The perfect gas pressure sensor for all chemical and biological experiments. Your students can now discover the gas laws for themselves. Charles', Boyle's, and Gay-Lussac's laws are all ready to recreate. Many biological activities such as respiration, transpiration, and fermentation involve the production of a gas, and can be measured using the gas pressure sensor. Pressure range is 210 kpa with a maximum of 4 atm. Analog sensor.