|
|
|
Gas analyzers ДАК are designed for continuous, automatic measurement of pre-explosive concentrations of methane (СН4), hydrocarbons including vapors of oil and oil products, associated petroleum gas, alcohols and also volume fraction of carbon dioxide (СО2).
Application:
01. Monitoring of air of working areas of premises and open spaces of explosive and fire-hazardous chemical, petrochemical and oil-refining productions;
02. Operation as a part of atmosphere monitoring system of hazardous industrial objects.
Type of gas analyzer – fixed.
Principle of measurement – optical absorbing.
Sampling – by diffusion.
Material of enclosure - aluminium / stainless steel.
Basic technical characteristics
|
Designation |
Measurement unit |
Calibration component |
Measuring range on calibration component |
Type of output signal |
Operating temperature |
|
ДАК-СО2-026 |
volume fraction, % |
carbon dioxide |
0 – 4* |
4-20 mА |
from -40 to +80 |
|
ДАК-СН4-027 |
% LEL |
methane |
0 – 100 |
4-20 mА |
from -40 to +80 |
|
ДАК-СН4-029 |
% LEL |
methane |
0 – 100 |
4-20 mА |
from -60 до +60 |
|
ДАК-ΣСН-030 |
% LEL |
propane |
0 – 100 |
4-20 mА |
from -60 to +60 |
|
ДАК-СО2-031 |
volume fraction, % |
carbon dioxide |
0 – 4* |
4-20 mА |
from -40 to +80 |
|
ДАК-СН4-032 |
% LEL |
methane |
0 – 100 |
4-20 mА |
from -40 to +80 |
|
ДАК-ΣСН-033 |
% LEL |
propane |
0 – 100 |
4-20 mА |
from -40 to +60 |
|
ДАК-СО2-035 |
volume fraction, % |
carbon dioxide |
0 – 4* |
4-20 mА |
from -40 to +80 |
|
ДАК-СН4-036 |
% LEL |
methane |
0 – 100 |
4-20 mА |
from -40 to +80 |
|
ДАК-СН4-037 |
% LEL |
methane |
0 – 100 |
4-20 mА |
from -60 to +90 |
|
ДАК-ΣСН-038 |
% LEL |
propane |
0 – 100 |
4-20 mА |
from -60 to +60 |
* Measuring range of gas analyzers ДАК-СО2 is determined when order is made.
Measured components:
01. ДАК-СН4 СН4; С6Н6; С7Н8; СН3-С(О)-СН3; С2Н4; diesel fuel according to ГОСТ 305-82;
natural gas according to ГОСТ 5542-87;
02. ДАК-ΣCH С3H8; C2H6; C4H10; C5H12; C6H14; C8H18; СН3ОН; С2Н5ОН;
white spirit according to ГОСТ 3134-78; jet fuel according to
ГОСТ 10227-86; liquefied gas according to ГОСТ 20448‑90;
automobile petrol according to ТР ТС 013/2011; aviation petrol according to ГОСТ 1012-72;
unleaded petrol according to ГОСТ Р 51866-2002; kerosene; oil according to ГОСТ Р 51858-2002.
Additional technical characteristics
|
Characteristics |
Values |
Remarks |
|
Explosion protection marking |
1Exd[ib]IIСT4 X/ 1Exd[ib]IIBT4 X 1ExdIIBT4 |
ДАК-31 …-33 ДАК-26, -27, -29, -30, -34 …-38 |
|
Degree of enclosure protection |
IP 66 |
|
|
Power consumed, W, not more |
3,5 |
ДАК-37 - 6,0 |
|
Limits of intrinsic error |
±(2,5+0,05·Свх) |
for ДАК ΣСН, СН4 |
|
Readings setting time Т0,9, s |
10 |
|
|
Interval between verifications, months |
24 |
|
|
Overall dimensions (LхWхH), mm |
200х130х300 |
weight 4,0 kg |
Distinctive features
01. Wide temperature range (from -60 to +90оС);
02. Application in the conditions of the Extreme North;
03. Availability of analog, relay and digital, HART outputs;
04. Monitoring of vapors of oil products (petrol, kerosene, diesel fuel etc.);
05. Constant diagnostics of sensor, monitoring of optics contamination;
06. Heating of measuring element, using of filter for dust and moisture protection;
07. Setting of sensors of own production into gas analyzers.
Secondary power supply and alarm units БПС-21М are used for power of gas analyzers ДАК.
Gas analyzers ДАК are supplied with the set of cable gland (for armored cable, metal hose, tubing) on special order.
