Documentation-led reviews that separate verified specifications from marketing claims.
An indoor air quality meter and datalogger stating simultaneous PM2.5, CO2, temperature, humidity and a health index, with a large LED display and two tri-colour side bars for PM2.5 and CO2.
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A handheld carbon dioxide meter stating an NDIR sensor measuring 0 to 5,000 ppm, with simultaneous temperature, humidity, dew point and wet bulb, a datalogger and a backlit LCD.
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A handheld particulate monitor stating a second generation laser sensor with a 20,000 hour lifespan, PM2.5 and PM10 readings with colour health indicators and 12 hours of stored data shown as a histogram.
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A wired PM2.5, temperature and humidity monitor stating accuracy of 15 micrograms per cubic metre, 0.54 F and 3 percent relative humidity, with a two second correction interval and a four level LED indicator.
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A carbon dioxide monitor stating an SCD4x photoacoustic NDIR sensor with accuracy of 40 ppm plus 5 percent, a 5 second refresh, built-in pressure compensation and buzzer, app and email alerts.
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A portable electrochemical hydrogen sulfide monitor stating adjustable high and low alarms, a selectable buzzer, a backlit LCD with data hold and a clip for wearing.
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A rechargeable ammonia detector stating a 0 to 100 ppm range, a 4000 mAh battery giving over 60 hours, a TFT colour screen with dual display modes, maximum value hold and adjustable thresholds.
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A rechargeable combustible gas detector stating a 50 to 10,000 ppm detection range, a 17 inch bendable gooseneck, 0.5 second response, seven coloured bars with a 75 dB buzzer and over 3,000 recharge cycles.
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A pocket combustible gas detector stating LPG, methane, ethane, propane, butane, natural gas and coal gas, a 30 second warm-up in clean air, alarm within 0.5 to 3 seconds and five LEDs with a 75 dB alarm.
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A rechargeable portable carbon monoxide meter stating a DDS sensor with response within 0.3 seconds, a 0 to 1000 ppm range, two alarm thresholds, a TFT colour display and zero and standard gas calibration.
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A battery powered carbon monoxide alarm using an electrochemical sensor, stating an 85 decibel alarm, LED status indicators, two AA cells included and wall or tabletop use.
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A four gas confined space monitor for oxygen, carbon monoxide, hydrogen sulfide and combustibles, stating USA NIST calibration, factory calibration, zero and span calibration options and adjustable alarms.
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