Midas Cartridge Detectable Gases
Gas Name Chemical bbbbula Range Sensor Part Number
Ammonia NH3 9-100 ppm MIDAS-E-NH3
Arsine AsH3 18-200 ppb MIDAS-E-ASH
Boron Trichloride BCl3 0.72-8 ppm MIDAS-E-HCL
Boron Trifluoride BF3 0.72-8 ppm MIDAS-E-HFX
Boron Trifluoride (Low Level) BF3 0.18-2 ppm MIDAS-E-HFL
Bromine Br2 0.036-0.4 ppm MIDAS-E-BR2
Carbon Dioxide CO2 0.15-2.0% MIDAS-E-CO2
Carbon Monoxide CO 9-100 ppm MIDAS-E-COX
Chlorine Cl2 0.18-2 ppm MIDAS-E-HAL
Chlorine Dioxide ClO2 0.036-0.4 ppm MIDAS-E-BR2
Diborane B2
H6 36-400 ppb MIDAS-E-B2H
Dichlorosilane H2
Cl2
Si 0.72-8 ppm MIDAS-E-HCL
Difluoromethane** CH2
F2 16-240 ppm MIDAS-E-XCF
Disilane Si2
H6 1.8-20 ppm MIDAS-E-SHX
Fluorine F2 0.36-4 ppm MIDAS-E-HAL
Germane GeH4 70-800 ppb MIDAS-E-ASH
Hexafluorobutadiene** C4
F6 3-40 ppm MIDAS-E-CFX
Hydrogen (%LEL) H2 6.5-100% LEL MIDAS-E-LEL*
Hydrogen (ppm) H2 90-1000 ppm MIDAS-E-H2X
Hydrogen Bromide HBr 0.72-8 ppm MIDAS-E-HCL
Hydrogen Chloride HCl 0.72-8 ppm MIDAS-E-HCL
Hydrogen Cyanide HCN 1.8-20 ppm MIDAS-E-HCN
Hydrogen Fluoride HF 1.05-12 ppm MIDAS-E-HFX
Hydrogen Fluoride (Low Level) HFL 0.18-2 ppm MIDAS-E-HFL
Hydrogen Sulfide H2
S 3.6-40 ppm MIDAS-E-H2S
Methane (%LEL) CH4 6.5-100% LEL MIDAS-E-LEL*
Methyl Fluoride** CH3
F 8-120 ppm MIDAS-E-XHF
Nitric Oxide NO 9-100 ppm MIDAS-E-NOX
Nitrogen Dioxide NO2 1.05-12 ppm MIDAS-E-NO2
Nitrogen Trifluoride** NF3 3.6-40 ppm MIDAS-E-HFX for 00P, XHF for NP1
Octofluorocyclopentene** C5
F8 3-40 ppm MIDAS-E-XCF
Oxygen O2 0.2-25% v/v MIDAS-E-O2X
Ozone O3 0.065-0.7 ppm MIDAS-E-O3H
Ozone (Low Level) O3 0.036-0.4 ppm MIDAS-E-O3X
Phosphine PH3 110-1200 ppb MIDAS-E-PH3
Silane SiH4 1.8-20 ppm MIDAS-E-SHX
Silane (Low Level) SiH4 0.18-2 ppm MIDAS-E-SHL
Sulfur Dioxide SO2 0.7-8 ppm MIDAS-E-SO2
Tetra Ethyl Ortho Silicate TEOS 3.6-40 ppm MIDAS-E-TEO
Tungsten Hexafluoride WF6 1.05-12 ppm MIDAS-E-HFX
Tungsten Hexafluoride (Low Level) WF6 0.18-2 ppm MIDAS-E-HFL

Midas H2氫氣氣體探測傳感器MIDAS-S-H2X MIDAS-E-H2X

Hydrogen ppm (H2)
MIDAS-S-H2X
MIDAS-E-H2X
Midas? sensor cartridges are intended
for use only with Honeywell Analytics’
Midas? Gas Detector System. Please
refer to the Midas? Technical Manual
for further details.
Technical Data
Gas Measured Hydrogen (H2)
Cartridge Part Number MIDAS-S-H2X 1 year standard warranty
MIDAS-E-H2X 2 year extended warranty
Sensor Technology 3 electrode electrochemical cell
Measuring range (ppm) H2 0 – 1000 ppm
Minimum Alarm 1 Set Point 120 ppm
Lower Detectable Limit (LDL) 90 ppm
Repeatability < ? 5 % of measured value
Linearity < ? 5 % of measured value
Response Time t62.5 < 50 seconds
Sensor Cartridge Life Expectancy ≥ 24 months under typical application conditions
Operating Temperature 0? to 40?C (32? to 104?F)
Effect of Temperature < ? 0.17 ppm / ?C (0? to 20?C )
Zero < ? 0.07 ppm / ?C (20? to 40?C )
Sensitivity < ? 3 % of measured value / ?C
Operating Humidity (continuous) 10 – 90 % rH
Effect of Humidity
Zero No Effect
Sensitivity No Effect
Operating Pressure 90 – 110 kPa
Effect of bbbbbbbb No effect in typical application
Long Term Drift
Zero No Drift
Sensitivity < ? 10 % of measured value / 6 month
Calibration Gas Hydrogen (H2)
Challenge Gas (Bump Test) Hydrogen (H2)
Warm Up time < 10 minutes
Storage Temperature 5? to 25?C ( 41? to 77?F)
The sensor data listed is based on ideal test environment; observed perbbbbance may vary based on the actual monitoring system and the sampling conditions employed
Gas / Vapor Chemical bbbbula Concentration applied (ppm) Reading (ppm H2)
Ammonia NH3 100 0
Arsine AsH3 0.2 0
Carbon Dioxide CO2 1000 0
Carbon Monoxide CO 100 150
Chlorine Cl2 1 0
Chlorine Dioxide ClO2 1 0
Hydrogen Cyanide HCN 20 0
Hydrogen Sulfide H2S 20 4
Iso Propanol C3H7OH 1100 Yes
Methane CH4 1% 0
Nitrogen Dioxide NO2 10 -40
Ozone O3 0.25 0
Sulfur Dioxide SO2 5 0
MDA Scientific has developed a sophisticated range of highly sensitive gas detection equipment, designed to perbbbb in ways that define new gas detection perbbbbance levels providing total solutions to protect people, improve production efficiency and reduce costs.

Midas? is a registered trademark of Honeywell Analytics.
As with all electrochemical sensor cells, dramatic output changes in reported concentrations can be
expected under rapidly changing environmental conditions. Please ensure sensors are located in areas not
prone to sudden changes in humidity and temperature.
Actual readings may be affected by flow rates (although Midas? automatically controls flow rate within
specified ranges) and absorption on tubing and other gas path surfaces.
All sensors are shipped pre-calibrated to traceable national standards. Dependent on actual operating
conditions and overall exposure to gases, each sensor may not require in field calibration for up to 24
months subject to any requirements to calibrate from local regulations or site practices.
Calibration and challenge gases should be from a certified and reliable source.
Cross Sensitivities
Each Midas? sensor is potentially cross sensitive to other gases and this may cause a gas reading when
exposed to other gases than those originally designated. The table below presents typical readings that
will be observed when a new sensor cartridge is exposed to the cross sensitive gas (or a mixture of gases
containing the cross sensitive species).