Specifications
83
DIFFERENT CONFIGURATIONS TO MEET
YOUR DEMANDING APPLICATIONS
The GMM 220 series modules are designed for
Original Equipment Manufacturers (OEMs) needing
CO
2
measurements in demanding applications.
These modules are optimized for integration into
equipment for such applications as greenhouse
control, incubators, fermentors, and safety alarming.
These modules provide high CO
2
measurement
accuracy and long term stability over wide tempera-
ture and relative humidity ranges. For example,
long-term stability is better than plus/minus 5% of
full-scale readings over a two-year period.
GMM 221 - for Accurate CO
2
Measurements
From 0% to 20%
This module can be ordered from Vaisala with a
detachable probe, 100 mm in length, which has
been calibrated to operate within one of the five
following concentration ranges:
0 to 2% CO
2
0 to 3%
0 to 5%
0 to 10%
0 to 20%
These probes are directly detachable from the
cable and are interchangeable in the field. For
example, different probes, each calibrated to a
different range, can be swapped in the field to
meet different application requirements.
GMM 222 - for Accurate CO
2
Measurements
Up To 10,000 ppm (1%)
This module can be ordered from Vaisala with a
detachable probe, 145 mm in length, which has
been calibrated to operate within one of the four
following concentration ranges:
0 to 3000 ppm CO
2
0 to 5000 ppm
0 to 7000 ppm
0 to 10000 ppm
These probes are also directly detachable from the
cable and are interchangeable in the field. For
example, different probes, each calibrated to a
different range, can be swapped in the field to
meet different application requirements.
Different Cable Lengths and Connectors
- Cables available in 0.6 and two meter lengths
- Connectors between the probe and cable are
available in two configurations, straight and
90°, to facilitate ease of installation and
increase application flexibility
GMM 220 Series Carbon Dioxide Modules
for Demanding OEM Applications
Versatile Design, Interchangeable Probes
The field interchangeability of the GMM 221 and 222
make calibration and field service easy. It is also easy
to change the measurement range in the field by
simply replacing one probe with another.
Different mounting, power supply, and output
options are available.
CARBOCAP THE SILICON-BASED CO
2
SENSOR
The functioning of the CARBOCAP sensor is based
on the absorption of infrared light using a patented
leading-edge silicon technology. This solid state
sensor provides a reliable and stable constant
reference measurement, resulting in excellent
stability over time, even with wide temperature
variations. Since water vapor, dust, and most
chemicals do not effect the measurement, the GMM
220 series modules can be used in harsh and humid
environments.
GMM 221