Calculate absolute zero

The Digital Jolly Bulb is a gas law demonstration apparatus designed to show the relationship between pressure and temperature as described by Gay-Lussac’s Law. This modern version of the classic bulb-and-gauge setup features a built-in digital pressure display, allowing students to observe real-time pressure changes as temperature increases or decreases. Ideal for classroom demonstrations or quantitative gas law experiments, the Digital Jolly Bulb makes pressure–temperature investigations clear, visual, and easy to measure.

Why teachers love the Digital Jolly Bulb:

• Crystal-clear data, instantly – The built-in digital display provides direct pressure readings, eliminating parallax errors and helping students focus on how pressure changes with temperature—not struggling to read an analog gauge.
  
  

• Engaging, real-time demonstrations – It’s sensitive enough to show a pressure increase from simply holding the bulb, making it perfect for fast, memorable demos that spark curiosity.
  
  

• From demo to deep investigation – Submerge the bulb in water baths at different temperatures to collect quantitative data and calculate absolute zero, seamlessly supporting both conceptual understanding and rigorous lab work aligned to Gay-Lussac’s Law.