I am trying to find a sensor(like a CO2 sensor) that can measure or is already set up to measure a different frequency. The frequency that I am trying to measure is between 2900-3000. As I understand, that would require changing the Optical filter in a CO2 sensor to let through the correct frequency.
Is there a sensor that can already do this, would I have to get a custom sensor made or am I looking at the wrong type of sensor for this application?
Thank you for any help you can provide
Is Methane your target ?
no unfortunally not the target
Have a custom optical filter made for an existing CO2 NDIR sensor. Naturally that would require dismantling, modifying and recalibrating the sensor.
am I looking at the wrong type of sensor for this application?
Seems likely, but if you can’t reveal the application, you can’t expect a better answer.
It takes more than simply changing the filter to a different spectrum.
Generally NDIR sensors like the CO2 sensors measure at TWO different wavelengths one that CO2 absorbs and another that CO2 passes without absorption. Then a log/log ration of the two values is used to compute the likely gas concentration.
That’s the easy part, the more difficult parts are measuring the VERY small difference in the sensor values AND the second is creating a sensing chamber that has enough area or length such that the energy from the particular wavelength can actually be absorbed and a difference measured.
I’d do some deep digging into various sensor magazines and technical journals and better define the gas / gases in question. Sometimes there are easier ways to measure the gas.
And you also need to determine what other gases might also be absorbed in the target ranges and/if they would result in measurement errors.
Finally air density, temperature, and humidity all impact the measurements.