FPI Fixed Gas Detector for VOCs,Oxygen,toxic gases,carbon dioxide,methane etc0 pages

GT

Fixed Gas Detectors
FPI offers a rich gas detector portfolio that developed on electrochemical, catalytic combustion,
photo ionization and infrared technologies. The GT series gas detectors are used to monitor
flammable and toxic gases, oxygen, carbon dioxide, VOCs and other inorganic gases. The gas
detectors can make a valuable contribution to the safety of various industries. They can be used to
trigger alarms if a specified concentration of the gas or vapor is exceeded. This can provide an
early warning of a problem and help to ensure people's safety.

Principles

Type of Sensor
There are a number of different types of sensors used for gas detection. The choice of sensor
depends on:
gas to be detected;
the

the expected range of concentration;

whether the detector is fixed or portable;

whether the detector is point or open path;

the presence of other gases that may affect readings or damage the sensor.

Key Features
Sensor Principle

Integrated design and adaptable for
harsh conditions
Fast and reliable detection for several
gases down to ppm, %LEL level
Easy handling and programmable with
remote controller or built-in keys
Standard 4-20mA, RS 485, HART output
Visual and audible alarms
One-key calibration

Catalytic
combustion

The operating principle is that heat is generated during the catalyzed reaction between
the gas and oxygen in air. The resulting rise in temperature of the catalyst bead causes a
change in electrical resistance of a platinum wire embedded in the bead, also acting as
the heater, which is a measure of gas concentration.
Combustible gas detection, 0~100%LEL
Product model: GT-1030/1031-TF, and GT-1030/1031-TS, etc.

Electrochemical

The operating principle is that the gas diffuses through a permeable electrode to its
interface with the cell's electrolyte. Here electrochemical reactions take place which
alter the electrical characteristics of this electrode. Measurement of these electrical
parameters with respect to other electrodes within the cell give a signal proportional to
the gas concentration.
Oxygen and toxic gas detection, in ppm level

Application Areas

Product model: GT-1121, GT-1020-DF, and GT-1020-TF, etc.

Agriculture
Large-scale cultivating workshop
CO2 detection in greenhouse
Biogas digester

Metallurgy
Coal gas detection
Coke making, iron making and steel making
Hot rolling, cold rolling and acid cleaning
Confined space

Petroleum and Petrochemical

Pipeline

The operating principle is that an ionized gas will conduct an electrical current in
proportion to the number of ions present. Hydrocarbon gases and vapors are easily
ionized and the current flow produced is easily measured.
Photo Ionization

VOCs and some inorganic gas detection, in ppm level
Product model: GT-1040.

Oilfield operation district
Well drilling platform
Natural gas purification
Oil&gas transportation & distribution
Refinery production process
Refined oil storage

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Leak point in pipeline
Regulator station, pressure regulating
box, gate well
Boiler gas
Hotel kitchen
Sewage treatment

The operating principle is based on the absorption of infrared light by certain molecules
which are detected by a decrease in transmitted radiation over a beam path.
Infrared

Detect CO 2 and methane, and halohydrocarbon gas such as chloromethane
Product model: GT-1020-IR, and GT-1030/1031-IR.

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INDUSTRR SAFETY