HS-S11P Gas Detection Sensor Module - PH2.0 2/3P Terminal, Analog & Digital Output

The HS-S11P module is designed to operate on a wide DC voltage range from 3.3V to 5.5V. This makes it directly compatible with both 3.3V logic systems like ESP32 and 5V systems like standard Arduino boards without requiring a level shifter.

The module provides separate pins for analog (A) and digital (D) output. Connect the analog pin to an ADC input on your microcontroller to read a voltage proportional to gas concentration. The digital pin outputs a high/low signal based on a preset threshold, which can be adjusted via the onboard potentiometer for sensitivity control.

This module uses a PH2.0 2/3P terminal block connector. The pins are typically labeled: V (for power supply positive), G (for ground), and A/D for the output signals. You simply insert stripped wire ends into the corresponding terminal slots for a secure connection without soldering.

The HS-S11P utilizes a semiconductor gas sensing element sensitive to a broad range of combustible gases and volatile organic compounds (VOCs), such as LPG, methane, alcohol, and smoke. It is a general-purpose sensor best suited for qualitative presence detection and relative concentration changes rather than precise identification of a single gas.

For basic digital threshold detection, you can adjust the onboard potentiometer to set the trigger point in your specific environment. For quantitative analog readings, you should establish a baseline reading in clean air and may need to develop a calibration curve for your target gas through testing, as the module is typically not pre-calibrated for specific gas concentrations.