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Designed for audible and light alarm generation when harmful substances (СО, H2S, SO2, Cl2, NH3, NO2, HCl), oxygen volume fraction (О2), flammable gases (natural and liquefied) in the air of working areas exceed the preset threshold values.
Application:
- Monitoring of atmosphere of community premises equipped with heating systems, cooling installations, garages and autoparkings, heat and power engineering facilities, collectors and tunnels;
- utilities and other industrial objects, where leakage of toxic and flammable gases are possible.
Principle of operation - electrochemical and thermochemical.
Type of gas alarms - fixed.
Sampling - diffusion.
Mode of operation - continuous.
Basic technical characteristics
|
Name |
Measured component |
Measuring range, mg/m3 |
Threshold 1, |
Threshold 2, |
Alarm generation time, s |
|
СТГ-3-СО |
СО |
0 – 200 |
20 |
100 |
30 |
|
СТГ-3-H2S |
H2S |
0 – 40 |
10 |
40 |
30 |
|
СТГ-3-SO2 |
SO2 |
0 – 20 |
10 |
20 |
30 |
|
СТГ-3-Cl2 |
Cl2 |
0 – 25 |
1 |
5 |
30 |
|
СТГ-3-NH3-20 |
NH3 |
0 – 600 |
20 |
60 |
60 |
|
СТГ-3-NH3-500 |
NH3 |
200 – 2000 |
- |
500 |
60 |
|
СТГ-3-O2 |
O2 |
0 – 30 %vol |
18 %vol |
23%vol |
30 |
|
СТГ-3-NO2 |
NO2 |
0 – 10 |
2 |
10 |
30 |
|
СТГ-3-HCl |
HCl |
5 – 30 |
5 |
5 |
60 |
|
СТГ-3-Eх |
Eх |
0 – 50 % LEL |
10 |
20 |
15 |
Additional technical characteristics
|
Characteristics |
Values |
|
Supply voltage |
from dc source with output voltage 10 up to 36V or from power supply and alarm unit БПС-3, БПС-3-И |
|
Consumed power |
СТГ-3-Ех, СТГ-3-И-Ех- 3W, |
|
Way of data transfer on gas contamination
|
for СТГ-3-И: |
|
Ambient temperature range
|
from -40 ºС to +50ºС |
|
Degree of protection against moisture and dust |
IP65 (assembled with connection box) |
|
Overall dimensions / weight |
200mm*135mm*180mm / 0,8kg |
|
Length of communication line |
up to 1000m |
|
Cable for mounting
|
for СТГ-3-ХХ: |
|
Lifetime of sensor |
3 years |
Note that on special order СТГ-3-И can be manufactured without audible alarm, and also with use of clamping screw of unstainable metals. This function is applied at the object with increased corrosive medium (poultry factories, pig complexes etc.).
Distinctive features
- loop connection of sensors (four-wire line for 2 threshold systems, three-wire line for 1 threshold systems);
- possibility of simultaneous monitoring of toxic and flammable gases in voluntary combination;
- possibility of connection on one loop to БПС-3 up to 16 sensors for PEC(pre-explosive concentration) or 30 sensors for MPC of working area or sensors combination (calculated on consumed power;
- length of communication line up to 1 000 m;
- possibility to transfer data on concentration of measured gases through RS485 indicating sensor address for СТГ-3-И;
- light (for all) and audible (for СТГ-3-И) alarm in place of sensors installation;
- sensor demounting without violation of loops integrity;
- connection boxes КСГ and КСГИ allow to calibrate gas alarms by means of key «iButton» without demounting of gas alarms from the place of installation.
