DG/MR

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.pl/oprogramowanie/;
  • 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

Name Sensor Substance/property Standard alarm thresholds or measuring range Supply voltage Net price C/G
RS485 Semiconductor Methane (CH4)
10/30
%LEL
24VDC 709.00 zł S
RS485 Semiconductor Methane (CH4)
10/30
%LEL
24VDC 709.00 zł S
RS485 Semiconductor Liquefied petroleum gas (LPG)
10/30
%LEL
24VDC 709.00 zł S
RS485 Semiconductor Carbon monoxide (CO)
20/100
ppm
24VDC 709.00 zł N
RS485 Semiconductor Organic compounds
20/40
%LEL
24VDC 789.00 zł N
RS485 Semiconductor Ammonia (NH3)
500/1500
ppm
24VDC 749.00 zł N
RS485 Semiconductor Hydrofluorocarbons (HFC)
1000/2000
ppm
24VDC 749.00 zł N
RS485 Semiconductor Acetylene (C2H2)
or Hydrogen (H2)
10/30
%LEL
24VDC 749.00 zł N
RS485 Semiconductor Hydrogen (H2)
20/40
%LEL
24VDC 709.00 zł S
RS485 Semiconductor Temperature (T)

°C
24VDC 519.00 zł N
RS485 Electrochemical Arsine (AsH3)
0,2/0,4
ppm
24VDC N
RS485 Electrochemical Diborane (B2H6)
0,2/0,4
ppm
24VDC N
RS485 Electrochemical Chlorine (Cl2)
1/3
ppm
24VDC N
RS485 Electrochemical Chlorine dioxide (ClO2)
0,1/0,3 (TWA/STEL)
ppm
24VDC N
RS485 Electrochemical Phosgene (COCl2)
0,2/0,4
ppm
24VDC N
RS485 Electrochemical Ethylene oxide (C2H4O)
2/5
ppm
24VDC N
RS485 Electrochemical Hydrogen chloride (HCl)
3,4/6,8 (TWA/STEL)
ppm
24VDC N
RS485 Electrochemical Hydrogen cyanide (HCN)
3/6
ppm
24VDC N
RS485 Electrochemical Nitrogen dioxide (NO2)
1/3
ppm
24VDC N
RS485 Electrochemical Nitrogen monoxide (NO)
2/– (TWA/STEL)
ppm
24VDC N
RS485 Electrochemical Ozone (O3)
0,2/0,3
ppm
24VDC N
RS485 Electrochemical Hydrogen phosphide (PH3)
0,1/0,2 (TWA/STEL)
ppm
24VDC N
RS485 Electrochemical Hydrogen selenide (H2Se)
1/3
ppm
24VDC N
RS485 Electrochemical Silane (SiH4)
5/10
ppm
24VDC N
RS485 Electrochemical Sulfur dioxide (SO2)
0.5/1 (TWA/STEL)
ppm
24VDC N
RS485 Electrochemical Carbon monoxide (CO)
20/100
ppm
24VDC 949.00 zł N
RS485 Electrochemical Ammonia (NH3)
20/40 (TWA/STEL)
ppm
24VDC 1,049.00 zł N
RS485 Electrochemical Ammonia (NH3)
20/40 (TWA/STEL)
ppm
24VDC 1,249.00 zł N
RS485 Electrochemical Ammonia (NH3)
500/800
ppm
24VDC 1,049.00 zł N
RS485 Electrochemical Hydrogen sulfide (H2S)
5/10 (TWA/STEL)
ppm
24VDC 949.00 zł N
RS485 Electrochemical Hydrogen (H2)
500/800
ppm
24VDC 1,049.00 zł N
RS485 Electrochemical Oxygen (O2)
19/18
%v/v
24VDC 899.00 zł S
RS485 Infra-red Methane (CH4)
10/30
%LEL
24VDC 1,649.00 zł S
RS485 Infra-red Liquefied petroleum gas (LPG)
10/30
%LEL
24VDC 1,649.00 zł S
RS485 Infra-red Organic compounds
20/40
%LEL
24VDC 1,789.00 zł N
RS485 Infra-red Hydrofluorocarbons (HFC)
500/1500
ppm
24VDC 2,929.00 zł N
RS485 Infra-red Sulfur hexafluoride (SF6)
500/1500
ppm
24VDC 2,929.00 zł N
RS485 Infra-red Carbon dioxide (CO2)
0,5/1,5
%v/v
24VDC 1,149.00 zł S
RS485 Infra-red Carbon dioxide (CO2)
0,5/1,5
%v/v
24VDC 1,649.00 zł N

Detection of substance/property in other areas or other substances/properties is possible = special execution, requires consultation.
In special cases, it is possible to select the detector parameters for a specific application = required analysis of the conditions of use.

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 kits GTS
Test kits for checking the correct functioning of detectors