This glass manometer tube is ideal for demonstrating gas exchange and respiration experiments in secondary schools and colleges. It provides a clear and reliable way for students to observe pressure changes, supporting hands-on science learning. The tube is securely mounted on a clear acrylic panel with a locking bar, making it easy to align graph paper for accurate measurements.

• Dimensions: (H)140mm x (W)70mm
• Capillary bore: 2mm
• Mounted on clear acrylic panel for stability
• Locking bar allows easy attachment of graph paper
• Suitable for constructing simple respirometers
• Coloured solution not included; use diluted food colouring