A: Generally an LPG sensor works like a combustable gas sensor in that it is sensitive to not just LPG but other flamable gases as well. (Natural, Methane, Coal gas, butane etc...) It works by comparing a change in resistance between two heated elements. One heated element is a reference that is isolated from the sample gas. The other element is identical except that it is exposed to the sample. 

Catalytic oxidation of the target gas contained in the sample causes an increase in heat and a corresponding change in resistance. The two heated resistive elements are part of a balanced wheatstone bridge. The changes in resistance between these cause an imbalance in resistance and a change in current flow in the bridge that can be measured as a voltage. 

The voltage can then be measured by an ADC and computed into a ppm value by a microcontroller for display.

A: In clean air of temperature 20℃±2℃ and humidity 65%±5%RH.

A: Warm-up Time: The time cost from sensor power on to the sensor output vale is stable.
Response Time: The time cost of 90% stable sensor output value, under step changes of the detection gas concentration in testing conditions.

A: MP series advantage: Smaller size, lower power consumption, better consistency and shock resistance performance.
MQ series advantage: Good stability, longer lifespan

A: Under normal conditions, the expected life of MQ series sensors is more than 10 years.
The actual lifespan depends on the application environment and the using methods.

A: Under normal conditions, the expected life of MP series sensors is more than 5 years.
The actual lifespan depends on the application environment and the using methods.

A: ppm: parts per million
VOL: volume ratio
LEL: lower explosive limit
NDIR: Non-Dispersive Infra-Red

A: For electronic components, burn-in is frequently conducted at elevated temperature and perhaps elevated voltage. This process may also be called heat soaking. The components may be under continuous test or simply tested at the end of the burn-in period.

A: Winsen will select the most appropriate way of transportation, according to customer's requirement.
We ensure the on time shipment by choosing experienced forwarder.

A: Reference lead times: 1~15days after receiving the deposit.
The actual lead time can be informed by Order Processing Dept. when ordering.

A: T/T advance (Telegraphic Transfer).

A: Different products model have different MOQ, please contact us for details.

A: Customer LOGO and packing design are accepted.
Customized design and function will be offered freely (including molding).

A: Sample order is accepted, and the fees will be borne by buyer.

A: All Winsen products are under strict inspection and testing before they come off the production line to make sure they are 100% qualified.