IEQ Chek

IEQ Chek

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A versatile 7-sensor IAQ monitor
  • Simultaneous display of up to 7 measurements for efficient IAQ assessment
  • Smart plug ‘n play sensors for easy expandability in the field
  • All kits include hard carrying case for safe storage and transportation


The IEQ Chek™ is a handheld indoor air quality instrument capable of having 7 sensors installed simultaneously. Temperature and relative humidity sensors are always installed, with a selection of optional gas sensors including CO2, O2, CO, formaldehyde (HCHO), VOCs and others available. This superior flexibility makes the IEQ Chek™ ideal for monitoring air quality in incubators, offices, schools, hotels or other public spaces.

A large, backlit LCD shows all readings simultaneously and can store over 1 million readings using the optional SD card, which can then be analyzed and downloaded using Bacharach’s IQ Chek™ software. The IEQ Chek™ comes in a sturdy, hard-shell carrying case to protect your investment and is covered by a 2 year warranty (sensors are covered by a 1 year warranty).




Relative humidity

CO2 (optional)

Combustibles (optional)

VOCs (optional)

CO (optional)

O2 (optional)

NH3 (optional)

NO (optional)

NO2 (optional)

HCHO (optional)

SO2 (optional)

H2S (optional)


23 to 131 °F (-5 to 55 °C)

0 to 99.9% (non-condensing)

0 to 5000 ppm; 0 to 10,000 ppm; 0 to 5%; 0 to 20%; 0 to 100%

0 to 5% volume CH4

0 to 50 ppm; 0 to 300 ppm

0 to 50 ppm

0 to 25%

0 to 50 ppm

0 to 100 ppm

0 to 5 ppm

0 to 10 ppm

0 to 20 ppm

0 to 50 ppm


LCD with backlight, shows all readings simultaneously


3x AA batteries or via included wall adapter

Run Time

12 to 14 hours, depending on sensors installed and battery type (continuous using wall adapter)

Sampling Method

Diffusion or aspirated (pump)


> 1 million records (with optional SD card)

Size (H x W x D)

7.8 x 3.1 x 3.9 in. (19.8 x 7.9 x 9.9 cm)


20 oz. (567 g)

Operating Conditions

41 to 122 °F (5 to 50 °C), 0 to 99% RH (non-condensing), 1 ATM ± 10%

Warm-up Time

30 seconds


CE mark


Instrument: 2 years

Sensors: 1 year