Agents
Softening Agents
Finishing Agents
Antistatic Agents
Admixtures
Waterproofing Agents
Sealants and Adhesives
Curing Compounds
Concrete Repair Chemicals
Anti-Corrosion Coatings
Surfactants(cleaning)
Builders
Enzymes
Solvents (Cleaning)
Fragrances
Electronic Chemicals
Catalysts
Lubricants
Photographic Chemicals
Refrigerants
Automotive chemicals
Pyrotechnic Chemicals
Biodegradable Surfactants
Bio-based Solvents
Renewable Polymers
Carbon Capture Chemicals
Wastewater Treatment Chemicals
Pigments
Solvents(paint)
Specialty Coatings
Binders/Resins
Additives
Driers
Anti-Corrosion Agents
Functional Coatings
Application-Specific Coatings
Fresh Herbs
Ground Spices
Whole Spices
Spice Blends
Dried Herbs
Leavening Agents
Dough Conditioners
Flour Treatments
Fat Replacers
Decoratives
Preservatives(baking)
Plasticizers & Softeners
Reinforcing Agents
Adhesion Promoters
Vulcanizing Agents
Antidegradants
Blowing Agents
Fillers & Extenders
Accelerators & Retarders