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Standard 'Ex' Certified Sensors  

Features 
Single-gas types for Hydrocarbon gases, Carbon Dioxide or Nitrous Oxide. 
Sensors may be calibrated to customer specification. 
Operating voltage 3 to 5 volts dc, nominal current = 60mA. 
Provides 'raw' signal output for processing external to the sensor. 
OEM board available containing the necessary processing electronics and LCD display 
Fast response. 
Internal temperature signal output. 
Temperature compensated detector elements. 
Wide operating temperature range of -20 to +50 deg. C. 
Industry standard size - 20mm diameter x 16.6mm high (excluding pins). 
Optional replaceable, self-adhesive micro porous 1 micron filter. 
OEM Circuit Board and Development Kit available - see below. 
Note - Infrared sensors cannot be used to detect Hydrogen gas. 
 
Standard series infrared gas sensors provide a 'raw' signal output which needs to be be fed into external processing electronics and software. This may either be provided by the equipment manufacturer or by use of a purpose-designed OEM board available from Dynament Ltd. 
 
They are contained in an Ex d stainless steel housing and are hazardous area certified to IECEx, ATEX and UL standards. The IECEx and ATEX certification also includes Group I (mining) certification. Certification Details. 
 
The sensors can be used to measure Hydrocarbon gases, Carbon Dioxide or Nitrous Oxide, depending upon the sensor type, within a wide range of commercial and industrial applications. 
 
The standard measurement ranges are as follows:- 
 
Hydrocarbon - LEL & 0-100% Volume. 
Carbon Dioxide - 0-500ppm up to 0-5% Volume & 0-100% Volume. 
Nitrous Oxide - 0-1000ppm up to 0-1% Volume. 
 
Although the 0-100% Volume Hydrocarbon type will also measure LEL values it will not provide the necessary resolution for explosion protection applications. The standard calibration gas for Hydrocarbon is Methane (CH4) unless otherwise requested
 
If you require advice or have a requirement for a particular measurement range not shown below then please contact us and we will be please to assist you with your application. 
 

Hydrocarbon Types 

The Hydrocarbon sensor order codes commence with MSH-HC (for 0-100% LEL Hydrocarbons) or MSH-HHC (for 0-100% Volume Hydrocarbons) followed other options such as a filter (see below) and/or an electrically isolated case (suffix I). 
 
There are two filter options available for this sensor:- 
 
F - Self adhesive 14 micron PTFE filter for water ingress protection. 
P - Removeable 45 micron plastic dust filter insert - P. 
 
The table below gives details of the order codes of sensors for measurement of 0-100% LEL (Lower Explosive Limit) of the target gas. 
ORDER CODE 
DESCRIPTION 
MSH-HC 
Standard 0-100% LEL Hydrocarbon Sensor, Certified 
MSH-HC/I 
Standard 0-100% LEL Hydrocarbon Sensor, Certified 
With an Electrically Isolated Case 
MSH-HC/F 
Standard 0-100% LEL Hydrocarbon Sensor, Certified 
With a 14 Micron PTFE Filter 
MSH-HC/I/F 
Standard 0-100% LEL Hydrocarbon Sensor, Certified 
With an Electrically Isolated Case and 14 Micron PTFE Filter 
MSH-HC/P 
Standard 0-100% LEL Hydrocarbon Sensor, Certified 
With a 45 Micron Plastic Dust Filter 
MSH-HC/I/P 
Standard 0-100% LEL Hydrocarbon Sensor, Certified 
With an Electrically Isolated Case and 45 Micron Plastic Dust Filter 
The table below gives details of the order codes of sensors for measurement of 0-100% Volume concentration of the target gas. 
ORDER CODE 
DESCRIPTION 
MSH-HHC 
Standard 0-100% Volume Hydrocarbon Sensor, Certified 
MSH-HHC/I 
Standard 0-100% Volume Hydrocarbon Sensor, Certified 
With an Electrically Isolated Case 
MSH-HHC/F 
Standard 0-100% Volume Hydrocarbon Sensor, Certified 
With a 14 Micron PTFE Filter 
MSH-HHC/I/F 
Standard 0-100% Volume Hydrocarbon Sensor, Certified 
With an Electrically Isolated Case and 14 Micron PTFE Filter 
MSH-HHC/P 
Standard 0-100% Volume Hydrocarbon Sensor, Certified 
With a 45 Micron Plastic Dust Filter 
MSH-HHC/I/P 
Standard 0-100% Volume Hydrocarbon Sensor, Certified 
With an Electrically Isolated Case and a 45 Micron Plastic Dust Filter 

Carbon Dioxide Types 

The sensors are within the Carbon Dioxide series which commence with the MSH-CO2 (for sensors up to 5% volume) or MSH-HCO2 (for sensors up to 100% volume) followed by other options such as a filter (see below) and/or an electrically isolated case (suffix I). 
 
There are two filter options available for this sensor:- 
 
F - Self adhesive 14 micron PTFE filter for water ingress protection. 
P - Removeable 45 micron plastic dust filter insert - P. 
 
The table below gives details of the order codes of sensors for measurement of the range 0-5% Volume
ORDER CODE 
DESCRIPTION 
MSH-CO2 
Standard 0 - 5% Vol. Carbon Dioxide Sensor, Certified 
MSH-CO2/I 
Standard 0 - 5% Vol. Carbon Dioxide Sensor, Certified 
With an Electrically Isolated Case 
MSH-CO2/F 
Standard 0 - 5% Vol. Carbon Dioxide Sensor, Certified 
With a 14 Micron PTFE Filter 
MSH-CO2/I/F 
Standard 0 - 5% Vol. Carbon Dioxide Sensor, Certified 
With an Electrically Isolated Case and 14 Micron PTFE Filter 
MSH-CO2/P 
Standard 0 - 5% Vol. Carbon Dioxide Sensor, Certified 
With a 45 Micron Plastic Dust Filter 
MSH-CO2/I/P 
Standard 0 - 5% Vol. Carbon Dioxide Sensor, Certified 
With an Electrically Isolated Case and a 45 Micron Plastic Dust Filter 
The table below gives details of the order codes of sensors for measurement of the range 0-100% Volume. 
ORDER CODE 
DESCRIPTION 
MSH-HCO2 
Standard 0 - 100% Vol. Carbon Dioxide Sensor, Certified 
MSH-HCO2/I 
Standard 0 - 100% Vol. Carbon Dioxide Sensor, Certified 
With an Electrically Isolated Case 
MSH-HCO2/F 
Standard 0 - 100% Vol. Carbon Dioxide Sensor, Certified 
With a 14 Micron PTFE Filter 
MSH-HCO2/I/F 
Standard 0 - 100% Vol. Carbon Dioxide Sensor, Certified 
With an Electrically Isolated Case and 14 Micron PTFE Filter 
MSH-HCO2/P 
Standard 0 - 100% Vol. Carbon Dioxide Sensor, Certified 
With a 45 Micron Plastic Dust Filter 
MSH-HCO2/I/P 
Standard 0 - 100% Vol. Carbon Dioxide Sensor, Certified 
With an Electrically Isolated Case and a 45 Micron Plastic Dust Filter 

Nitrous Oxide Types 

The sensor order codes commence with the code MSH-N2O followed other options such as a filter (see below) and/or an electrically isolated case (suffix I). 
 
There are two filter options available for this sensor:- 
 
F - Self adhesive 14 micron PTFE filter for water ingress protection. 
P - Removeable 45 micron plastic dust filter insert - P. 
 
The table below gives the order codes and description of typical sensor types that are available over the range 0-1% volume
ORDER CODE 
DESCRIPTION 
MSH-N2O + measurement range 
Standard Nitrous Oxide Sensor, Certified 
MSH-N2O/I + measurement range 
Standard Nitrous Oxide Sensor, Certified 
With an Electrically Isolated Case 
MSH-N2O/F + measurement range 
Standard Nitrous Oxide Sensor, Certified 
With a 14 Micron PTFE Filter 
MSH-N2O/I/F + measurement range 
Standard Nitrous Oxide Sensor, Certified 
With an Electrically Isolated Case and 14 Micron PTFE Filter 
MSH-N2O/P + measurement range 
Standard Nitrous Oxide Sensor Certified 
With a 45 Micron Plastic Dust Filter 
MSH-N2O/I/P + measurement range 
Standard Nitrous Oxide Sensor Certified 
With an Electrically Isolated Case and 45 Micron Plastic Dust Filter