产品中文介绍：
WZPK-425U型电接点双金属温度计是一款基于金属热膨胀原理设计的工业级温度测量仪表。该产品通过双金属敏感元件的形变特性实现温度感应，并结合电接点装置实现温度信号的输出与控制功能。整机采用一体化结构设计，表壳与测量元件之间采用密封工艺处理，可适应多种工业环境的长期稳定运行需求。
产品核心组件由多层精密合金片经特殊工艺复合而成，通过金属层间热膨胀系数的差异实现温度-形变的高灵敏度响应。表头部分配备可旋转刻度盘及双指针系统，主指针实时指示当前温度值，辅助指针可通过外部调节预设温度阈值。当被测介质温度达到预设值时，电接点装置将触发信号输出，适用于设备过热保护、温度联锁控制等工业自动化场景。
该型号温度计采用径向安装结构，测量杆长度可根据用户需求定制（常规规格为75-500mm），过程连接件支持螺纹或法兰等标准接口。表壳选用304不锈钢材质，表面经拉丝工艺处理，防护性能可达工业防尘防水要求。观测窗采用钢化玻璃材质，配合高对比度刻度标识，确保在复杂光线条件下的读数清晰度。工作温度范围覆盖-40℃至400℃，基本误差控制在量程范围的±1.5%以内。
产品广泛应用于食品加工设备的温度监控、化工反应釜的温度保护、暖通空调系统的温度调节等场景。其结构设计考虑了现场维护便利性，在不拆卸仪表的情况下可通过顶部调节旋钮进行参数设定。为适应不同工况需求，电接点额定负载可提供多种规格选配，触点材料采用银合金材质以增强电气耐久性。安装时建议保持测量杆完全浸入被测介质，避免剧烈机械振动环境，定期进行示值校验可延长产品使用寿命。
产品英文介绍：
The WZPK-425U Bimetal Thermometer with Electrical Contact is an industrial-grade temperature measurement instrument based on the thermal expansion principle of metallic materials. Utilizing the deformation characteristics of a bimetallic sensing element for temperature detection, this device integrates electrical contacts to enable temperature signal output and control functions. The compact unitary structure features sealed connections between the housing and sensing components, ensuring reliable performance in various industrial environments.
At the core of the device lies a multi-layer precision alloy composite formed through specialized processing techniques. The differential thermal expansion coefficients between metal layers enable highly responsive temperature-deformation conversion. The dial assembly incorporates a rotatable scale plate with dual indicating needles - the primary needle displays real-time temperature while the auxiliary needle allows preset threshold adjustment via external calibration. When the measured temperature reaches the preset value, the electrical contact mechanism activates signal transmission, suitable for equipment overtemperature protection and process automation control applications.
Designed with radial mounting configuration, the thermometer s immersion length can be customized from 75mm to 500mm according to application requirements. Process connections accommodate standard threaded or flanged fittings. The 304 stainless steel housing with brushed surface finish provides adequate protection against environmental factors. The viewing window utilizes tempered glass combined with high-contrast scale markings to ensure readability under challenging lighting conditions. Operational temperature range spans from -40℃ to 400℃ with basic accuracy maintained within ±1.5% of span.
This model finds typical applications in temperature monitoring for food processing equipment, overheat protection of chemical reactors, and climate control systems in HVAC installations. The maintenance-friendly design allows parameter adjustment via top-mounted calibration knob without disassembling the instrument. Multiple contact load ratings are available to match different operational requirements, with silver alloy contacts enhancing electrical durability. For optimal performance, complete immersion of the sensing stem in the measured medium is recommended, along with avoidance of excessive mechanical vibration. Periodic verification helps maintain measurement accuracy and prolong service life.
