SJ41H法兰浮球视镜是指用来观察容器及设备内部物料情况的装置。属安全附件，应定期检查。按形状分为圆形和长方形视镜。按用途分为窥视和照明视镜。按结构分为带衬里和不带衬里、带颈、带罩、双层安全、保温、带刮板、带冲洗装置视镜以及适合于粉状物料用视镜。SJ41H视镜可用于温度高，腐蚀性强、易中毒、危险性较大，易结晶的化工塔器中，让其安全生产。视镜主要由视镜底板、玻璃视镜、阀门组件等组成。

法兰浮球视镜

法兰浮球视镜是一种集液位观察（视镜） 与液位开关控制功能于一体的复合型现场仪表。它通过法兰连接安装在容器侧面，既能通过透明视窗直接观察内部介质情况，又能通过内置浮球的升降驱动外部微动开关，输出开关信号用于液位报警或自动控制。

该设备巧妙地将浮球机构与视镜结合在一起。当液位变化时，浮球随之上升或下降，通过杠杆结构带动外部开关动作。同时，操作人员可随时通过耐压玻璃视窗观察容器内部的液位、流体状态及颜色，实现“一机多用”。

法兰浮球视镜其核心优势在于功能集成、结构紧凑、观察直观、控制稳定，省去了单独安装视镜和液位开关的复杂性和成本，特别适用于需要现场监视和远程控制相结合的场合。

法兰浮球视镜主要特点：

功能集成： 同时具备现场直观观察和液位开关控制两种功能。

结构紧凑： 设计精巧，节省安装空间，简化了管路设计。

观察直观： 提供清晰的观察窗口，可直接监控内部液位和介质状态。

动作稳定： 浮球杠杆传动机构简单稳定，开关信号准确稳定。

维护方便： 通常可在线更换开关组件，而无需清空容器或停止流程。

多种选项： 可提供不同材质（如碳钢、不锈钢、PP）、不同压力等级和多种开关输出形式（如SPDT、双刀双掷）。

法兰浮球视镜典型应用：

广泛应用于石油、化工、制药、食品、水处理、电力等行业的反应釜、储罐、分离器、锅炉等设备上，用于液位的上下限报警、泵的自动启停或设备的连锁控制。

Flanged Float-operated Sight Glass Product Overview

A Flanged Float-operated Sight Glass is an integrated local instrument that combines the functions of visual level observation (sight glass) level switch control. It is mounted on the side of a vessel via flange connections. It only allows for direct visual inspection of the internal medium through a transparent window but also utilizes an internal float to actuate an external micro-switch as the level changes, providing switch signals for level alarm automatic control.

This device ingeniously integrates a float mechanism with a sight glass. The float rises falls with the liquid level, actuating the external switch via a lever mechanism. Simultaneously, operators can continuously observe the internal liquid level, fluid condition, color through the pressure-resistant glass window, achieving "dual functionality in one device."

Its core advantages are functional integration, compact design, intuitive observation, reliable control. It eliminates the complexity cost of installing separate sight glasses level switches, making it particularly suitable for applications that require a combination of local monitoring remote control.

Key Features:

Integrated Functionality: Combines local visual observation level switch control in one unit.

Compact Structure: Ingenious design saves installation space simplifies piping design.

Intuitive Viewing: Provides a clear viewing window for direct monitoring of the internal level medium status.

Reliable Operation: The float-lever transmission mechanism is simple robust, ensuring accurate reliable switch signals.

Easy Maintenance: The switch assembly can often be replaced online without emptying the vessel stopping the process.

Multiple Options: Available in various materials (e.g., Carbon Steel, Stainless Steel, PP), pressure ratings, switch output configurations (e.g., SPDT, DPDT).

Typical Applications:

Widely used on equipment such as reactors, storage tanks, separators, boilers in industries including petroleum, chemical, pharmaceutical, food & beverage, water treatment, power generation for high/low-level alarm, automatic pump control, equipment interlocking.