Air Quality Sensors – Mouser Singapore

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SGX-4x Electrochemical Sensors

Amphenol SGX Sensortech SGX-4x Electrochemical Sensors are available in a broad range of sensing types for industrial and commercial gas applications. These air quality sensors allow instrument manufacturers a greater choice when selecting sensors for carbon monoxide (CO), hydrogen sulfide (H₂S), oxygen (O₂), ammonia (NH₃), chlorine (Cl₂), multi-gas nitric oxide (NO), nitrogen dioxide (NO₂), and sulfur dioxide (SO₂). These sensors have a minimum operating temperature of -40°C, -30°C, or -20°C, and a maximum operating temperature of +50°C or +60°C. Amphenol SGX Sensortech SGX-4x Electrochemical Sensors are available in 20mm industrial standard packages and act as drop-in replacements for existing sensor types in this size.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (SGD) Filter the results in the table by unit price based on your quantity.	Qty.	RoHS	Type	Sensor Type	Measuring Range - Min	Measuring Range - Max	Output Type	Supply Voltage - Min	Supply Voltage - Max	Minimum Operating Temperature	Maximum Operating Temperature	Mounting Style	Series
Air Quality Sensors 4 Series Electrochemical Ozone sensor 5ppm SGX-4O3-5 Amphenol SGX Sensortech 1: $153.16 2In Stock New Product	Mfr. Part No. SGX-4O3-5 Mouser Part No 523-SGX-4O3-5 New Product	Amphenol SGX Sensortech	Air Quality Sensors 4 Series Electrochemical Ozone sensor 5ppm Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	2In Stock	$153.16 $124.45 $119.23 $114.28 View $113.00 $110.64 Quote	Min.: 1 Mult.: 1		Electrochemical 4-series	Ozone	0 PPM	5 PPM	Analog			- 20 C	+ 50 C		Electro-Chemical
Air Quality Sensors 4 Series SO2 Gas Sensor - 20ppm SGX-4SO2 Amphenol SGX Sensortech 1: $126.18 29In Stock	Mfr. Part No. SGX-4SO2 Mouser Part No 523-SGX-4SO2	Amphenol SGX Sensortech	Air Quality Sensors 4 Series SO2 Gas Sensor - 20ppm Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	29In Stock	$126.18 $117.06 $113.66 $109.59 $106.80	Min.: 1 Mult.: 1		Electrochemical 4-series	Sulfur Dioxide	0 PPM	20 PPM	Analog			- 30 C	+ 50 C	Through Hole	Electro-Chemical
Air Quality Sensors 4 Series Nitrogen Dioxide Sensor-30ppm SGX-4NO2 Amphenol SGX Sensortech 1: $64.06 27In Stock	Mfr. Part No. SGX-4NO2 Mouser Part No 523-SGX-4NO2	Amphenol SGX Sensortech	Air Quality Sensors 4 Series Nitrogen Dioxide Sensor-30ppm Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	27In Stock	$64.06 $59.00 $57.11 $54.85 View $53.30 $49.91	Min.: 1 Mult.: 1		Electrochemical 4-series	Nitrogen Dioxide	0 PPM	30 PPM	Analog		1.3 V	- 30 C	+ 50 C	Through Hole	Electro-Chemical
Air Quality Sensors 4 Series ETO Gas Sensor 20ppm SGX-4ETO Amphenol SGX Sensortech 1: $159.31 14In Stock	Mfr. Part No. SGX-4ETO Mouser Part No 523-SGX-4ETO	Amphenol SGX Sensortech	Air Quality Sensors 4 Series ETO Gas Sensor 20ppm Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	14In Stock	$159.31 $136.56 $125.41 $117.91 View $117.10 $111.53	Min.: 1 Mult.: 1		Electrochemical 4-series	Ethylene Oxide	0 PPM	20 PPM	Analog			- 20 C	+ 50 C	Through Hole	Electro-Chemical
Air Quality Sensors 4 Series CO Sensor - 1,000ppm SGX-4CO-LC Amphenol SGX Sensortech 1: $64.93 8In Stock	Mfr. Part No. SGX-4CO-LC Mouser Part No 523-SGX-4CO-LC	Amphenol SGX Sensortech	Air Quality Sensors 4 Series CO Sensor - 1,000ppm Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	8In Stock	$64.93 $54.74 $40.27 $38.91 View Quote	Min.: 1 Mult.: 1		Electrochemical 4-series	Carbon Monoxide	0 PPM	1000 PPM	Analog			- 30 C	+ 50 C	Through Hole	Electro-Chemical
Air Quality Sensors MEMS Pellistor Gas Sensor, 0-5% volume Flammable Gases, Hazardous Area safe (ATEX certified), Flameproof enclosure Sensing(EX-da certified), with pins MP7227-R Amphenol SGX Sensortech 1: $80.23 17In Stock	Mfr. Part No. MP7227-R Mouser Part No 523-MP7227-R	Amphenol SGX Sensortech	Air Quality Sensors MEMS Pellistor Gas Sensor, 0-5% volume Flammable Gases, Hazardous Area safe (ATEX certified), Flameproof enclosure Sensing(EX-da certified), with pins Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	17In Stock	$80.23 $71.69 $66.40 $66.38 View $65.82 $64.34 Quote	Min.: 1 Mult.: 1		MEMS Pellistor	Flammable	0 %	5 %	Analog	1.6 V	3.2 V	- 20 C	+ 60 C	PCB Mount	MPEL
Air Quality Sensors 4 Series High Conc CO Sensor - 10000ppm SGX-4CO-10K Amphenol SGX Sensortech 1: $125.19 6In Stock	Mfr. Part No. SGX-4CO-10K Mouser Part No 523-SGX-4CO-10K	Amphenol SGX Sensortech	Air Quality Sensors 4 Series High Conc CO Sensor - 10000ppm Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	6In Stock	$125.19 $105.60 $92.11 $83.67 View $82.66 $78.65 Quote	Min.: 1 Mult.: 1		Electrochemical 4-series	Carbon Monoxide	0 PPM	10000 PPM	Analog			- 30 C	+ 50 C	Through Hole	Electro-Chemical
Air Quality Sensors 4 Series Ammonia Sensor - 300ppm SGX-4NH3-300 Amphenol SGX Sensortech 1: $185.60 1In Stock	Mfr. Part No. SGX-4NH3-300 Mouser Part No 523-SGX-4NH3-300	Amphenol SGX Sensortech	Air Quality Sensors 4 Series Ammonia Sensor - 300ppm Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	1In Stock	$185.60 $150.93 $117.91 $113.34	Min.: 1 Mult.: 1		Electrochemical 4-series	Ammonia	0 PPM	300 PPM	Analog			- 40 C	+ 50 C	Through Hole	Electro-Chemical
Air Quality Sensors 4 Series NO2 Sensor 2 Electrode - 20ppm SGX-4NO2-2E Amphenol SGX Sensortech 1: $93.76 6In Stock	Mfr. Part No. SGX-4NO2-2E Mouser Part No 523-SGX-4NO2-2E	Amphenol SGX Sensortech	Air Quality Sensors 4 Series NO2 Sensor 2 Electrode - 20ppm Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	6In Stock	$93.76 $91.62 $66.59 $61.81 View $60.02 $56.88 Quote	Min.: 1 Mult.: 1		Electrochemical 4-series	Nitrogen Dioxide	0 PPM	20 PPM	Analog			- 30 C	+ 50 C	Through Hole	Electro-Chemical
Air Quality Sensors 4 Series Electrochemical Fluorine 5ppm SGX-F2-5 Amphenol SGX Sensortech 1: $371.52 9In Stock	Mfr. Part No. SGX-F2-5 Mouser Part No 523-SGX-F2-5	Amphenol SGX Sensortech	Air Quality Sensors 4 Series Electrochemical Fluorine 5ppm Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	9In Stock	$371.52 $352.48	Min.: 1 Mult.: 1		Electrochemical 4-series	Fluorine	0 PPM	5 PPM	Analog			- 20 C	+ 40 C	Through Hole	Electro-Chemical
Air Quality Sensors 4 Series Electrochemical Hydrogen Fluoride 10ppm SGX-HF-10 Amphenol SGX Sensortech 1: $250.54 6In Stock	Mfr. Part No. SGX-HF-10 Mouser Part No 523-SGX-HF-10	Amphenol SGX Sensortech	Air Quality Sensors 4 Series Electrochemical Hydrogen Fluoride 10ppm Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	6In Stock	$250.54 $205.67 $199.24 $194.86 View Quote	Min.: 1 Mult.: 1		Electrochemical 4-series	Hydrogen Fluoride	0 PPM	10 PPM	Analog			- 20 C	+ 55 C	Through Hole	Electro-Chemical
Air Quality Sensors 4 Series Electrochemical Bromine 5ppm SGX-BR2-5 Amphenol SGX Sensortech 1: $357.23 23In Stock	Mfr. Part No. SGX-BR2-5 Mouser Part No 523-SGX-BR2-5	Amphenol SGX Sensortech	Air Quality Sensors 4 Series Electrochemical Bromine 5ppm Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	23In Stock	$357.23	Min.: 1 Mult.: 1		Gas Sensor	Multi-Gas						- 20 C	+ 40 C	Through Hole	Electro-Chemical
Air Quality Sensors 4 Series Ammonia Sensor - 1000ppm SGX-4NH3-1000 Amphenol SGX Sensortech 1: $133.04 33In Stock	Mfr. Part No. SGX-4NH3-1000 Mouser Part No 523-SGX-4NH3-1000	Amphenol SGX Sensortech	Air Quality Sensors 4 Series Ammonia Sensor - 1000ppm Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	33In Stock	$133.04 $123.49 $112.74 $101.17 View Quote	Min.: 1 Mult.: 1		Electrochemical 4-series	Ammonia	0 PPM	1000 PPM	Analog			- 40 C	+ 50 C	Through Hole	Electro-Chemical
Air Quality Sensors 4 Series CL2 Gas Sensor - 10ppm SGX-4CL2 Amphenol SGX Sensortech 1: $170.56 5In Stock	Mfr. Part No. SGX-4CL2 Mouser Part No 523-SGX-4CL2	Amphenol SGX Sensortech	Air Quality Sensors 4 Series CL2 Gas Sensor - 10ppm Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	5In Stock	$170.56 $156.55 $117.91 $117.64 $113.34	Min.: 1 Mult.: 1		Electrochemical 4-series	Chlorine	0 PPM	10 PPM	Analog			- 20 C	+ 50 C	Through Hole	Electro-Chemical
Air Quality Sensors 4 Series Dual-Tox Sensor-500ppm/200ppm SGX-4DT Amphenol SGX Sensortech 1: $109.43 1In Stock	Mfr. Part No. SGX-4DT Mouser Part No 523-SGX-4DT	Amphenol SGX Sensortech	Air Quality Sensors 4 Series Dual-Tox Sensor-500ppm/200ppm Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	1In Stock	$109.43 $91.92 $69.02 $68.05 View Quote	Min.: 1 Mult.: 1		Electrochemical 4-series	Carbon Monoxide + Hydrogen Sulfide	0 PPM	500 PPM, 200 PPM	Analog			- 30 C	+ 50 C	Through Hole	Electro-Chemical
Air Quality Sensors 4 Series H2S Sensor - 100ppm SGX-4H2S-100 Amphenol SGX Sensortech 1: $52.73 6In Stock 20Expected 26/11/2026	Mfr. Part No. SGX-4H2S-100 Mouser Part No 523-SGX-4H2S-100	Amphenol SGX Sensortech	Air Quality Sensors 4 Series H2S Sensor - 100ppm Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	6In Stock 20Expected 26/11/2026	$52.73 $48.46	Min.: 1 Mult.: 1		Electrochemical 4-series	Hydrogen Sulfide	0 PPM	100 PPM	Analog			- 30 C	+ 50 C	Through Hole	Electro-Chemical
Air Quality Sensors 4 Series Electrochemical Hydrogen Sulfide sensor 300ppm SGX-4H2S-300 Amphenol SGX Sensortech 1: $64.16 2In Stock	Mfr. Part No. SGX-4H2S-300 Mouser Part No 523-SGX-4H2S-300	Amphenol SGX Sensortech	Air Quality Sensors 4 Series Electrochemical Hydrogen Sulfide sensor 300ppm Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	2In Stock	$64.16 $59.09 $57.22 $54.94 View $53.41 $49.07 Quote	Min.: 1 Mult.: 1		Electro-Chemical	H2S	0 PPM	300 PPM	Analog			- 30 C	+ 50 C	Through Hole	Electro-Chemical
Air Quality Sensors 4 Series NO Gas Sensor - 250ppm SGX-4NO-250 Amphenol SGX Sensortech 1: $137.44 8In Stock	Mfr. Part No. SGX-4NO-250 Mouser Part No 523-SGX-4NO-250	Amphenol SGX Sensortech	Air Quality Sensors 4 Series NO Gas Sensor - 250ppm Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	8In Stock	$137.44 $127.61 $123.95 $119.57 View $116.57 $113.34	Min.: 1 Mult.: 1		Electrochemical 4-series	Nitric Oxide	0 PPM	250 PPM	Analog			- 30 C	+ 50 C	Through Hole	Electro-Chemical
Air Quality Sensors 4 Series Electrochemical Hydrogen Chloride 30ppm SGX-HCL-30 Amphenol SGX Sensortech 1: $415.14 2In Stock	Mfr. Part No. SGX-HCL-30 Mouser Part No 523-SGX-HCL-30	Amphenol SGX Sensortech	Air Quality Sensors 4 Series Electrochemical Hydrogen Chloride 30ppm Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	2In Stock	$415.14 $389.71 $379.60 Quote Quote	Min.: 1 Mult.: 1		Gas Sensor	Multi-Gas						- 20 C	+ 40 C	Through Hole	Electro-Chemical
Air Quality Sensors 4 ser O2 sens 0-25% 3 year life SGX-4OX-EL Amphenol SGX Sensortech 1: $81.99 18In Stock	Mfr. Part No. SGX-4OX-EL Mouser Part No 523-SGX-4OX-EL	Amphenol SGX Sensortech	Air Quality Sensors 4 ser O2 sens 0-25% 3 year life Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	18In Stock	$81.99 $75.72 $73.39 $70.58 View $68.67 $64.56 Quote	Min.: 1 Mult.: 1	No	Electrochemical 4-series	Oxygen	0 %	25 %	Analog			- 30 C	+ 50 C	Through Hole	Electro-Chemical
Air Quality Sensors 4 Series Oxygen Sensor 25% 2 yr life SGX-4OX Amphenol SGX Sensortech 1: $50.73 17In Stock 140On Order	Mfr. Part No. SGX-4OX Mouser Part No 523-SGX-4OX	Amphenol SGX Sensortech	Air Quality Sensors 4 Series Oxygen Sensor 25% 2 yr life Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	17In Stock 140On Order	$50.73	Min.: 1 Mult.: 1	No	Electrochemical 4-series	Oxygen	0 %	25 %	Analog			- 30 C	+ 50 C	Through Hole	Electro-Chemical
Air Quality Sensors 4 Series Ammonia Sensor - 100ppm SGX-4NH3-100 Amphenol SGX Sensortech 1: $107.52 45Expected 16/11/2026	Mfr. Part No. SGX-4NH3-100 Mouser Part No 523-SGX-4NH3-100	Amphenol SGX Sensortech	Air Quality Sensors 4 Series Ammonia Sensor - 100ppm Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	45Expected 16/11/2026	$107.52 $99.58 $96.61 $93.08 View $90.66 $88.43 Quote	Min.: 1 Mult.: 1		Electrochemical 4-series	Ammonia	0 PPM	100 PPM	Analog			- 40 C	+ 50 C	Through Hole	Electro-Chemical
Air Quality Sensors 4 Series CO Sensor 1,000ppm SGX-4CO Amphenol SGX Sensortech 1: $54.58 10Expected 24/12/2026	Mfr. Part No. SGX-4CO Mouser Part No 523-SGX-4CO	Amphenol SGX Sensortech	Air Quality Sensors 4 Series CO Sensor 1,000ppm Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	10Expected 24/12/2026	$54.58 $49.84 $46.92 $45.59 View $44.83 $43.93 Quote	Min.: 1 Mult.: 1		Electrochemical 4-series	Carbon Monoxide	0 PPM	2000 PPM	Analog			- 30 C	+ 50 C	Through Hole	Electro-Chemical
Air Quality Sensors 4 Series Lead free O2 Sensor,>5years SGX-4OX-ROHS Amphenol SGX Sensortech 1: $85.35 9Expected 24/12/2026	Mfr. Part No. SGX-4OX-ROHS Mouser Part No 523-SGX-4OX-ROHS	Amphenol SGX Sensortech	Air Quality Sensors 4 Series Lead free O2 Sensor,>5years Learn More about Amphenol SGX Sensortech sgx 4x sensors	Datasheet	9Expected 24/12/2026	$85.35 $78.80 $75.36 $69.48 View $68.41 $63.62 Quote	Min.: 1 Mult.: 1		Electrochemical 4-series	Oxygen	0 %	25 %	Analog			- 40 C	+ 60 C	Through Hole	Electro-Chemical

SGX-4x Electrochemical Sensors

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