Specifications

77
GMP 111 & GMP 111E CO
2
Transmitters
for Industrial Applications
FEATURES / BENEFITS
 Excellent long term stability
 High accuracy
 Operates in demanding environments
 Low cost
 Operates over full relative humidity range
 Optional digital display
RELIABLE LOW COST SENSOR
Vaisalas GMP 111 and GMP 111E use a single
wavelength non-dispersive infrared (NDIR) gas
sensor for CO
2
-specific gas sensing. Other gases,
including water vapor, do not affect its performance,
nor is it adversely affected by high concentrations of
CO
2
. The transmitters provide high accuracy and
excellent long-term stability with low power con-
sumption. This long term stability reduces the costs
associated with the replacement of other types of CO
2
sensors. The sensor is diffusion aspirated, (the CO
2
gas enters the sensor through a gas permeable
membrane). This silent sampling method is reliable
and provides rapid response time.
VERSATILE AND EASY TO USE
The GMP 111 and GMP 111E are low cost CO
2
transmitters designed for a wide variety of
applications including: environmental, agricultural,
process, and ventilation monitoring and control. The
GMP 111s measurement range is 0 to 3000 ppm
carbon dioxide, and the GMP 111Es range is 0 to
7000 ppm. These transmitters provide user selectable
4 to 20 mA, 0 to 20 mA and 0 to 10 V linear outputs
and include a relay output with selectable switching
levels of 400, 600, 800, or 1000 PPM (GMP 111) and
1000, 2000, 3000, or 5000 ppm (GMP 111E). The
nominal supply voltage for the transmitter is 24 VDC.
These transmitters are rated NEMA 12 and can meet
NEMA 4 requirements with the addition of an
optional splash shield around the diffusion tube.
APPLICATIONS
Environmental chambers
HVAC (DCV, Energy Management)
Industrial process control
Laboratories
Food processing/packaging
Breweries/wineries
Greenhouses
Mushroom growing
GMP 111 and GMP 111E:
Shown with standard enclosure and
with optional GMI 111 digital display.
GMP 111
GMP 111E