Air Quality Sensors – Mouser Puerto Rico

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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 (USD) 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: $112.62 2In Stock New Product	Mfr. Part # SGX-4O3-5 Mouser Part # 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	$112.62 $91.51 $87.67 $84.03 View $83.09 $81.35 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: $92.78 29In Stock	Mfr. Part # SGX-4SO2 Mouser Part # 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	$92.78 $86.07 $83.57 $80.58 $78.53	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 Ammonia Sensor - 300ppm SGX-4NH3-300 Amphenol SGX Sensortech 1: $136.47 1In Stock	Mfr. Part # SGX-4NH3-300 Mouser Part # 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	$136.47 $110.98 $86.70 $83.34	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: $68.94 6In Stock	Mfr. Part # SGX-4NO2-2E Mouser Part # 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	$68.94 $67.37 $48.96 $45.45 View $44.13 $41.82 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 High Conc CO Sensor - 10000ppm SGX-4CO-10K Amphenol SGX Sensortech 1: $92.05 6In Stock	Mfr. Part # SGX-4CO-10K Mouser Part # 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	$92.05 $77.65 $67.73 $61.52 View $60.78 $57.83 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 CO Sensor - 1,000ppm SGX-4CO-LC Amphenol SGX Sensortech 1: $47.74 8In Stock	Mfr. Part # SGX-4CO-LC Mouser Part # 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	$47.74 $40.25 $29.61 $28.61 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 4 Series ETO Gas Sensor 20ppm SGX-4ETO Amphenol SGX Sensortech 1: $117.14 14In Stock	Mfr. Part # SGX-4ETO Mouser Part # 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	$117.14 $100.41 $92.21 $86.70 View $86.10 $82.01	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 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: $58.99 17In Stock	Mfr. Part # MP7227-R Mouser Part # 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	$58.99 $52.71 $48.82 $48.81 View $48.40 $47.31 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 Nitrogen Dioxide Sensor-30ppm SGX-4NO2 Amphenol SGX Sensortech 1: $47.10 27In Stock	Mfr. Part # SGX-4NO2 Mouser Part # 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	$47.10 $43.38 $41.99 $40.33 View $39.19 $36.70	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 Electrochemical Fluorine 5ppm SGX-F2-5 Amphenol SGX Sensortech 1: $273.18 9In Stock	Mfr. Part # SGX-F2-5 Mouser Part # 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	$273.18 $259.18	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 Bromine 5ppm SGX-BR2-5 Amphenol SGX Sensortech 1: $262.67 23In Stock	Mfr. Part # SGX-BR2-5 Mouser Part # 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	$262.67	Min.: 1 Mult.: 1		Gas Sensor	Multi-Gas						- 20 C	+ 40 C	Through Hole	Electro-Chemical
Air Quality Sensors 4 Series Electrochemical Hydrogen Fluoride 10ppm SGX-HF-10 Amphenol SGX Sensortech 1: $184.22 6In Stock	Mfr. Part # SGX-HF-10 Mouser Part # 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	$184.22 $151.23 $146.50 $143.28 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 Ammonia Sensor - 1000ppm SGX-4NH3-1000 Amphenol SGX Sensortech 1: $97.82 33In Stock	Mfr. Part # SGX-4NH3-1000 Mouser Part # 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	$97.82 $90.80 $82.90 $74.39 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: $125.41 5In Stock	Mfr. Part # SGX-4CL2 Mouser Part # 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	$125.41 $115.11 $86.70 $86.50 $83.34	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: $80.46 1In Stock	Mfr. Part # SGX-4DT Mouser Part # 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	$80.46 $67.59 $50.75 $50.04 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: $38.77 6In Stock 20Expected 11/26/2026	Mfr. Part # SGX-4H2S-100 Mouser Part # 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 11/26/2026	$38.77 $35.63	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: $47.18 2In Stock	Mfr. Part # SGX-4H2S-300 Mouser Part # 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	$47.18 $43.45 $42.07 $40.40 View $39.27 $36.08 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: $101.06 8In Stock	Mfr. Part # SGX-4NO-250 Mouser Part # 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	$101.06 $93.83 $91.14 $87.92 View $85.71 $83.34	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: $305.25 2In Stock	Mfr. Part # SGX-HCL-30 Mouser Part # 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	$305.25 $286.55 $279.12 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: $60.29 18In Stock	Mfr. Part # SGX-4OX-EL Mouser Part # 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	$60.29 $55.68 $53.96 $51.90 View $50.49 $47.47 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: $37.30 17In Stock 140On Order	Mfr. Part # SGX-4OX Mouser Part # 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	$37.30	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: $79.06 45Expected 11/16/2026	Mfr. Part # SGX-4NH3-100 Mouser Part # 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 11/16/2026	$79.06 $73.22 $71.04 $68.44 View $66.66 $65.02 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: $40.13 10Expected 11/26/2026	Mfr. Part # SGX-4CO Mouser Part # 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 11/26/2026	$40.13 $36.88 $34.54 $33.52 View $32.96 $32.30 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: $62.76 9Expected 12/24/2026	Mfr. Part # SGX-4OX-ROHS Mouser Part # 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 12/24/2026	$62.76 $57.94 $55.41 $51.09 View $50.30 $46.78 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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