As plumbing and heating professionals become increasingly aware of the dangers of CO while on the job, new products make it easier to raise alarms in dangerous environments.
Jim Davis, veteran CO tester, teacher and combustion mentor for National Comfort Institute, advocates wearing such devices, and always carries his CO stick monitor when he evaluates buildings and mechanical rooms. The model 317-3 CO stick from Testo Inc. detects the presence of CO and warns the wearer both visually and audibly. It doesn't require any zeroing - just turn it on - and it features a self-test mode to verify the CO sensor without the need for test gas.