A5F+

MEASUREMENT
Operating Principle: 4-electrode electrochemical
Nominal Range: 0 to 10,000 ppm CO
Maximum Overload: 20,000 ppm CO
Filter: To remove acid gases
Filter Capacity: > 275,000 ppm hours (900 ppm NO @ 200 ml/min)
Auxiliary Electrode: To compensate for maximum 2000 ppm H2 cross interference
Sensitivity: 60 ± 20 nA/ppm
Response Time (T90): < 30 seconds
Typical Net Range Baseline (clean air): -2 to +17 ppm CO equivalent
Typical Net Baseline Shift (+20°C to +40°C): 5 ppm CO equivalent
Repeatability: < 1% of signal
Linearity: Linear

ELECTRICAL
Resolution: Electronics dependent 1 ppm (based on City Technology recommended circuitry)
Recommended Load Resistor: 10 Ω
Bias Voltage: 0 mV or 250 mV

MECHANICAL
Housing Material: ABS
Weight: 13 g (nominal)
Orientation Sensitivity: None

ENVIRONMENTAL
Operating Temperature Range: -20°C to +50°C
Storage Temperature: 0°C to +20°C
Operating Pressure Range: Atmospheric ± 10%
Pressure Coefficient: 0.010% signal / mbar
Relative Humidity Range: 15% to 90% non-condensing

LIFETIME
Long Term Output Drift: < 2% signal loss per month
Expected Operating Life: 3 years in air
Storage Life: 6 months in original packaging