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Features:
• Stable, low-drift NDIR CO2 sensor
• Sampling function records multiple point measurements
• Ergonomic, overmolded case design
Additional Features Models 7525 & 7545:
• Temperature and relative humidity measurements are instrumental for determining thermal comfort levels
• Calculates % outside air from either CO2 or temperature readings
• Direct calculation of dew point, wet bulb temperatures
• Electrochemical sensor for CO measurements (Model 7545 only)
• Display up to three parameters Models 7525, 7535 & 7545:
• LogDat2™ software permits easy transfer of data to a computer
• Data can be reviewed onscreen or downloaded to a computer for easy report
generation
• Statistics function displays average, maximum and minimum values, and the
number of recorded samples
Specifications:
CO2 (all models)
Sensor Type: Dual-channel, non-dispersive infrared (NDIR)
Range: 0 to 5000 ppm
Resolution: 1 ppm
Accuracy: ±3% rdg. or ±50 ppm, whichever is greater
TEMPERATURE (Models 7525 & 7545)
Sensor Type: Thermistor
Range: 32 to 140°F (0 to 60°C)
Resolution: 0.1°F (0.1°C)
Accuracy: ±1.0°F (±0.6°C)
RELATIVE HUMIDITY (Models 7525 & 7545)
Sensor Type: Thin-film capacitive
Range: 5 to 95% RH
Resolution: 0.1% RH
Accuracy: ±3.0% RH
CO (Model 7545 only)
Sensor Type: Electro-chemical
Range: 0 to 500 ppm
Resolution: 0.1 ppm
Accuracy: ±3% rdg. or 3 ppm, whichever is greater
GENERAL
Logging Capability: 7525: 30,300 data points w/ 3 parameters enabled
7535: 40,300 data points w/ 1 parameter enabled
7545: 26,900 data points w/ 4 parameters enabled
Log Intervals: 1 second up to 1 hour
Time Constant: 1s, 5s, 10s, 20s, 30s
Power Supply: 4 x AA-size 1.5V batteries
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