Forcemeter, Tubular Balance - Newton Meter

A Tubular Push-Pull Balance (or Newton Meter) is a dual-function spring scale designed to measure both tensile (pulling) and compressive (pushing) forces. Unlike standard spring balances that only have a hook for hanging weights, these models feature a central plunger rod that allows for force to be applied from either end, making them essential for a wider variety of physics and dynamics experiments.

Core Functionality

• Dual Measurement: Most models are dual-calibrated to show Mass (grams/kilograms) and Force (Newtons).
• Push and Pull Actions: Equipped with a top ring and bottom hook for pulling, and a dedicated internal plunger for measuring pushing forces.
• Transparent Design: Often constructed from clear acrylic so students can observe the internal spring mechanism in action, which helps visualize Hooke’s Law.

Key Features for Lab Use

• Zero-Point Calibration: Most feature an adjustable tab or nut at the top to reset the pointer to zero before use.
• Accuracy: High-quality educational models typically offer an accuracy of approximately 1% of full scale.
• Durability: Built with impact-resistant plastic and stainless steel springs to withstand frequent classroom handling.

Common Ranges and Color Coding

To prevent over-extension and ensure accuracy, these balances are often color-coded by their maximum capacity:

• 1kg/10N Beige
• 250g/2.5N Blue
• 2kg/20N Red
• 3kg/30N White
• 500g/5N Green
• 5kg/50N Yellow