Threshold gas detectors DEX/A

DEX/A 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 have a 3-wire interface type 4-20mA (passive).

They are designed to cooperate with measuring control units of MDP family (and with selected models of MD-1, MDD-1/T and MDD-1x/T). After applying power limiter type MDPL1 (optional), they can also cooperate with other any control panels accepting standard 4-20mA input lines (with current emission).

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.

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 829.00 zł N
Ex MS-14/N Semiconductor Methane (CH4)
10/30
%LEL
System powered 829.00 zł N
Ex MS-15/N Semiconductor Liquefied petroleum gas (LPG)
10/30
%LEL
System powered 829.00 zł N
Ex MS-31/N-X Semiconductor Volatile organic compounds (VOC)
20/40
%LEL
System powered N
Ex MS-71/N Semiconductor Acetylene (C2H2)
or Hydrogen (H2)
10/30
%LEL
System powered N
Ex MS-72/N-X Semiconductor Hydrogen (H2)
20/40
%LEL
System powered 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 to protect detectors from adverse weather conditions and mechanical damage
AR-1
Profiled tube guards to protect the detector from direct mechanical damage
GTS
Test kits for checking the correct functioning of detectors