Adiabatic Gas Law Apparatus

Product Code: TD-8565


Adiabatic and isothermal processes are difficult for most introductory physics students to understand. PASCO’s Adiabatic Gas Law Apparatus provides the ideal dem­on­stra­tion for student learning.


PASCO’s Adiabatic Gas Law Apparatus can be used with our 850 Universal Interface. The computer functions as a 3-channel storage oscilloscope, generating graphs for pressure, temperature, and volume, as well as integrating the area under a Pressure vs. Volume curve to determine the work done on the gas.


  • Volume Transducer: A linear po­ten­tial divider is mounted on the side of the piston. A 5-Volt source from the comput­er is applied across the potentiometer element. The voltage from the com­mu­ta­tor brush on the cylinder is used to indicate the position of the piston and the volume of the confined gas.
  • Pressure Sensor: A solid-state, piezoresistive device that forms part of a bridge circuit is mounted at the base of the cylinder.
  • Temperature Sensor: Mounted in the cylinder on the top of the base. The active element is fine nickel wire with a high surface-to-mass ratio. The wire’s temperature changes rapidly as the gas compresses or expands.


  • Compare the final pressure and temperature: values predicted by the Adiabatic Gas Law.
  • Measure the work done on the gas: compare it to the change in internal energy and the theoretical work performed.
  • Determine gamma: the ratio of specific heats for the gas (Cp/Cv).
  • Use monatomic, diatomic and polyatomic gases: determine the effects of molecular structure on gamma.
  • Investigate isothermal com­pres­sion and expansion.

What’s Included

  • 1x Adiabatic Gas Law Apparatus
  • 1x Instruction Manual, Experiment Guide
  • 1x Signal Cables 3.5 mm plug to 5-pin DIN
  • 1x Power Adapter 9 V DC @ 1 A

Recommended Accessories

PASCO Capstone Software
850 Universal Interface UI-5000

Support Documents

Manual Downloads

Product Manuals for the Adiabatic Gas Law Apparatus (TD-8565)