Midas Cartridge Detectable Gases
Gas Name Chemical Formula 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 performance may vary based on the actual monitoring system and the
sampling conditions employed
Gas / Vapor Chemical Formula
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 perform in ways
that define new gas detection performance 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).
