TSI 7545 Iaq-Calc Indoor Air Quality Meters

CO2

Sensor Type Dual-wavelength NDIR

(non-dispersive infrared)

Range 0 to 5,000 ppm

Accuracy1 ±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 0 to 60°C (32 to 140°F)

Accuracy ±0.5°C (±1.0°F)

Resolution 0.1°C (0.1°F)

Response Time 30 seconds (90% of final value, air

velocity at 2 m/s [400 ft/min])

Relative Humidity (Models 7525 and 7545)

Sensor Type Thin-film capacitive

Range 5% to 95% RH

Accuracy2 ±3.0% RH

Resolution 0.1% RH

Response Time 20 seconds (for 63% of final value)

Percentage 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