Vaisala INTERCAP HMDW80 SERIES Especificaciones descargar pdf (Pagina 144)

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142

GMW115 Carbon Dioxide Transmitter for

Demand Controlled Ventilation

The Vaisala CARBOCAP

®

Carbon Dioxide Transmitter GMW115 is a wall-mounted

CO

2

transmitter for demand controlled ventilation.

The wall-mounted Vaisala

CARBOCAP

®

Carbon Dioxide

Transmitter GMW115 is a compact

transmitter for measuring room

carbon dioxide levels in building

automation applications.

Room carbon dioxide level is an

indicator for indoor air quality and

human presence. It can be used to

steer ventilation to introduce an

adequate (but not excess) air flow

based on the true need for fresh air.

Demand controlled ventilation is

well suited to buildings and premises

where occupancy varies. Examples

of such facilities are schools, offices,

meeting rooms, auditoriums, and

sports arenas.

The GMW115 transmitter is designed

for indoor use in various demand

Features/Benefits

▪

Compact, wall-mounted

transmitter for demand

controlled ventilation

▪

Incorporates Vaisala

CARBOCAP®, the silicon based

NDIR sensor with unique

internal referencing

▪

Advanced, single-beam, dual

wavelength measurement with

no moving parts

▪

Excellent long-term stability

▪

Ideal for ventilation control in

all types of occupied spaces

controlled applications. The

transmitter is easy to install and

needs practically no maintenance.

There are two optional ranges of

0…2 000 ppm and 0…5 000 ppm to

select from.

Proven Performance with

the Vaisala CARBOCAP®

Sensor

The GMW115 transmitter uses Vaisala

CARBOCAP

®

carbon dioxide sensor, a

silicon-based infrared (IR) absorption

sensor. The excellent long-term

stability of the CARBOCAP

®

sensor

results from its unique measurement

technology. The sensor features

an electrically tunable Fabry-Perot

Interferometer for built-in reference

measurement. The sensor not

only measures CO

2

absorption but

also a reference, which makes it

possible to compensate for potential

light intensity variations and

contamination and dirt accumulation

in the optical path, making the sensor

extremely stable over time.

CARBOCAP sensor has no need

for any compensation algorithms

that are used in more simple

sensors to compensate for their

drift. In buildings with around-the-

clock occupancy (e.g. hospitals,

manufacturing facilities, residential

buildings, and retirement homes) the

compensations based on assumed

background carbon dioxide level

simply do not work.

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