Review on Extech CO15 Carbon Monoxide 🔬 Meter – Enhanced SEO-friendly Product Name by Paul Mac

build quality is normal. Definitely not premium as the plastic looks a bit cheap. The case is almost twice the size it needs to be (is there a reason it has to be so BIG?). From a functional point of view, this works perfectly. I tested it at the end of the tailpipe and it registered between 25 and 70ppm of CO (the maximum is automatically set to 70ppm so I know the upper range is 70ppm). Features: (1) The maximum CO value is automatically recorded (can be reset). )(2) CO threshold alarm (alarm sounds when CO setpoint is reached)(3) thermometer(4) backlight (not backlit but side lit) There are only two buttons: (1) light button and (2) ON / OFF button The functions described above can only be used with these two buttons! Don't worry, the user manual has pretty clear and easy to understand instructions. However, here are the instructions changed from the original (a bit longer, but I think clearer): - Turn device on/off Short press the power button to toggle between ON and OFF - Set the CO threshold signal. When the device is off, press and hold the power button and release the button when the desired CO threshold is displayed. - Turn on/off the backlight. Short press the light button to toggle between ON and OFF - Set the temperature units. Press and hold the light button during the meter's initial setup/self-test (when the meter is first turned on). During this time, the numbers on the LCD display will flash. - Reset the maximum CO value. In normal operating mode, press and hold the backlight button. it should be.