Threshold gas detectors DG/A
New
New
Threshold detectors of toxic and combustible gases (also oxygen and refrigerants) with splash-proof construction with 4-20 mA connectivity
DG/A two-threshold detectors are designed to detect the presence of dangerous concentrations of explosive or toxic gases or vapors in the air in industrial, enclosed spaces. They feature a replaceable sensor module with two alarm thresholds (thresholds set at the production stage, with a built-in third threshold that is usually the upper recommended measurement range).
DG/A detectors have a passive 4-20 mA, 3-wire interface and are designed to work with MDP alarm modules or other control modules that accept devices with a passive (current-absorbing) output.
DG/A detectors are of standard design and cannot be used in areas classified as hazardous due to the presence of gases, vapors, or dust.
Features
- replaceable, intelligent semiconductor gas sensor;
- two alarm thresholds set at the production stage (the third threshold is usually the upper measurement range of the gas sensor, signaled only optically), 4-20 mA passive, 3-wire interface;
- built-in event history (analysis available from the manufacturer), indication of the recommended calibration period; built-in test procedure to recognize output cables (after power-up);
- thermal compensation system (can be used in variable environmental conditions);
- easy gas penetration through the sensor cover = relatively short detector response time;
- built-in optical signaling (multi-color LED);
- removable terminals with the possibility of mounting single and multi-wire cores (cable - without crimping sleeves);
- splash-proof IP44 gas sensor cover (in the recommended mounting position);
- can be equipped with a mechanical cover made of AR-1 profiled pipes (installation in areas exposed to mechanical damage, e.g., warehouses, wholesale stores, parking lots);
- can be equipped with a housing for installation on a ventilation duct (version DG/w);
- all detectors are calibrated in GAZEX Calibration Laboratory operating in accordance with the PN-EN ISO/IEC 17025 standard (PCA accreditation no. AP150).
Offered models
| Model | Gas sensor module | Sensor | Substance/property | Standard alarm thresholds | Measuring range | UoM | Supply voltage | |
|---|---|---|---|---|---|---|---|---|
| DG-A12/N | New | MS-12/N | Semiconductor |
Methane (CH4) |
10/30/(40) |
5—40 |
%LEL |
System powered |
| DG-A14/N | New | MS-14/N | Semiconductor |
Methane (CH4) |
10/30/(40) |
5—40 |
%LEL |
System powered |
| DG-A15/N | New | MS-15/N | Semiconductor |
Liquefied petroleum gas (LPG) |
10/30/(40) |
5—40 |
%LEL |
System powered |
| DG-A22L/N | New | MS-22/NL | Semiconductor |
Carbon monoxide (CO) |
20/100/(200) |
20—1000 |
ppm |
System powered |
| DG-A31/N | New | MS-31/N | Semiconductor |
Organic compounds |
20/40/(50) |
5—40 |
%LEL |
System powered |
| DG-A41/N | New | MS-41/N | Semiconductor |
Ammonia (NH3) |
500/1500/(2000) |
300—5000 |
ppm |
System powered |
| DG-A61/N | New | MS-61/N | Semiconductor |
R32 or R410A |
1000/2000/(2500) |
500—3000 |
ppm |
System powered |
| DG-A71/N | New | MS-71/N | Semiconductor |
Acetylene (C2H2) or Hydrogen (H2) |
10/30/(40) |
5—40 |
%LEL |
System powered |
| DG-A73/N | New | MS-73/N | Semiconductor |
Hydrogen (H2) |
10/30/(40) |
5—40 |
%LEL |
System powered |
| Model | Gas sensor module | Sensor | Substance/property | Standard alarm thresholds | Measuring range | UoM | Supply voltage | Contact control outputs | Voltage control outputs 12VDC | Two-state outputs (threshold) | Control output "Fault" | Output controlling the shut-off valve | Visual signalling, built-in | Acoustic signaling, built-in | Internal battery | Dimensions | Price excl. VAT | Price inc. VAT | C.g. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DG-A12/N | New | MS-12/N | Semiconductor |
Methane (CH4) |
10/30/(40) |
5—40 |
%LEL |
System powered | — | — | 2 | — | — | — | — | — | 110 x 153 x 60 mm | PLN769.00 | PLN945.87 | N |
| DG-A14/N | New | MS-14/N | Semiconductor |
Methane (CH4) |
10/30/(40) |
5—40 |
%LEL |
System powered | — | — | 2 | — | — | — | — | — | 110 x 153 x 60 mm | PLN769.00 | PLN945.87 | N |
| DG-A15/N | New | MS-15/N | Semiconductor |
Liquefied petroleum gas (LPG) |
10/30/(40) |
5—40 |
%LEL |
System powered | — | — | 2 | — | — | — | — | — | 110 x 153 x 60 mm | PLN769.00 | PLN945.87 | N |
| DG-A22L/N | New | MS-22/NL | Semiconductor |
Carbon monoxide (CO) |
20/100/(200) |
20—1000 |
ppm |
System powered | — | — | 2 | — | — | — | — | — | 110 x 153 x 60 mm | F | ||
| DG-A31/N | New | MS-31/N | Semiconductor |
Organic compounds |
20/40/(50) |
5—40 |
%LEL |
System powered | — | — | 2 | — | — | — | — | — | 110 x 153 x 60 mm | F | ||
| DG-A41/N | New | MS-41/N | Semiconductor |
Ammonia (NH3) |
500/1500/(2000) |
300—5000 |
ppm |
System powered | — | — | 2 | — | — | — | — | — | 110 x 153 x 60 mm | F | ||
| DG-A61/N | New | MS-61/N | Semiconductor |
R32 or R410A |
1000/2000/(2500) |
500—3000 |
ppm |
System powered | — | — | 2 | — | — | — | — | — | 110 x 153 x 60 mm | F | ||
| DG-A71/N | New | MS-71/N | Semiconductor |
Acetylene (C2H2) or Hydrogen (H2) |
10/30/(40) |
5—40 |
%LEL |
System powered | — | — | 2 | — | — | — | — | — | 110 x 153 x 60 mm | F | ||
| DG-A73/N | New | MS-73/N | Semiconductor |
Hydrogen (H2) |
10/30/(40) |
5—40 |
%LEL |
System powered | — | — | 2 | — | — | — | — | — | 110 x 153 x 60 mm | F | ||
Suggested products
Splash-proof enclosures to protect detectors from adverse weather conditions and mechanical damage
Profiled tube guards to protect the detector from direct mechanical damage
Test sets for verifying the correct operation of detectors by injecting a gaseous test mixture into the measuring chamber of the detector