Bacharach IEQ Chek 1540-0009 Indoor Environment Quality Monitor with CO2 0-20% sensor - DISCONTINUED


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  • 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
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Able to have 7 sensors installed simultaneously, Bacharach has introduced their 1540-0009 IEQ Chek Indoor Environmental Quality Monitor with CO2 0-20% sensor.


The handheld IEQ Chek is equipped with CO2 0-20% sensor and optional O2, CO, formaldehyde (HCHO), VOC and other gas sensors are available for purchase. The expansive, backlit LCD concurrently displays all readings and the instrument can store over 1 million readings with the optional SD card. Subsequent data can then be scrutinized and downloaded with the Bacharach IQ Chek software.


Supplied with a durable, hard-shell carry case and 2 year warranty, the IEQ Chek from Bacharach is the complete device for monitoring air quality in a range of industries.




  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

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