The TSI IAQ-Calc 7545 is a professional indoor air quality monitor measuring CO₂, temperature, humidity, and carbon monoxide with built-in data logging. Ideal for HVAC assessments, IAQ investigations, and regulatory compliance.
TSI IAQ-Calc 7545 Indoor Air Quality Meter | CO2, CO, Temp & Humidity MonitorThe TSI IAQ-Calc 7545 Indoor Air Quality Meter is a versatile instrument for monitoring indoor environmental conditions across commercial, industrial and institutional settings. Designed to support professionals in HVAC commissioning, facilities management and occupational hygiene, it accurately measures carbon dioxide (CO2), carbon monoxide (CO), temperature and relative humidity – all critical for evaluating ventilation efficiency and indoor air quality compliance.
This model includes built-in data logging with memory for up to 38,000 samples, enabling comprehensive indoor air audits over time. It also calculates dew point, wet bulb temperature and percentage of outside air, which are essential for verifying airflow and ensuring buildings meet UK indoor air quality guidelines and EH40 workplace exposure limits.
With USB connectivity, a clear backlit display and free LogDat2 software, the IAQ-Calc 7545 offers a user-friendly solution for data capture, analysis and reporting, all in a compact and portable device.
At Frontline Safety UK, we supply genuine TSI instrumentation backed by expert support, helping ensure reliable and accurate monitoring for every project.
Key Features
Complies with UK indoor air quality assessment practices and EH40 exposure limits
Ideal for monitoring CO and CO2 levels in schools, offices and industrial environments
Calculates percentage of outside air for ventilation verfication
User-friendly interface with selectable measurement display
USB data transfer to PC for streamlined reporting
Includes free TSI LogDat2 software for data management
Long-life battery for extended field use
Lightweight and compact design for on-site portability
Model Number
7545
Measured Gases
Carbon dioxide (CO2), Carbon monoxide (CO)
Environmental Measurements
Temperature, Relative humidity
Calculated Parameters
Dew point, Wet bulb temperature, Percentage of outside air
CO2 Measurement Range
0 to 5000 ppm
CO2 Accuracy
±3.0% of reading or ±50 ppm (whichever is greater)
CO Measurement Range
0 to 500 ppm
CO Accuracy
±3.0% of reading or ±3 ppm (whichever is greater)
Temperature Range
-5 to 60 °C
Temperature Accuracy
±0.5 °C
Relative Humidity Range
5 to 95% RH (non-condensing)
Relative Humidity Accuracy
±3% RH
Display
Backlit LCD, displays up to 5 parameters simultaneously
Data Logging
Up to 38,000 samples with time and date stamp
Software Compatibility
TSI LogDat2 (included)
Data Export
USB interface to PC
Power Supply
4 x AA batteries or optional AC adapter
Battery Life
Up to 18 hours (alkaline)
Operating Temperature
0 to 60 °C
Storage Temperature
-40 to 70 °C
Operating Humidity
5 to 95% RH (non-condensing)
Product Dimensions (W x H x D)
8.4 × 18.3 × 4.4 cm
Product Weight
0.27 kg
Certifications
CE marked
Warranty
1 year
