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IAQ-CALC Indoor Air Quality Meters from Kenelec Scientific

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article image IAQ-CALC Meters

Models 7515, 7525, and 7545:

TSI’s IAQ-CALC Meters are good instruments for investigating and monitoring indoor air quality (IAQ). The Model 7515 is a cost-effective meter for carbon dioxide (CO2) measurements.

The Models 7525 and 7545 simultaneously measure and data log multiple parameters. The Model 7525 measures CO2, temperature, humidity, and calculates dew point, wet bulb temperature, and % outside air. The Model 7545 adds carbon monoxide (CO).

Application:

  • Verify building HVAC system performance
  • Examine building IAQ conditions to optimize worker productivity
  • Comply with regulations and guidelines

Features and benefits:

  • Low-drift NDIR CO2 sensor for stable, accurate readings
  • Sampling function records multiple point measurements
  • Ergonomic, overmolded case design

Models 7525 and 7545:

  • Temperature and relative humidity measurements help determine thermal comfort
  • Calculates % outside air from either CO2 or temperature
  • Directly calculates dew point and wet bulb temperatures
  • Electrochemical sensor measures CO (Model 7545)
  • Models 7525 and 7545 shows up to three parameters
  • Model 7515 shows only one parameter

Specifications:

CO2

  • Sensor type: dual-wavelength NDIR (non-dispersive infrared)
  • Range: 0 to 5000 ppm
  • Accuracy: 1 ±3.0% of reading or ±50 ppm, whichever is greater
  • Resolution: 1 ppm
  • Response Time: 20 seconds

Temperature (Models 7525 and 7545):

  • Sensor Type: Thermistor
  • Range 32 to 140°F (0 to 60°C)
  • Accuracy ±1.0°F (±0.6°C)
  • Resolution: 0.1°F (0.1°C)
  • Response time: 30 seconds (90% of final value, air velocity at 400 ft/min [2 m/s])

Relative Humidity (Models 7525 and 7545):

  • Sensor Type: Thin-film capacitive
  • Range: 5% to 95% RH
  • Accuracy: 2 ±3.0% RH
  • Resolution: 0.1% RH
  • Response Time: 20 seconds (for 63% of final value)

% outside air (Models 7525 and 7545):

  • Range: 0 to 100%
  • Resolution: 0.1%

CO (Model 7545 only):

  • Sensor type: electro-chemical
  • Range: 0 to 500 ppm
  • Accuracy: ±3.0% of reading or ±3 ppm, whichever is greater
  • Resolution: 0.1 ppm
  • Response time: <60 seconds to 90% step change

Operating temperature:

  • 32 to 113°F (0 to 45°C)

Storage temperature:

  • -4 to 158°F (-20 to 70°C)

Logging Capability (Models 7525 and 7545):

  • Ranges: Model 7525 logs up to 24,200 data points with all measured parameters enabled Model 7545 logs up to 22,000 data points with all measured parameters enabled.
  • Time constant: 1 sec, 5 sec, 10 sec, 20 sec, 30 sec (user selectable)
  • Log intervals: 1 second up to 1 hour (user selectable)

Meter dimensions (all models):

  • 4.2 in. x 7.2 in. x 1.5 in. (107 mm x 183 mm x 38 mm)

Probe dimensions (Model 7515):

  • Length: 2.7 in. (69 cm)
  • Diameter: 0.76 in. (2.0 cm)

Probe dimensions (Models 7525, and 7545):

  • Length: 5.9 in. (15.1 cm)
  • Diameter: 0.74 in. (1.9 cm)

Weight (with batteries):

  • Model 7515 - 0.6 lbs (0.27 kg)
  • Models 7525 and 7545 - 1.16 lbs (0.53 kg)

Power requirements:

  • Model 7515 - Four AA-size batteries
  • Model 7525 and 7545- Four AA-size batteries or AC adapter

Data Logging-Models 7525, and 7545:

  • Simultaneously records all parameters and logs samples with time and date stamp

Model 7525 logs up to 24,200 data points with all measured parameters enabled

Model 7545 logs up to 22,000 data points with all measured parameters enabled

  • TSI LogDat2TM software permits easy transfer of data to a computer
  • Data can be reviewed on-screen, or downloaded to a computer for easy report generation
  • Statistics function displays average, maximum and minimum values, and the number of recorded samples

IAQ-CALC Indoor Air Quality Meters are available from Kenelec Scientific.

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