Smoke and Propane Gas Sensor, 200~10000ppm

This smoke and gas sensor for sale utilizes highly sensitive semiconductor materials and is specifically designed to detect propane and smoke gases with a detection range of 200-10000 ppm. The gas sensor supports both DC and AC heating voltages, consumes as little as 240mW, and is housed in a metal cap for durability and long-term storage and stable operation.

Feature

• This smoke detection gas sensor utilizes a multi-layer thick-film manufacturing process.
• A heater and a metal oxide semiconductor gas-sensing layer are fabricated on either side of a micro Al₂O₃ ceramic substrate, encapsulated within a metal housing.
• When the target gas is present in the ambient air, the sensor's conductivity changes. The higher the gas concentration, the higher the sensor's conductivity.
• A simple circuit converts this conductivity change into an output signal corresponding to the gas concentration.

Dimension (unit: mm)

Basic Circuit

Description: The figure on the left shows a basic smoke sensor test circuit. A smoke sensor requires two voltages: A heater voltage (V_H) and a test voltage (V_C). VH provides the sensor with a specific operating temperature and can be powered by either a DC or AC power supply. V_RL is the voltage across the load resistor (R_L) connected in series with the gas sensor. V_C is the test voltage across the load resistor R_L and requires a DC power supply.

Pin Definition

As shown in the figure, pins 1 and 2 of the smoke sensor connect to the heating circuit, and pins 3 and 4 connect to the measurement circuit. Heating and measurement can share the same power supply circuit, provided the sensor's electrical performance requirements are met. Note: Please note the prominent mark on the gas sensor; the two pins adjacent to the mark are the heating electrodes.

Sensor Curve

Typical Logarithmic Sensitivity Curve

Typical Tempe and Humidity Curve