MemsFrontier MPY20-A112T Pyroelectric Infrared Gas Sensor Module - TO-39 Package, Dual Channel

The MPY20-A112T pyroelectric sensor can operate from 2 to 12 volts DC. The manufacturer recommends a supply voltage between 2V and 10V for optimal performance and signal stability. Ensure your power supply is clean and regulated to minimize noise on the sensitive analog output.

This sensor operates in voltage mode with a built-in JFET source follower. The output should be connected to a high-impedance input, with an optimum load resistance of 47kΩ. For best results, feed the signal into a non-inverting op-amp configuration with appropriate gain and filtering to condition the analog voltage for your ADC or microcontroller.

The MPY20-A112T itself is a broadband infrared detector sensitive from 1 to 20 micrometers. It does not selectively detect a specific gas. To create a gas sensor, it must be used as the detector in a Non-Dispersive Infrared (NDIR) system, which includes an IR source, a sample cell, and optical filters. The specific gas detected (e.g., CO2, CH4) is determined by the wavelength of the optical filter placed in front of the sensor.

No, the MPY20-A112T is supplied as a standalone sensor module in a TO-39 package. It does not include a connector, cable, or any external signal conditioning circuitry. You will need to solder leads to its pins and design an external circuit (typically involving a JFET biasing network and an operational amplifier) to buffer and amplify its output signal.