Macurco 5 percent volume CO2 calibration gas cylinder for field span calibration of Macurco CO2 detectors including the CD-6 series.

Key features

• Calibration gas concentration: 5 percent CO2 by volume, balance nitrogen or air per the cylinder label
• Sized for portable use during scheduled maintenance and post-sensor-replacement recalibration
• Compatible with standard Macurco calibration regulator and tubing kit (sold separately)
• Used to verify CO2 sensor response at a known span point above typical ambient levels
• Cylinder shelf life is printed on the label; expired gas should not be used for calibration of life-safety detectors

The Macurco 5 percent CO2 calibration cylinder is consumed during periodic field calibration of CD-6B, CD-6G, and related Macurco CO2 monitoring devices. NDIR CO2 sensors drift over time and require span verification on the schedule defined by the host facility, the AHJ, or ASHRAE 62.1 demand-controlled ventilation commissioning procedures. The 5 percent concentration is above the alarm thresholds typical for parking garage and brewery applications, making it suitable for both span verification and full-scale check. Confirm regulator compatibility and cylinder connection thread before ordering, since Macurco kits use a non-DOT calibration regulator.

Verify panel/device family compatibility before ordering.