Threshold gas detectors DEX/F

DEX/F detectors are designed to detect the presence of dangerous concentrations of gases or vapours of explosive or toxic liquids or oxygen. They signal exceeding two alarm thresholds (A1, A2) set in an interchangeable sensor module (thresholds set at the production stage). They are designed to work only with control modules type MD.

The detectors meet the essential requirements of Directive 2014/34/EU (ATEX) of the European Parliament and of the Council of 26 February 2014, on the harmonization of the laws of the Member States relating to protective systems intended for use in potentially explosive atmospheres, implemented by the Regulation of the Minister of Development on requirements for equipment and protective systems intended for use in potentially explosive atmospheres of 6 June 2016. (Journal of Laws 2016 item 817).

The detectors are devices with explosion-proof construction of flameproof cover type and can be used in zones 1 or 2 threatened with explosion of flammable gases or vapors classified as explosiveness group IIA, IIB or IIC, temperature classes T1, T2, T3, T4, T5 or T6.

Features

  • detachable and interchangeable sensor unit guarantees easy maintenance and low cost operation;
  • easy change of detection gas or calibration of detector;
  • built in temperature compensation;
  • semiconductor or catalytic or infra-red sensor for combustible gases or electrochemical sensor for toxic gases or oxygen;
  • high temperature (up to +80°C) version available;
  • all detectors are calibrated in our own GAZEX Calibration Laboratory operating in accordance with PN-EN ISO/IEC 17025 (PCA accreditation No AP150).

Typical system configuration

Offered models

Model Gas sensor module Sensor Substance/property Standard alarm thresholds or measuring range Supply voltage Net price C/G
Ex MS-12/N Semiconductor Methane (CH4)
10/30
%LEL
System powered PLN839.00 S
Ex MS-14/N Semiconductor Methane (CH4)
10/30
%LEL
System powered PLN839.00 S
Ex MS-14/N Semiconductor Methane (CH4)
10/30
%LEL
System powered PLN1,439.00 N
Ex MS-15/N Semiconductor Liquefied petroleum gas (LPG)
10/30
%LEL
System powered PLN839.00 S
Ex MS-22/NL Semiconductor Carbon monoxide (CO)
20/100
ppm
System powered PLN879.00 N
Ex MS-31/N-X Semiconductor Organic compounds
20/40
%LEL
System powered PLN979.00 N
Ex MS-41/N-X Semiconductor Ammonia (NH3)
500/1500
ppm
System powered PLN879.00 N
Ex MS-61/N-X Semiconductor Hydrofluorocarbons (HFC)
1000/2000
ppm
System powered PLN879.00 N
Ex MS-71/N Semiconductor Acetylene (C2H2)
or Hydrogen (H2)
10/30
%LEL
System powered PLN879.00 N
New product Ex MS-73/N-X Semiconductor Hydrogen (H2)
10/30
%LEL
System powered PLN879.00 S
Ex MS-1K5/N Catalytic Liquefied petroleum gas (LPG)
10/30
%LEL
System powered PLN1,129.00 S
Ex MS-1K/N Catalytic Methane (CH4)
10/30
%LEL
System powered PLN1,129.00 S
Ex MS-3K/N Catalytic Organic compounds
20/40
%LEL
System powered PLN1,229.00 N
Ex MS-4K/N Catalytic Ammonia (NH3)
5/15
%LEL
System powered PLN1,129.00 N
Ex MS-7K/N Catalytic Acetylene (C2H2)
or Hydrogen (H2)
20/40
%LEL
System powered PLN1,129.00 N
Ex MS-2E/N Electrochemical Carbon monoxide (CO)
20/100
ppm
System powered PLN1,179.00 N
Ex MS-4E/N-X Electrochemical Ammonia (NH3)
500/800
ppm
System powered PLN1,179.00 N
Ex MS-7E/N Electrochemical Hydrogen (H2)
500/800
ppm
System powered PLN1,179.00 N
Ex MS-9E/N Electrochemical Oxygen (O2)
19/18
%v/v
System powered PLN1,179.00 N
Ex MS-1R2/N Infra-red Methane (CH4)
10/30
%LEL
System powered PLN1,899.00 S
Ex MS-1R5/N Infra-red Liquefied petroleum gas (LPG)
10/30
%LEL
System powered PLN1,899.00 S
Ex MS-3R/N-X Infra-red Organic compounds
20/40
%LEL
System powered PLN1,999.00 N
Ex MS-8R/N Infra-red Carbon dioxide (CO2)
0,5/1,5
%v/v
System powered PLN1,899.00 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

AP-1
Splash-proof enclosures AP-1
Splash-proof enclosures to protect detectors from adverse weather conditions and mechanical damage
AR-1
Tubular shields AR-1
Profiled tube guards to protect the detector from direct mechanical damage
DEX-G New product
DEX-G Ex
DEX/F, DEX/A or DEX/P detector adaptation for operation in dust explosive areas
GTS
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