Research Options for Methane Sensor / Create Sensor Trade Matrix

[keenanjohnson]

[josuah]

Going for a web search brings up a lot of Aliexpress links featuring a sensor witten MQ-4 on it.

Further search about that MQ-4 leads us to this:
https://www.sparkfun.com/products/9404
https://www.sparkfun.com/datasheets/Sensors/Biometric/MQ-4.pdf

200 to 10000ppm
Is 200 part per million sensible enough?

The manufacturer seems oriented toward practical uses for these, such as detecting "anything hazardous" rather than one particular gas:
https://www.hwsensor.com/

Yet, an inventory search for that parts reveals the category with many other similar parts, and here we have our full range of gas sensors, this is the right place with all kind of specs

https://www.digikey.fr/en/products/filter/gas-sensors/530
https://eu.mouser.com/c/sensors/environmental-sensors/air-quality-sensors/
https://www.arrow.com/en/categories/sensors/air-quality-sensors

Maybe that can lead to one sensor having multiple kind of gas, barometer... all included.
But at least we can compare now.

[keenanjohnson]

@hansenni let's use this issue to track your work to create a sensor comparison matrix as we discussed today.

[hansenni]

@keenanjohnson sounds like a plan. I'll start with CO2 sensors and head towards methane. After that we can discuss particulate, VOC, or anything else of interest

[keenanjohnson]

Hey @hansenni. How is this going?

[hansenni]

On track to finish CO2 sensors this week I believe. Work got a bit busier this week or it would already be done.

[hansenni]

Sensor	Technology	Measurement Range (ppm)	Accuracy	Supply Voltage	Average Current	Interface	Dimensions	Operating Temperature Range	Price (if available)	Link
Senseair K33 ELG	NDIR	400-5000 ppm	± (30 ppm + 3%MV)	4.75-12VDC 3 maximum rating, powered via Vbat+ 5.5-12VDC3 maximum rating, powered via G+	<52uA (1 measurement/hour)	UART, I2C	11.80mm x57.15x50.80	0-50 °C	~180 USD	https://www.co2meter.com/products/k33-environmental-logger-co2-sensor
Senseair K30	NDIR	0-5000 ppm Up to 10000 ppm extended range	± (30 ppm +3% of reading)1 (Extended range+10% of reading)	4.5 - 14.0 V DC maximum rating	40 mA average	Analog, UART	51 x 58 x 12	0-50 °C	~78 USD	https://www.co2meter.com/products/k-30-co2-sensor-module
MH-Z19	NDIR	0 – 0.5% VOL optional	± (50ppm + 5% reading value)	3.6 ~ 5.5 V DC	< 18 mA	UART, PWM	33 mm x 20 mm x 9 mm (LxWxH)	0 ~ 50 ℃	~34 USD	https://www.amazon.com/MH-Z19-MH-Z19B-Sensor-Infrared-0-5000ppm/dp/B07VCS9VBM
SCD40/41	Photoacoustic NDIR sensor technology PASens®	SCD40: 400 – 2,000 ppm, SCD41: 400 – 5,000 ppm	SCD40: ±(50 ppm + 5% of reading) for 400 – 2,000 ppm; SCD41: ±(50 ppm + 2.5% of reading) for 400 – 1,000 ppm, ±(50 ppm + 3% of reading) for 1,001 – 2,000 ppm, ±(40 ppm + 5% of reading) for 2,001 – 5,000 ppm	2.4 – 5.5 V	5 sec: 11 – 15 mA, 30 sec: 3.2 – 3.5 mA (5V)	Digital I2C	10.1 x 10.1 x 6.5 mm3	-10 – 60 °C	SCD41: ~50USD, SCD40: ~45USD	https://www.adafruit.com/product/5190
SCD30	NDIR CO2 sensor technology	400 ppm – 10,000 ppm	± (30 ppm + 3%MV)	3.3 V – 5.5 V	19 mA @ 1 meas. per 2 s.	UART, I2C	35 mm x 23 mm x 7 mm	0 – 50°C	~59 USD	https://www.adafruit.com/product/4867
Murata IMG-CA0012-00	Dual Wavelength NDIR	0 – 2,000 ppm / 0 – 3,000 ppm	±(50ppm + 5% of reading); Typ. ±(30ppm + 2.5% of reading)	AC/DC 24V, DC 12V	Power: Avg. 0.5W / Max. 2.0W	Analog 0 – 5V	67 x 92 x 20mm	0 – 50 ℃	~330-450 USD	https://octopart.com/search?q=IMG-CA0012-00&currency=USD&specs=0
Amphenol T6613-5k	NDIR	0-5000 ppm	± (30 ppm + 5%MV)	5 VDC	0.90 Watts peak, 0.165 Watts average	Analog 0-4VDC, I2C UART	57.15 mm X 34.67 mm X 15.24 mm	0℃ to 50℃	~80-90 USD	https://www.mouser.com/ProductDetail/Amphenol-Advanced-Sensors/T6613-5K?qs=kuz%252BBOU0nbaGhguTJzCo3w%3D%3D
Infineon PASCO2V01	PAS	0-32000	± (30 ppm + 3%MV)	3-3.6 VDC, 10.8-13.2 VDC	30mW Average	I2C, UART, and PWM	13.8 x 14 x 7.5 mm3	0 – 50 ℃	~37 USD	https://www.mouser.com/ProductDetail/Infineon-Technologies/PASCO2V01BUMA1?qs=tlsG%2FOw5FFi%2F2GzH4aKc4g%3D%3D&mgh=1
Senseair S8 Commercial	NDIR	0-10000 ppm	± (30 ppm + 3%MV)	4.5-5.25V	300mA peak, 30mA average	UART, Modbus	33.9 x 19.8 x 8.7 mm3	0 – 50 ℃	~47 USD	https://www.co2meter.com/products/004-0-0010-senseair-s8-commercial-co2-sensor