Hydrogen is a colorless, odorless, nonmetallic, tasteless, highly-flammable gas. Hydrogen reacts with every oxidizing element. Reactions with Hydrogen are dangerous and may cause fire or explosion. Gas/Air mixtures are explosive. Hydrogen is not toxic, but it is an asphyxiate and will cause suffocation as it displaces the oxygen from the air. High concentrations hydrogen in the air cause a deficiency of oxygen which can result in dizziness, unconsciousness, or death. Hydrogen levels in the air are usually measured in parts per million (ppm).
The FIS3042 series is a great quality/price ratio safety device, able to provide one or two alarms when a defined level of hydrogen is reached in ambient conditions. It gets the SB-42A-11 gas sensor inside. It is available in either a naked version or with a waterproof case - see table below.
Main Features
Target Gas: Hydrogen
Supply voltage: 5 ± 0.25V DC
Output: single or double alarm signal provided with CMOS output
