New optoelectronic devices for the Near and Mid-Infrared spectral range open completely new possibilities for portable sensors creation. Using infrared LED-PD optopairs allows developing an instrument that is smaller, less expensive and energy-saving.

MDS-4 Methane Sensor Module

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MDS-4 is a methane sensor module for CH4 detection. It includes a compact optical cell and electronics for LED power supply and PD signal amplification all-in-one.


✔ Diffusion type detection
✔ Measurement in 0-5% (volume) concentration range
✔ Resolution down to 250 ppm in 0-5% (volume) concentration range
✔ Very low power consumption – 3.5 mW
✔ Quick response time – <2 s
✔ Operating temperature range – 0..+40°C
✔ Size: 55x26x14 mm (including optical cell and circuitry)
✔ Gases: precalibrated for methane, but will respond to most hydrocarbons
✔ Possibility of integration with wireless data transfer protocols like Zigbee, WiFi, GPRS
✔ Possibility of power battery supply


MDS-4 testing results with different methane concentrations: