Threshold gas detectors DG/MR
Threshold detectors of toxic and combustible gases (also oxygen and refrigerants) with splash-proof construction, RS-485 bus connectivity, and relay outputs
Digital DG/MR detectors are designed for continuous monitoring of gases in enclosed spaces. When preset concentration values are exceeded, the detector’s optical alarm signaling is activated, built-in relays change their state and information is transmitted to a digital control module using a RS-485 network. The detectors are designed for work in the Digital Gas Detection System.
The detectors have an exchangeable module with a semiconductor, electrochemical, or optical sensor (Infra-Red). The interchangeability of the gas sensor modules facilitates maintenance, simplifies calibration and reduces operating costs.
The DG/MR detectors cannot be used in areas classified as explosive atmospheres of gases, vapours or dust.
Area of application
- industrial plants, logistics centres, public facilities;
- extensive rooms at risk of toxic or explosive gas emissions with locally controlled sirens.
Features
- communication, control and transmission of information through the port in RS-485 standard, with MODBUS RTU protocol;
- two alarm thresholds or measurement mode (for electrochemical sensors and Infra-Red);
- two built-in relays with NO/NC contact, on a removable board (for A1 and A2 status);
- sensor in replaceable intelligent module (replaceable with DG/F and DG/P);
- sensor can be selected for the application;
- short detector response time;
- built-in control microprocessor means reliable and stable operation;
- thermal compensation system;
- history of alarm states;
- semi-automatic addressing in digital network (without opening the housing);
- screwless terminals, removable, with possibility of connecting two FTP wires;
- selective LED optical optimization;
- two cable entries – easy connection of successive detectors (loop-through);
- optionally, the possibility of being equipped with an additional casing made of steel pipes (AR-1d) or a casing for ventilation ducts (DG/w version);
- configuration of detector settings via dedicated configuration software „DETnet View”, available at https://www.gazex.com/en/software/;
- all detectors are calibrated in our own GAZEX Calibration Laboratory operating in accordance with PN-EN ISO/IEC 17025 (PCA accreditation no. AP150).
Block diagram
Offered models
| Model | Gas sensor module | Sensor | Substance/property | Standard alarm thresholds or measuring range | Supply voltage | Net price | C.g. | ||
|---|---|---|---|---|---|---|---|---|---|
| DG-12/MR |
|
MS-12/N | Semiconductor |
Methane (CH4) |
10/30 |
%LEL |
24VDC | PLN849.00 | S |
| DG-14/MR |
|
MS-14/N | Semiconductor |
Methane (CH4) |
10/30 |
%LEL |
24VDC | PLN849.00 | S |
| DG-15/MR |
|
MS-15/N | Semiconductor |
Liquefied petroleum gas (LPG) |
10/30 |
%LEL |
24VDC | PLN849.00 | S |
| DG-22L/MR |
|
MS-22/NL | Semiconductor |
Carbon monoxide (CO) |
20/100 |
ppm |
24VDC | PLN899.00 | N |
| DG-31/MR |
|
MS-31/N | Semiconductor |
Organic compounds |
20/40 |
%LEL |
24VDC | PLN1,099.00 | N |
| DG-41/MR |
|
MS-41/N | Semiconductor |
Ammonia (NH3) |
500/1500 |
ppm |
24VDC | PLN899.00 | N |
| DG-61/MR |
|
MS-61/N | Semiconductor |
Refrigerant R32 or Refrigerant R410A |
1000/2000 |
ppm |
24VDC | PLN899.00 | N |
| DG-71/MR |
|
MS-71/N | Semiconductor |
Acetylene (C2H2) or Hydrogen (H2) |
10/30 |
%LEL |
24VDC | PLN899.00 | N |
| DG-73/MR |
|
MS-73/N | Semiconductor |
Hydrogen (H2) |
10/30 |
%LEL |
24VDC | PLN899.00 | S |
| DG-1KL/MR |
|
MS-1KL/N | Catalytic |
Methane (CH4) |
10/30 |
%LEL |
24VDC | PLN1,279.00 | N |
| DG-1KL4/MR |
|
MS-1KL4/N | Catalytic |
Methane (CH4) |
10/30 |
%LEL |
24VDC | PLN1,179.00 | N |
| DG-1KL5/MR |
|
MS-1KL5/N | Catalytic |
Liquefied petroleum gas (LPG) |
10/30 |
%LEL |
24VDC | PLN1,179.00 | N |
| DG-7KL3/MR |
|
MS-7KL3/N | Catalytic |
Hydrogen (H2) |
10/30 |
%LEL |
24VDC | PLN1,179.00 | N |
| DG-0E.CL2/MR |
|
MS-0E.CL2/N | Electrochemical |
Chlorine (Cl2) |
1/3 |
ppm |
24VDC | F | |
| DG-0E.CLO2/MR |
|
MS-0E.CLO2/N | Electrochemical |
Chlorine dioxide (ClO2) |
0,1/0,3 (TWA/STEL) |
ppm |
24VDC | F | |
| DG-0E.ETO/MR |
|
MS-0E.ETO/N | Electrochemical |
Ethylene oxide (C2H4O) |
2/5 |
ppm |
24VDC | F | |
| DG-0E.HCL/MR |
|
MS-0E.HCL/N | Electrochemical |
Hydrogen chloride (HCl) |
3,4/6,8 (TWA/STEL) |
ppm |
24VDC | F | |
| DG-0E.NO2/MR |
|
MS-0E.NO2/N | Electrochemical |
Nitrogen dioxide (NO2) |
1/3 |
ppm |
24VDC | F | |
| DG-0E.O3/MR |
|
MS-0E.O3/N | Electrochemical |
Ozone (O3) |
0,2/0,3 |
ppm |
24VDC | F | |
| DG-0E.SO2/MR |
|
MS-0E.SO2/N | Electrochemical |
Sulfur dioxide (SO2) |
0.5/1 (TWA/STEL) |
ppm |
24VDC | F | |
| DG-2E/MR |
|
MS-2E/N | Electrochemical |
Carbon monoxide (CO) |
20/100 |
ppm |
24VDC | PLN1,279.00 | N |
| DG-4E/MR |
|
MS-4E/N | Electrochemical |
Ammonia (NH3) |
500/800 |
ppm |
24VDC | PLN1,279.00 | N |
| DG-4E1/MR |
|
MS-4E/N1 | Electrochemical |
Ammonia (NH3) |
20/40 (TWA/STEL) |
ppm |
24VDC | PLN1,279.00 | N |
| DG-4E2/MR |
|
MS-4E/N2 | Electrochemical |
Ammonia (NH3) |
20/40 (TWA/STEL) |
ppm |
24VDC | PLN1,549.00 | N |
| DG-5E/MR |
|
MS-5E/N | Electrochemical |
Hydrogen sulfide (H2S) |
5/10 (TWA/STEL) |
ppm |
24VDC | PLN1,279.00 | N |
| DG-7E/MR |
|
MS-7E/N | Electrochemical |
Hydrogen (H2) |
500/800 |
ppm |
24VDC | PLN1,279.00 | N |
| DG-9E5/MR |
|
MS-9E5/N | Electrochemical |
Oxygen (O2) |
19/18 |
%v/v |
24VDC | PLN1,279.00 | N |
| DG-1R2/MR |
|
MS-1R2/N | Infra-red |
Methane (CH4) |
10/30 |
%LEL |
24VDC | PLN2,079.00 | S |
| DG-1R5/MR |
|
MS-1R5/N | Infra-red |
Liquefied petroleum gas (LPG) |
10/30 |
%LEL |
24VDC | PLN2,079.00 | S |
| DG-3R/MR |
|
MS-3R/N | Infra-red |
Organic compounds |
20/40 |
%LEL |
24VDC | PLN2,279.00 | N |
| DG-6R7/MR |
|
MS-6R7/N | Infra-red |
Refrigerant R32 or Refrigerant R410A |
500/1500 |
ppm |
24VDC | PLN3,329.00 | N |
| DG-6R7/MR-SF6 |
|
MS-6R7/N-SF6 | Infra-red |
Sulfur hexafluoride (SF6) |
500/1500 |
ppm |
24VDC | PLN3,329.00 | N |
| DG-8R/MR |
|
MS-8R/N | Infra-red |
Carbon dioxide (CO2) |
0,5/1,5 |
%v/v |
24VDC | PLN2,079.00 | N |
| DG-8R8/MR |
|
MS-8R8/N | Infra-red |
Carbon dioxide (CO2) |
0,5/1,5 |
%v/v |
24VDC | PLN1,489.00 | S |
| Model | Gas sensor module | Sensor | Substance/property | Standard alarm thresholds or measuring range | Supply voltage | Contact control outputs | Voltage control outputs 12VDC | Two-state outputs (threshold) | Control output "Fault" | Output controlling the shut-off valve | Output in 4-20mA standard | Output in 0-10V standard | Output in 2-10V standard | Output in RS-485 standard | Visual signalling, built-in | Acoustic signaling, built-in | Internal battery | Dimensions | Net price | C.g. | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DG-12/MR |
|
MS-12/N | Semiconductor |
Methane (CH4) |
10/30 |
%LEL |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN849.00 | S |
| DG-14/MR |
|
MS-14/N | Semiconductor |
Methane (CH4) |
10/30 |
%LEL |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN849.00 | S |
| DG-15/MR |
|
MS-15/N | Semiconductor |
Liquefied petroleum gas (LPG) |
10/30 |
%LEL |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN849.00 | S |
| DG-22L/MR |
|
MS-22/NL | Semiconductor |
Carbon monoxide (CO) |
20/100 |
ppm |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN899.00 | N |
| DG-31/MR |
|
MS-31/N | Semiconductor |
Organic compounds |
20/40 |
%LEL |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN1,099.00 | N |
| DG-41/MR |
|
MS-41/N | Semiconductor |
Ammonia (NH3) |
500/1500 |
ppm |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN899.00 | N |
| DG-61/MR |
|
MS-61/N | Semiconductor |
Refrigerant R32 or Refrigerant R410A |
1000/2000 |
ppm |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN899.00 | N |
| DG-71/MR |
|
MS-71/N | Semiconductor |
Acetylene (C2H2) or Hydrogen (H2) |
10/30 |
%LEL |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN899.00 | N |
| DG-73/MR |
|
MS-73/N | Semiconductor |
Hydrogen (H2) |
10/30 |
%LEL |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN899.00 | S |
| DG-1KL/MR |
|
MS-1KL/N | Catalytic |
Methane (CH4) |
10/30 |
%LEL |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | — | PLN1,279.00 | N |
| DG-1KL4/MR |
|
MS-1KL4/N | Catalytic |
Methane (CH4) |
10/30 |
%LEL |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | — | PLN1,179.00 | N |
| DG-1KL5/MR |
|
MS-1KL5/N | Catalytic |
Liquefied petroleum gas (LPG) |
10/30 |
%LEL |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | — | PLN1,179.00 | N |
| DG-7KL3/MR |
|
MS-7KL3/N | Catalytic |
Hydrogen (H2) |
10/30 |
%LEL |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | — | PLN1,179.00 | N |
| DG-0E.CL2/MR |
|
MS-0E.CL2/N | Electrochemical |
Chlorine (Cl2) |
1/3 |
ppm |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | F | |
| DG-0E.CLO2/MR |
|
MS-0E.CLO2/N | Electrochemical |
Chlorine dioxide (ClO2) |
0,1/0,3 (TWA/STEL) |
ppm |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | F | |
| DG-0E.ETO/MR |
|
MS-0E.ETO/N | Electrochemical |
Ethylene oxide (C2H4O) |
2/5 |
ppm |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | F | |
| DG-0E.HCL/MR |
|
MS-0E.HCL/N | Electrochemical |
Hydrogen chloride (HCl) |
3,4/6,8 (TWA/STEL) |
ppm |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | F | |
| DG-0E.NO2/MR |
|
MS-0E.NO2/N | Electrochemical |
Nitrogen dioxide (NO2) |
1/3 |
ppm |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | F | |
| DG-0E.O3/MR |
|
MS-0E.O3/N | Electrochemical |
Ozone (O3) |
0,2/0,3 |
ppm |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | F | |
| DG-0E.SO2/MR |
|
MS-0E.SO2/N | Electrochemical |
Sulfur dioxide (SO2) |
0.5/1 (TWA/STEL) |
ppm |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | F | |
| DG-2E/MR |
|
MS-2E/N | Electrochemical |
Carbon monoxide (CO) |
20/100 |
ppm |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN1,279.00 | N |
| DG-4E/MR |
|
MS-4E/N | Electrochemical |
Ammonia (NH3) |
500/800 |
ppm |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN1,279.00 | N |
| DG-4E1/MR |
|
MS-4E/N1 | Electrochemical |
Ammonia (NH3) |
20/40 (TWA/STEL) |
ppm |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN1,279.00 | N |
| DG-4E2/MR |
|
MS-4E/N2 | Electrochemical |
Ammonia (NH3) |
20/40 (TWA/STEL) |
ppm |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN1,549.00 | N |
| DG-5E/MR |
|
MS-5E/N | Electrochemical |
Hydrogen sulfide (H2S) |
5/10 (TWA/STEL) |
ppm |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN1,279.00 | N |
| DG-7E/MR |
|
MS-7E/N | Electrochemical |
Hydrogen (H2) |
500/800 |
ppm |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN1,279.00 | N |
| DG-9E5/MR |
|
MS-9E5/N | Electrochemical |
Oxygen (O2) |
19/18 |
%v/v |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | — | PLN1,279.00 | N |
| DG-1R2/MR |
|
MS-1R2/N | Infra-red |
Methane (CH4) |
10/30 |
%LEL |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN2,079.00 | S |
| DG-1R5/MR |
|
MS-1R5/N | Infra-red |
Liquefied petroleum gas (LPG) |
10/30 |
%LEL |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN2,079.00 | S |
| DG-3R/MR |
|
MS-3R/N | Infra-red |
Organic compounds |
20/40 |
%LEL |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN2,279.00 | N |
| DG-6R7/MR |
|
MS-6R7/N | Infra-red |
Refrigerant R32 or Refrigerant R410A |
500/1500 |
ppm |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN3,329.00 | N |
| DG-6R7/MR-SF6 |
|
MS-6R7/N-SF6 | Infra-red |
Sulfur hexafluoride (SF6) |
500/1500 |
ppm |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN3,329.00 | N |
| DG-8R/MR |
|
MS-8R/N | Infra-red |
Carbon dioxide (CO2) |
0,5/1,5 |
%v/v |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN2,079.00 | N |
| DG-8R8/MR |
|
MS-8R8/N | Infra-red |
Carbon dioxide (CO2) |
0,5/1,5 |
%v/v |
24VDC | 2 | — | — | — | — | — | — | — | ✓ | ✓ | — | — | 110 x 140 x 55 mm | PLN1,489.00 | S |
Suggested products
Splash-proof enclosures AP-1
Splash-proof enclosures to protect detectors from adverse weather conditions and mechanical damage
Tubular shields AR-1
Profiled tube guards to protect the detector from direct mechanical damage
Gas test sets GTS
Test sets for verifying the correct operation of detectors by injecting a gaseous test mixture into the measuring chamber of the detector