______________________________________________________________________________________
Whilst SGX has taken care to ensure the accuracy of the information contained herein it accepts no responsibility for the consequences of any use thereof and also reserves the right to
change the specification of goods without notice. SGX accepts no liability beyond the set out in its standard conditions of s
ale in respect of infringement of third party patents arising from
the use of SGX products in accordance with inf
ormation contained herein.
In case of modification of the product, SGX d
isclaims all liability.
SGX Europe sp .z o.o. Poland REGON: 362332227 DS-0141, Issue 3, 29-Jul-2016, Page 1
SGX Europe Sp. z o.o.
Building 11
Ligocka St. 103,
40-568 Katowice,
Poland
T: +48 (0) 32 438 4778
E: sales.is@sgxsensortech.com
www.sgxsensortech.com
SGX-4DT
Industrial Dual Toxic Sensor (CO and H
2
S)
(Application : Portable Multi-Gas Detectors)
PERFORMANCE
Range
0 – 500 ppm CO
0 – 200 ppm H
2
S
Output Signal
80 ± 30 nA/ppm CO
775 ± 275 nA/ppm H
2
S
Typical Baseline Range
(pure air)
±2 ppm CO equivalent
±0.5 ppm H
2
S equivalent
Filter Capacity
> 20000 ppm hours CO
Linearity
Linear
Response time (T
90
)
<30 s
Maximum Overload
2000 ppm CO
500 ppm H
2
S
Long-Term Output Drift
<10% per annum
Recommended Load
Resistor
10 ohms (CO)
10 ohms (H
2
S)
Repeatability
<±3% CO equivalent
<±2% H
2
S equivalent
Resolution
±1 ppm CO typical
±0.5 ppm H
2
S typical
Warranty
2 years
Bias
No Bias
OPERATING CONDITIONS
Temperature Range
-30°C to +50°C
Operating Humidity
15 – 90% RH
(non-Condensing)
Pressure range
800 to 1200 mbar
Operating Circuit
See Application Note 2
Recommended Storage
Temperature
0°C to 20°C
Storage Life
6 months in original
Packaging (0 to 20°C)
Expected Operating Life
> 24 months in air
INTRINSIC SAFETY DATA
Maximum at 2000 ppm
0.3 mA
Maximum o/c Voltage
1.3 V
Maximum s/c Current
<1.0 A
PRODUCT DIMENSIONS
All dimensions in mm
All tolerances ±0.15 mm
IMPORTANT NOTES
• All performance is based on conditions at 20°C,
50% RH and 1 atm, using SGX recommended
circuitry.
• Sensor performance is temperature dependant;
please contact SGX for temperature performance
other than 20°C.
• Do not solder to the connector pins as this may
damage the sensor and thereby invalidate the
warranty.
• Details on recommended connector pins can be
found in the Frequently Asked Questions within
the Gas Sensor section of the SGX website.
• This device is designed to be RoHS compliant.
______________________________________________________________________________________
© SGX Sensortech 2016 Document subject to disclaimer on page 1 DS-0141, Issue 3, 29-July-2016, Page 2
SGX Europe Sp. z o.o.
Building 11
Ligocka St. 103,
40-568 Katowice,
Poland
T: +48 (0) 32 438 4778
E: sales.is@sgxsensortech.com
www.sgxsensortech.com
CROSS-SENSITIVITY DATA
GAS CONCENTRATION CO H
2
S
Hydrogen Sulfide 25 ppm < 5 ppm 25 ppm
Sulfur Dioxide 5 ppm 0 ppm < 1 ppm
Hydrogen 100 ppm < 30 ppm < 0.05 ppm
Nitric Oxide
35 ppm
< 0.1 ppm
< 1 ppm
Carbon Monoxide 300 ppm 300 ppm < 5 ppm
Nitrogen Dioxide 5 ppm < 0.1 ppm 0 ppm
Chlorine 15 ppm 0 ppm 0 ppm
Note: This table is for reference only and are typical values. Cross Sensitivities may not be linear and should not be scaled. Calibration should be carried out
with the actual gas at a known concentration.
TEMPERATURE
POISONING
SGX sensors are designed to operate in a wide range of harsh environments and conditions. However it is important
that exposure to high concentrations of solvent vapours is avoided, both during storage, fitting into instrument and
operation. When using sensors on printed circuit boards (PCBs), degreasing agents should be used prior to the sensor
being fitted.
