FSUE “SPA “Analitpribor” is one of the leaders of gas-analysis instrument engineering in the Russian Federation. Production of gas-analysis equipment is from 1960.

СТГ-3 – loop gas alarm of toxic and flammable gases

 
 

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,
mg/m3

Threshold 2,
mg/m3

Alarm generation times

СТГ-3-СО
СТГ-3-И-СО

СО

0 – 200

20

100

30

СТГ-3-H2S
СТГ-3-И-H2S

H2S

0 – 40

10

40

30

СТГ-3-SO2
СТГ-3-И-SO2

SO2

0 – 20

10

20

30

СТГ-3-Cl2 
СТГ-3-И-Cl2

Cl2

0 – 25

1

5

30

СТГ-3-NH3-20
СТГ-3-И-NH3-20

NH3

0 – 600

20

60

60

СТГ-3-NH3-500
СТГ-3-И-NH3-500

NH3

200 – 2000

-

500

60

СТГ-3-O2
СТГ-3-И-O2

O2

0 – 30 %vol

18 %vol

23%vol

30

СТГ-3-NO2
СТГ-3-И-NO2

NO2

0 – 10

2

10

30

СТГ-3-HCl
СТГ-3-И-HCl

HCl

5 – 30

5

5

60

СТГ-3-Eх
СТГ-3-И-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,
the rest 2W

Way of data transfer on gas contamination

 

for СТГ-3-И: 
through RS485 (protocol Modbus)
for СТГ-3: 
by means of optoelectronic relay for each of thresholds (40V, 0,2А)

Ambient temperature range

 

from -40 ºС to +50ºС
from -20 ºС to +50ºС (for versions СТГ-3-О2, СТГ-3-И-О2)

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:
КВВГЭ 4*1,5 (or similar one with outer diameter from 9 to 14mm)
for СТГ-3-И-ХХ:
МКЭШВ 2*2*1,5 (or similar one with outer diameter from 9 to 14mm)

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.

 

Technical characteristics
Certificates

  

 

 

On-site search

    Name search

    Subscribe to information distribution

    Projects development services

    СТГ-3 – loop gas alarm of toxic and flammable gases

     

    Copyright 2010. All rights reserved.
    Индекс цитирования