We're trying to create an IoT device that can detect/mesaure H2S in ambient air with a
lower detection limit of 1 ppb or 0.001 ppm
However, checking Digikey and other similar suppliers, I haven't found any sensors that fit this requirement. Below are examples of what I've found:
ZE03 Electrochemical Gas Sensor Module: https://www.winsen-sensor.com/d/files/PDF/Gas%20Sensor%20Module/Industrial%20Application%20Gas%20Sensor%20Module/ZE03%20Electrochemical%20Module%20V2.4.pdf
What we've found are already existing devices, which are classified as H2S Analyzers:
Model T101 UV Fluorescence H2S Analyzers: http://www.teledyne-ml.com/products_/instruments/gaseous/sulfur/Documents/T101.pdf
Serinus 55 H2S Analyzers: https://www.ecotech.com/wp-content/uploads/2018/01/ECOTECH-Serinus-55-Brochure.pdf
We've already considered integrating with existing devices, but we want to see if we can develop our own device.
Does anyone know of a commercially-available sensor that can fit this requirement?
Or perhaps, a company that makes these sensors on request?