TSI's IAQ-CALC® Meters
are outstanding instruments for investigating and monitoring indoor air quality
(IAQ). The Model 7515 is a cost-effective meter for carbon dioxide (CO2)
measurements. The Model 7535 adds data logging of CO2. 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).
Features
and Benefits
- Low-drift
NDIR CO2 sensor for stable, accurate readings
- Sampling
function records multiple point measurements
- Ergonomic,
overmolded case design
| Applications
- Verify building HVAC system
performance
- Examine building IAQ conditions
to optimize worker productivity
- Comply with
regulations and guidelines
| | 
| Model
Comparison
|
|
7515
| 7525
| 7535
| 7545
| | CO2
| x
|
x
|
x
|
x
|
| CO
|
|
|
|
x
|
| Temperature
|
|
x
|
|
x
|
| Humidity
%RH |
|
x
|
|
x
|
| %
Outside Air |
|
x
|
|
x
|
| Dew
Point |
|
x
|
|
x
|
| Wet
Bulb temperature |
|
x
|
|
x
|
| Data
Logging/Downloading |
|
x
|
x
|
x
|
| Statistics
| x
|
x
|
x
|
x |
| Review
Data |
|
x
|
x
|
x
|
| Calibration
Certificate | x
|
x
|
x
|
x
|
|
Specifications
- IAQ-CALC
Models
7515, 7525, 7535, 7545
| CO2 | | Sensor
Type | Dual-wavelength
NDIR (non-dispersive infrared) | | Range
| 0
to 5000 ppm | | Accuracy
| ±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
| ±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 | 40
to 113°F (5 to 45°C) | | Storage
Temperature | -4
to 140°F (-20 to 60°C) |
| Logging
Capability (Models 7525 and 7545) |
| Ranges
| Model
7525 logs up to 30,300 data points with key (3) measured parameters enabled
Model 7535 logs up to 40,300 data points with key (1) measured parameters enabled
Model 7545 logs up to 26,900 data points with key (4) 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) | 3.3
in. x 7.0 in. x 1.8 in. (8.4 cm x 17.8 cm x 4.4 cm) |
| Probe
Dimensions (Model 7515) |
| Length
| 2.75
in. (7.0 cm) | | Diameter |
0.75
in. (1.9 cm) |
| Probe
Dimensions (Models 7525, 7535, and 7545) |
| Length
| 7.0
in. (17.8 cm) | | Diameter
| 0.75
in. (1.9 cm) | | Weight
(with batteries) | 0.6
lbs (0.27 kg) |
| Power
Requirements | | Model
7515 | Four
AA-size batteries | | Models
7525, 7535, and 7545 | Four
AA-size batteries or AC adapter | |
|
