Buying Guides

Research-based buying guides that compare the leading options by documented specifications, real use cases and value.

Get the CSV out, get it into a spreadsheet, and read the four shapes that matter.

Two measurements from one chart: the plateau tells you fresh air per person; the decay tells you air changes per hour.

Put every spec on the same footing: fixed plus percentage, at the same ppm, under the same conditions.

Breathing height, interior wall, a meter from people, away from vents and windows. Room-by-room placements.

Read the listing, look for the module, then do the sanitizer test. Three checks before you trust a number.

Check the monitor, check the placement, read the trend, then apply the bands. A four-step routine.

Big display, battery power, tamper-tolerant, and a color the whole class understands. What schools actually need.

Plug-in logging, exportable data and a display people can read from their desks. A step-by-step selection.

Where to put a gas alarm in a kitchen so it catches a range leak without false alarms, and which plug-in and sniffer models fit.

12V propane and dual LP/CO alarms rated for RV temperatures, compared on trip point, current draw, mounting and replacement dates.

Trade-grade sniffers compared: UEi CD100A, RIDGID CD-100, Klein ET120, Amprobe GSD600 and the rechargeable TopTes PT760.

Propane sinks, so the detector goes low. Listed 12V RV alarms, a plug-in home combination unit and a sniffer for the regulator.