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Product Features
  • Low-drift NDIR CO2 sensor for stable, accurate readings

  • Sampling function records multiple point measurements

  • Ergonomic, over-moulded case design

Delivery options

At Cadmus Products we aim to deliver orders efficiently and at highly competitive rates. 

  • We can ship consignments of all shapes and sizes and hazardous content across the UK and worldwide. Most of our orders are sent via DHL, however sometimes we may use other couriers.
  • If you are purchasing a laboratory product online you can find out the price of shipping checkout. If you are obtaining a quote for a product, then we will email you
    with our best shipping prices along with your quote.
  • Please see our delivery page for full information

Note: This product has a lead time of 5-6 weeks.

For monitoring indoor air quality, the TSI Airflow IAQ-Calc 7515 Indoor Air Quality Meter provides highly accurate carbon dioxide measurements. The TSI IAQ 7515 carbon dioxide tester is ideal for assuring compliance with IAQ rules by validating HVAC system performance, conducting indoor air quality evaluations, measuring carbon dioxide concentration levels, and analysing ventilation systems. For reliable and accurate readings up to 5000 ppm, the IAQ-Calc CO2 metre incorporates a low-drift NDIR CO2 sensor. Indoor air quality and CO2 levels are a crucial element in maximising worker productivity, and businesses are growing increasingly interested in monitoring these variables.


- Verify building HVAC system performance

- Examine building IAQ conditions to optimize worker productivity

- Comply with regulations and guidelines

Included Items:

- Instrument

- Hard carrying-case

- (4) AA alkaline batteries

- Operation and service manual

- NIST calibration certificate

TSI Airflow IAQ Calc 7515 Indoor Air Quality Meter

CO₂ Range

0 to 5000 ppm

CO₂ Accuracy

±3% of reading or ±50 ppm, whichever is greater

CO₂ Resolution

1 ppm

CO₂ Sensor Type

Non-Dispersive Infrared (NDIR)

Operating Temperature

41 to 113 °F (5 to 45 °C) @ <80% RH, non-condensing

Storage Temperature

-4 to 140 °F (-20 to 60 °C) @ <80% RH, non-condensing

Power Supply

4 x AA batteries or AC adapter

Probe Length

2.75 in. (7.0 cm)

Probe Diameter

0.75 in. (1.9 cm)


3.3 x 9.6 x 1.8 in. (8.4 x 24.4 x 4.4 cm)


0.6 lbs. (0.27 kg)


Part Numbers


IAQ Meter, CO2


IAQ meter, CO2 with accredited calibration

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