TGas-1021 Series Toxic and Harmful Gas Transmitter with two-wire system has embedded microprocessor, it can continuously measure the site gas concentration, and convert the concentration signal into 4~20mA output. It is extensively applied in petroleum, petrochemistry, chemical industry, gas, coal, metallurgy and electric power; safety detection in municipal administration, communication and traffic tunnel construction; electronics, semiconductor industry and other places with poisonous and harmful gases, etc.
Main features
l Quick response speed
l Automatic modification of zero drift
l Intrinsic safety certification
l With infrared remote control, it can be set without opening cover
l High measurement accuracy
Technical parameters
|
Parameter
|
Characteristics
|
|
Detection
|
Single gas detector
|
|
Operation
|
Push-key or remote controller
|
|
Calibration
|
Users can perform linear calibration operation
|
|
Sensor
|
Plug-in electrochemical sensor
|
|
Display
|
Six- segment code liquid crystal digit-display reading
|
|
Reading
|
Display gas composition/concentration after starting up self-checking
|
|
Output signal
|
Output 16-bit precision 4-20mA current by means of two-wire system, and the output size can be defined by users
|
|
Working temperature
|
-30℃ to 60℃, humidity below 85% (no condensation)
|
|
Operating voltage
|
24V
|
|
Precision
|
Measurement error <5%, repeatability <3%
|
|
Impedance
|
200 ohm
|
|
Measurement category and range
|
Refer to table of lectotype
|
|
Service life of sensor
|
Poisonous gas ≥3 years, oxygen ≥2 years, ammonia ≥1 year
|
|
Power supply of detector
|
Power shall be supplied to the detector by safety grid, explosion-proof mark of safety grid: ExiaⅡC
Intrinsic safety parameter of safety grid: Um:250V Uo:28V Io:93V Po:0.65W
Lo:2.4mH Co:0.03μF
|
|
|
|
Table of lectotype for detecting gas (part of gas)
|
Model
|
Instrument description
|
|
TGas-1021-CO-1000
|
CO detector (range: 0-1000ppm) ex-factory setting current low point 0, high point 1000
|
|
TGas-1021-CO-500
|
CO detector (range: 0-500ppm) ex-factory setting current low point 0, high point 500
|
|
TGas-1021-H2S-100
|
H2S detector (range: 0-100ppm) ex-factory setting current low point 0, high point 100
|
|
TGas-1021-SO2-100
|
SO2 detector (range: 0-100ppm) ex-factory setting current low point 0, high point 100
|
|
TGas-1021-CL2-50
|
Cl2 detector (range: 0-50.0ppm) ex-factory setting current low point 0, high point 50
|
|
TGas-1021-HCN-30
|
HCN detector (range: 0-30.0ppm) ex-factory setting current low point 0, high point 30
|
|
TGas-1021-NO2-100
|
NO2 detector (range: 0-100ppm) ex-factory setting current low point 0, high point 100
|
|
TGas-1021-NH3-100
|
NH3 detector (range: 0-100ppm) ex-factory setting current low point 0, high point 100
|
|
TGas-1021-PH3-5
|
PH3 detector (range: 0-5.0ppm) ex-factory setting current low point 0.00, high point 5.00
|
|
TGas-1021-O3-1
|
O3 detector (range: 0-1.0ppm) ex-factory setting current low point 0.01, high point 1.00
|
|
TGs-1021-ClO2-1
|
ClO2 detector (range: 0-1.0ppm) ex-factory setting current low point 0.00, high point 1.00
|
Executed standard
Note: GB standard is Chinese National Standard
GB12358-2006 Gas monitors and alarms for workplace--General technical requirements
GB3836.4-2000 Electrical apparatus for explosive gas atmospheres--art 4 intrinsic safety "i"
GB3836.1-2000 Electrical apparatus for explosive gas atmospheres--Part 1 General requirements
Explosion-proof mark: ExiaIICT3, it applies to 0 zone, 1 zone and 2 zone, the place that contains IIA～IIC category and T1～T3 group of explosive gas mixture, and is qualified to get explosion-proof conformity certificate through inspection by CQST.