General features

Measurement principle:

Non Dispersive   Infra-Red (NDIR), dual wavelength

Measurement range:

dependent on model –   see list

Gas supply:

by perfusion

Dimensions:

Length (model   dependent) x 28 mm x 42 mm (L x W x H)

Gas line connectors:

3 mm internal, 5mm   outer diameter

Technical features @   25°C, 1013 mbar gas pressure, 0.5 l/min constant gas flow

Response time (t90):

Appr. 15 s (at 0.5   l/min)

Resolution:

1 ppm to 0.01 Vol.% FS

Accuracy:

≤ ±2 % FS

Long term stability   (zero):

≤ ±2 % FS 1 over 12   month period

Long term stability   (span):

≤ ±2 % FS over 12   month period

Repeatability:

≤ ±2 % FS

Linearity error:

≤ ±1 % FS

Lower detection limit:   ≤ 1 % FS (typically)

Operating temperature:

-10 °C to 40 °C

Storage temperature:

-20 °C to 60 °C

Humidity:

0 % to 95 % rel.   humidity (not condensing)

Temp. dependence   (zero):

≤ ±0.01 % FS per °C

Temp. dependence   (span):

≤ ±0.2 % FS per °C

Air pressure:

950 to 1050 mbar

Pressure dependence   (span):

0.1 % to 0.2 % per   mbar

Warm-up time:

< 2 minutes (start   up time)
  < 30 minutes (full specification)

Flow rate:

0.2 - 1.5 l/min

Communication

Digital output signal:

Modbus ASCII via UART

Electrical data

Supply voltage:

6 V DC ± 5 %

Supply current:

70 mA average, max.   140 mA

Power consumption:

< 1 Watt