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SC75 CO2 Sensor

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The SC75 CO2 Sensor can measure indoor CO2 concentrations in order to determine indoor air quality (IAQ). The SC75 offers a dual-mode power option, allowing the sensor to use an AC wall adapter for best performance, or up to 4 months operation using the built-in battery at a slower sample rate. By placing SC75 sensors in building spaces, ASHRAE IAQ performance can be easily monitored and verified.




What's Included:

  • SC75 CO2 Sensor
  • 1/2AA lithium battery (installed)
  • A/C wall transformer


  • Measures 0-5% ambient CO2 levels
  • Dual power options: either AC wall powered, or battery powered
  • With AC wall power, provides down to 5 second sample rate
  • With battery power, provides down to a 2 minute sample rate
  • Low power design - Battery powered sensor provides installation location flexibility
  • Battery life expectancy – 4 months operating on only battery power
  • Compact size convenient for easy installation
  • Industry leading data storage – up to 120 Billion points
  • Powerful DataRecorder software included to chart, log, monitor all individual sensors
  • HaloCloud service for access to remote sensor data and configuration from anywhere including from Tablets, Smart Phones, Remote PCs
  • Programmable individual sensor alarm set points and alarm notification via email or Text message with HaloCloud service
  • Complete setup requires one System Gateway (GWx series). Add sensors as needed with scalable system and gateways capable of handling hundreds of sensors at a single location
  • Compliant to RoHS Directive 2002/95/EC

Application Examples:

  • Energy Management, Auditing, Monitoring, Analytics
  • HVAC Systems
  • Building Air Quality
  • Environmental Data Acquisition and Studies
  • Medical /Pharmaceutical
  • Hospitals
  • Employee Safety
  • Greenhouses and Plant Growth Solutions
  • R&D

Model Number SC75
Measurement Channels CO2
Sensor Internal 0-5% CO2 NDIR sensor
Measurement Range 0-5% (0-5000ppm)
Units %, ppm
Sample Rate 10 Hz to 32 Hrs
Sensor Response Time (90%) Approx. 3 min
Resolution 0.02% (±20ppm)
Calibrated Accuracy ±0.1% (±100ppm)
Digital I/O Channels N/A
Temporary Sensor Memory 1000 data points
Long -term Memory (using Gateway): Up to 120 billion data points
LED Indicator Green, power and programming indicator
Required Interface Package Gateway (GWx series)
Wireless Data Security AES-256 Encryption
Radio Power 250mW
RF Carrier Frequency 902-928 MHz
RF Transmit Data Rate Auto-adjusting 32-196kbps
Hopping Channels 25
Modulation GFSK
Transmit Power 20dBm
Receiver Sensitivity -110dBm typical
Range (Line of sight) Up to 1700’ (0.3 Miles)
Range (Typical indoors) Up to 150'
Power Requirements A/C power or battery (std 1/2AA lithium)
Typical Battery Life 4 months without A/C power (10 years with A/C power)
Enclosure Material Ruggedized polycarbonate plastic
Upgradable Firmware Yes
Indoor/Outdoor Indoor
Operating Environment -40~ 85°C (-40~ 185°F); 0~95%RH non-condensing using lithium batteries
Dimensions 70x45x22 (mm) (2.76" x 1.77" x 1.73")
Weight 6oz. with batteries
Approvals US(FCC), CA(IC)
Warranty One (1) year parts and service
Order Online:
USA Office

Address: 1480 Gulf Road, Suite 837,
PO Box 1280
Point Roberts, WA 98281

Western Canada - Vancouver BC

Tel:1.800.663.6001 or 1.604.925.6150
Address: 2454 Haywood Ave
West Vancouver, BC V7V 1Y1

Eastern Canada - Markham, Ontario

Tel:1.800.465.0164 or 1.905.513.7027