GDK-3系列光电开关是一种广泛应用于工业自动化领域的检测设备。它采用先进的光学传感技术，通过红外线光波作为检测媒介，实现对物体存在、位置或移动状态的非接触式检测。该系列光电开关具有多种型号，如GDK-3-R6N2、GDK-3-DS80M1等，其检测距离一般为80cm，工作电压为DC10-30V，输出形式为NPN常开式。其外壳采用坚固的ABS工程塑料，具备良好的抗冲击性和耐腐蚀特性，可在-25℃至+55℃的温度范围内稳定运行。此外，GDK-3系列光电开关还具备体积小、功能齐全、电线引出式、电源内藏式、具备继电器大功率输出、电压范围宽、抗震性能好等优点。在价格方面，根据不同的型号和配置，其价格会有所不同，具体可咨询相关生产厂家。目前，GDK-3系列光电开关的生产厂家有上海双旭电子有限公司、上海五久自动化设备有限公司等，这些厂家不仅具有专业的技术水平，还提供良好的售后服务和优质的解决方案。

The GDK-3 series photoelectric switches are industrial-grade detection devices that utilize advanced optical sensing technology. They use infrared light waves as the detection medium to achieve non-contact detection of the presence, position, or movement status of objects. This series of photoelectric switches includes various models, such as GDK-3-R6N2 and GDK-3-DS80M1, with a detection distance of generally 80cm, a working voltage of DC10-30V, and an NPN normally open output form. The switches are housed in robust ABS engineering plastic enclosures, which offer excellent impact resistance and corrosion resistance. They can operate stably within a temperature range of -25℃ to +55℃. Moreover, the GDK-3 series photoelectric switches have several advantages, including compact size, comprehensive functions, wire lead-out design, built-in power supply, relay high-power output capability, wide voltage range, and good anti-vibration performance. In terms of price, the cost varies depending on the model and configuration, and it is recommended to consult the relevant manufacturers for specific prices. The manufacturers of the GDK-3 series photoelectric switches include Shanghai Shuangxu Electronics Co., Ltd and Shanghai Wujiu Automation Equipment Co., Ltd. These manufacturers not only possess professional technical capabilities but also provide good after-sales service and high-quality solutions.