Honeywell Gas Detection · Industry Applications

Product & Technology Selection

For WWTP applications, detector selection should cover sensing principle, range, response time, hazardous area rating, ingress protection, and maintenance. H₂S/CH₄/O₂ mandatory; digester areas add methane LEL; optional NH₃ at disinfection; mandatory portable testing before gallery entry.

Selection Principles

• Combustible gas: catalytic for non-inhibited atmospheres; IR for poisoned environments (offshore, tank farms)
• Toxic gas: electrochemical sensors with cross-interference and range matching (e.g. H₂S 0–50 ppm)
• Oxygen: monitor both deficiency (<19.5%) and enrichment (>23.5%)
• Installation: High humidity, corrosive, poor ventilation, dense coverage — 316 stainless housing, IP66+ outdoors
• Outputs: 4-20mA and Modbus RTU for DCS/SCADA integration

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