| Power Supply |  | 12-30VDC/24VAC(1), 100mA max. | 
| Analog Outputs | Dual Analog | 3-wire 4-20mA and 0-5V/0-10V (2) (jumper) | 
| Output scaling | 0 - 2000 or 0 - 5000 ppm (selectable) | 
| Set-point Relay | Programmable | Solid-state, 1A @ 30VAC/DC, N.O. | 
| Sensor Performance | Type | Non-dispersive Infrared (NDIR) | 
| Accuracy (Standard) | ±30ppm, ±3% of reading (400-2000ppm), @-10-50°C, 0-85%RH ±50ppm, ±5% of reading (2000-5000ppm), @-10-50°C, 0-85%RH ±100ppm, ±10% of reading (5000-10000ppm), @ 0-50°C, 0-85%RH | 
| Accuracy (Dual Channel) | ±30ppm, ±3% of reading (400-2000ppm), @ 0-50°C, 0-85%RH ±50ppm, ±3% of reading (2000-5000ppm), @-10-50°C, 0-85%RH ±100ppm, ±10% of reading (5000-10000ppm), @ 0-50°C, 0-85%RH | 
| Drift with ABC disabled (standard) | 35 ppm/month | 
| Drift with ABC disabled (Dual Channel) | 5 ppm/month | 
| Pressure Dependency | +1% reading per kPa (0.143PSI) deviation from nominal (101kPa,14.7PSI) | 
| Response time | 60 seconds to 90% reading | 
| Sample rate | 1 second | 
| Output update rate | 1 second | 
| Element Operating Environment | 4 to 122°F (-20 to 50°C), 0 to 95% RH | 
| LCD Menu Setup Parameters | SPH, Setpoint, Hi (On point) | 500ppm to full-scale (800ppm default) | 
| SPL, Setpoint, Lo (Off point) | 400ppm to full-scale-50 (700ppm default) | 
| SCL, Scaling | 0-2000ppm, 0-5000ppm, 0-10000ppm (2000ppm default) | 
| ADJ, Adjustment | Offset adjustment +/-250ppm (0 default) | 
| CAL, Calibration mode | Automatic mode ON or OFF (default=ON) | 
| RUN, Run mode | Displays CO2 in ppm | 
| Operating Environment | Temperature | 14 to 122F (-10 to 50C) | 
| Humidity | 0-95% non-condensing | 
| Enclosure | Material | ABS/Polycarbonate | 
| Dimensions | 4.0’ h x 4.4”w x 2.1”d (+6.8” probe) |