Airline ALK-HW-03
personal, electrochemical gauge, the display, 0.01 to 2 ppm, a food: batteries
Rating: 
Brand
Brand history
Breathalyzer
Airline ALK-D-02
personal, semi-conductor gauge, the display, 0.01 to 1.9 ppm, power supply: batteries
Rating:
Airline ALK-L-01
personal, semi-conductor gauge, the display, 0.01 to 1.9 ppm, power supply: batteries
Rating: