Amphenol SGX Sensortech Multi-Gas Detection Sensor NH3, CO, CH3OH, H2, CH4 10-1000ppm

The sensor's integrated heater typically operates at 2.4V DC with a current draw of approximately 32mA, resulting in a power dissipation of up to 88 mW. This low-power design is suitable for battery-powered devices. External circuitry must provide a stable, regulated voltage source within these specifications for proper sensor operation and stable baseline performance.

This multi-gas sensor detects Ammonia (NH3) from 1 to 500 ppm, Carbon Monoxide (CO) from 1 to 1000 ppm, Ethanol (C2H5OH) from 10 to 500 ppm, Hydrogen (H2) from 1 to 1000 ppm, and Methane (CH4) at concentrations above 1000 ppm. It is a broad-spectrum detector ideal for monitoring both toxic and combustible gases in environmental and safety applications.

This component is a raw sensing element, not a complete module with digital output. It requires external signal conditioning circuitry to measure the electrochemical cell's output signal, which is typically a small current or voltage change proportional to gas concentration. Designers must implement appropriate amplification, filtering, and analog-to-digital conversion (ADC) stages, often followed by calibration against known gas concentrations for accurate readings.

The sensor is rated for continuous operation within an ambient temperature range of -25°C to +85°C. For storage and transportation, it can withstand temperatures from -40°C to 120°C. Maintaining operation within the specified ambient range is crucial for measurement accuracy and long-term sensor stability, as extreme temperatures can affect the electrochemical reactions and heater efficiency.