Sauermann CO110S - Handheld Carbon Monoxide Meter

• 6.5" (2m) cable (0 to 500 ppm and 0 + 50 degrees Celcius)
• Measuring range: CO: 0 to 500 ppm and temperature: -20 to +80°C 
• 2-line display

The Sauermann CO110S is a portable, handheld carbon monoxide (CO) meter with a 4-line display that allows you to easily measure carbon monoxide content in ambient air. Carbon monoxide can be a silent killer.

Operating principles

When CO goes through an electrolyte solution, it intercedes in the reactions of electrolyte and produces an increase of the quantity of produced electrons. The source electrons of a current which is around microampere are directly proportional to CO concentration.

Negative temperature coefficient probes are thermistors with a resistance that decreases with temperature according to the equation below:

RT = resistance sensor value at temperature T
R(T₀) = resistance sensor value at reference temperature T₀
T and T₀  in °C
α and T₀ sensor specific constants