以下是E3K55-DS30P1光电开关的产品中英文介绍：

E3K55-DS30P1光电开关是一种漫反射式光电传感器，采用PNP常开输出方式。它通过检测被测物体对光束的反射来判断物体是否存在。该光电开关的检测范围为30cm，精度在±10%以内，能够检测不透明物体。其响应时间为DC1ms，接通延时为1.5ms，电源电压为DC12-24V，可在6-36V的脉动电压（P-P）10%以下的范围内正常工作。该产品耐电压为AC1000V，在额定电源电压范围±15%以内以及额定电源电压值时±10%检测距离以内，性能稳定。

The E3K55-DS30P1 photoelectric switch is a diffuse reflection type photoelectric sensor with PNP normally open output. It detects the presence of objects by sensing the reflection of light beams from the objects. This photoelectric switch has a detection range of 30cm with a precision of ±10%, and it is capable of detecting opaque objects. Its response time is DC1ms, the turn-on delay is 1.5ms, and the power supply voltage is DC12-24V. It can operate normally within a pulsating voltage range of 6-36V (P-P) 10%. The product has a voltage endurance of AC1000V, and it performs stably within ±15% of the rated power supply voltage range and ±10% of the detection distance at the rated power supply voltage.

E3K55-DS30P1光电开关的生产厂家之一是上海双旭电子有限公司，该公司是一家专业生产光电开关的企业。

E3K55-DS30P1光电开关的价格因市场供需、销售渠道等因素会有所波动，具体价格建议咨询相关供应商或厂家。