Product Specifications
Accurate measurement with non-dispersive infrared (NDIR) carbon dioxide (CO2) sensors
Logging multi-point measurements via sampling function
Ergonomic, custom-moulded hard carrying case
Product Documents
NOVEL · Product and System Solutions
TSI IAQ-Calc™ Series
Occupational Safety and Environmental Measuring Instruments
Air Quality Monitoring Instrument and Environmental Analyser
The TSI IAQ-Calc™ Series is an outstanding choice for indoor air quality monitoring studies. Model 7515 is an economical option for carbon dioxide (CO2) measurement. Models 7525 and 7545 provide continuous measurement while featuring data logging capability. Model 7525 measures carbon dioxide (CO2), temperature, and humidity; alongside these, it performs dew point, wet bulb temperature, and outdoor air percentage calculations. Model 7545 measures carbon monoxide (CO) in addition to all these features.
Technical Specifications
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Carbon dioxide (CO2) |
|
|---|---|
| Sensor Type | Non-Dispersive Infrared (NDIR) |
| Range | 0-5,000 ppm |
| Accuracy | 3% of reading or ±50 ppm, whichever is greater (at 25°C) |
| Resolution | 1ppm |
| Response Time | 20 seconds |
Temperature (Models 7525 and 7545 Only) |
|
|---|---|
| Sensor Type | Thermistor |
| Range | 0 - 60°C |
| Accuracy | ±0.5°C |
| Resolution | 0.1°C |
| Response Time | 30 seconds (for 90% of final value, at 2 m/s air velocity) |
Relative Humidity (Models 7525 and 7545 Only) |
|
|---|---|
| Sensor Type | Thin-film Capacitive |
| Range | 5% to 95% relative humidity |
| Accuracy | ±3% |
| Resolution | 0.1% |
| Response Time | 20 seconds (for 63% of final value) |
% Outside Air (Models 7525 and 7545 Only) |
|
|---|---|
| Range | 0-100% |
| Resolution | 0.1% |
Carbon Monoxide (CO) (Model 7545 Only) |
|
|---|---|
| Sensor Type | Electrochemical |
| Range | 0-500 ppm |
| Accuracy | 3% of reading or ±3 ppm, whichever is greater |
| Resolution | 0.1ppm |
| Response Time | <60 seconds (for 90% of final value) |
| Operating Temperature | 5°C to 45°C |
Data Logging (Models 7525 and 7545 Only) |
|
|---|---|
| Capacities | Model 7525: Can log 30,300 data points. Model 7545: Can log 26,900 data points. |
| Logging Intervals | 1 s - 5 s - 10 s - 20 s - 30 s |
| Time Constants | 1 s - 1 hr |
| Dimensions and Weight | 84 x 178 x 44 mm, Weight: 0.27 kg |
Sampling Probe Dimensions |
|
|---|---|
| 7515 | Length: 70 mm, Diameter: 19 mm |
| 7525 and 7545 | Length: 178 mm, Diameter: 19 mm |
Battery Specifications |
|
|---|---|
| 7515 | 4xAA Alkaline Battery |
| 7525 and 7545 | 4xAA Alkaline Battery or AC adapter |
Measurement and Standards Approach
Parameters to be measured in indoor air quality assessment should be selected based on intended use, building type, and source of complaint. Indoor building parameter standards such as EN 16798-1 should be evaluated alongside relevant national legislation and project criteria. Instrument data must not be interpreted on their own as a health diagnosis or regulatory compliance verdict.
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Brand and support in Turkey: TSI Turkey — NOVEL Ltd., Sole Authorised Distributor of TSI in Turkey. Please review the brand page for brand product lines, related instruments, and technical support details.
Notice: The technical information, product specifications and images on this page are based on manufacturer publications. The manufacturer may change specifications without notice. For current specifications or assistance in selecting a suitable product for your application, please contact NOVEL at info@novel.com.tr .
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