--- title: "Hydrogen (H₂) Sensors & Monitoring | Aethair" description: "Hydrogen (H₂) is a flammable gas monitored by fixed gas-detection systems in mining and heavy industry. How H₂ detection works and what is planned." url: https://aethair.io/parameters/h2/ --- Measurements · Gases & VOCs # Hydrogen (H₂) Hydrogen is a flammable gas, and continuous H₂ detection belongs to the fixed gas-detection systems used in mining and heavy industry, where a leak has to raise an alarm before it builds up. [Schedule a call](https://calendly.com/d/ctdd-mkr-v9v/aethair-demo-website) [Configure Hydrogen (H₂) Monitoring](https://aethair.io/build/?params=h2) At a glance ppm Gases & VOCs 1 way to measure it - **Thiamis** 1 external instrument What it is ## What is hydrogen (H₂) monitoring? Hydrogen is a flammable gas, and continuous H₂ detection belongs to the fixed gas-detection systems used in mining and heavy industry, where a leak has to raise an alarm before it builds up. In the sensor catalog, hydrogen comes from one instrument, the Trolex Sentro X, which is listed as planned: it is cataloged, but its integration with Environet is not yet connected. That platform is the [Trolex Sentro X](https://aethair.io/sensors/trolex-gas-detectors/) (TX6310), a fixed gas-detection controller that takes a single hot-swappable, self-identifying gBloc sensor module. One approved gBloc measures hydrogen to 1000 ppm; others cover CO, H₂S, NH₃, NO, NO₂, O₂, SO₂, CH₄, and CO₂. Each reports its live concentration together with STEL and TWA values. How it is measured ## How Hydrogen (H₂) Is Measured The gBloc is an intrinsically safe, pre-calibrated sensing module that plugs into the Sentro X controller or a remote sensor and can be swapped with the power applied; it carries its own gas type, range, and serial number, so the controller knows what it is reading. The Sentro X reports over RS485 Modbus RTU, 4–20 mA, and 0.4–2 V outputs. Until the Sentro X integration is connected, hydrogen has no live source in Environet: no Aethair monitor or Aethair PRO cartridge measures it, and no other cataloged instrument lists it. An instrument on Thiamis 1 A third-party instrument connected to a Thiamis gateway, reporting into the same Environet account. ### Every device and option that measures Hydrogen (H₂) 1 | Device / option | Type | Base platform | Measures | | - | - | - | - | | [Trolex](https://aethair.io/sensors/trolex-gas-detectors/) · Sentro X (TX6310) | Gas Detectors | Thiamis | Hydrogen (H₂) [Methane (CH₄)](https://aethair.io/parameters/ch4/) [Carbon Monoxide (CO)](https://aethair.io/parameters/co/) [Carbon Dioxide (CO₂)](https://aethair.io/parameters/co2/) [Hydrogen Sulfide (H₂S)](https://aethair.io/parameters/h2s/) [Ammonia (NH₃)](https://aethair.io/parameters/nh3/) [Nitric Oxide (NO)](https://aethair.io/parameters/no/) | [Configure Hydrogen (H₂) Monitoring](https://aethair.io/build/?params=h2) Related ## More in Gases & VOCs [Carbon Dioxide (CO₂)](https://aethair.io/parameters/co2/) [VOC (Total)](https://aethair.io/parameters/voc/) [Hydrogen Sulfide (H₂S)](https://aethair.io/parameters/h2s/) [Carbon Monoxide (CO)](https://aethair.io/parameters/co/) [Methane (CH₄)](https://aethair.io/parameters/ch4/) [Oxygen (O₂)](https://aethair.io/parameters/o2/) [Sulfur Dioxide (SO₂)](https://aethair.io/parameters/so2/) [Nitric Oxide (NO)](https://aethair.io/parameters/no/) [Nitrogen Dioxide (NO₂)](https://aethair.io/parameters/no2/) [Ammonia (NH₃)](https://aethair.io/parameters/nh3/) [Combustible (LEL)](https://aethair.io/parameters/lel/) [Chlorine (Cl₂)](https://aethair.io/parameters/cl2/) Questions ## Hydrogen (H₂) FAQ Which instrument in the sensor catalog measures hydrogen? The Trolex Sentro X (TX6310) fixed gas-detection platform, with its hydrogen gBloc, which measures H₂ to 1000 ppm. Can I monitor hydrogen live today? Not yet. The Sentro X is cataloged as planned, and no Aethair monitor, Aethair PRO cartridge, or other cataloged instrument measures hydrogen. What does the Sentro X report besides the concentration? STEL and TWA values for the gas, and a %LEL alarm for flammable gases, over RS485 Modbus RTU, 4–20 mA, and 0.4–2 V.