The Zhong'an S100 type oil and gas gas detector is mainly applied in oil depot oil and gas recovery equipment, gas station tertiary oil and gas recovery equipment, chemical plant oil and gas recovery equipment, and oil and gas recovery online monitoring system equipment. This detector adopts the infrared detection principle, has a long lifespan, precise detection, and basically requires no maintenance, greatly improving the overall performance of the equipment. At the same time, this detector can be optionally equipped with various output signals such as 4-20mA and RS485 signals for connection to multiple systems such as PLC and DCS to achieve full automation of oil and gas recovery. For oil and gas recovery systems with added AI systems, intelligent control is realized. This detector is also equipped with switching quantity signals and can also achieve direct linkage control of the oil and gas recovery pump without a PLC microprocessor. The process is simple and convenient, and it is easy to achieve automatic recovery.