Research-based buying guides that compare the leading options by documented specifications, real use cases and value.
Both measure PM2.5 with temperature and humidity. The H5106 states PM2.5 accuracy of 15 micrograms per cubic metre and a two second refresh; the S1 states a laser particle sensor and an AQI display.
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Both state CO2, VOC, humidity, temperature and pressure over Bluetooth. The Wave Plus adds radon; the Wave Enhance drops radon and adds noise and light sensors.
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The View Plus adds PM2.5, CO2, VOC and pressure to radon on WiFi. The Corentium Home 2 is a Bluetooth radon monitor with temperature and humidity and nothing else.
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The SwitchBot states a Swiss NDIR sensor with 50 ppm accuracy across 400 to 9,000 ppm updating every second. The GoveeLife states an SCD4x photoacoustic NDIR sensor at 40 ppm plus 5 percent with pressure compensation.
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The IQAir bundle pairs an indoor unit with a weatherproof outdoor monitor stating two laser sensors. The Qingping Gen 2 states seven indoor metrics on a 4 inch touchscreen with a replaceable particulate sensor.
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Both state a Sensirion carbon dioxide sensor. The Qingping states WiFi with remote monitoring and a rechargeable battery; the Temtop states a 3.3 inch screen and up to 70 days of battery in eco mode.
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The View Radon states WiFi, an eInk display, alerts and up to three years of battery. The Aranet states a reading every ten minutes and up to seven years on two AA cells, plus pressure.
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The Aranet states a reading every ten minutes and up to seven years on two AA cells, plus temperature, humidity and pressure. The Corentium Home 2 states the original Corentium sensor with Bluetooth, temperature and humidity.
Read Guide→Both are Airthings radon monitors with humidity and temperature. The View Radon states WiFi, an eInk display showing up to four values and up to three years of battery; the Corentium Home 2 states Bluetooth and the original sensor lineage.
Read Guide→The View Plus states radon, PM2.5, CO2, VOC, humidity, temperature and pressure. The H5140 states an SCD4x photoacoustic NDIR carbon dioxide sensor with accuracy of 40 ppm plus 5 percent.
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The 902 FC states 200 microamp DC for flame rods, resistance to 60 kilohms for thermistors and flue gas temperature capture. The EX623A states 600 A AC and DC, dual type K inputs, a built-in infrared thermometer and LoZ.
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Both state 400 A AC current, 600 V AC and DC voltage, 4 kilohm resistance, True RMS and a 30 mm jaw. The 325 adds frequency, temperature and capacitance.
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