The compact, heldheld CombuCheck™ monitor measures carbon monoxide, oxygen, nitric oxide, nitrogen dioxide, or sulfur dioxide combustion gases. This single gas monitor is an accurate, digital instrument that has five optional gas sensors that are interchangeable with a simple field calibration, the company says. Model 8750 has a built-in pump to provide a fast response to changes in gas concentration.

- TSI Inc.

St. Paul, MN