右下精器MigishitaSeiki微压计CA311-212 0~60kPa AT-3/8R*75*60kPa
品牌：右下精器 MIGISHITA SEIKI
品名：微压计
型号：CA311-212 0~60kPa （AT-3/8R*75*60kPa）
功能：过压防止装置付（可选此规格)
0点调整付装置（可选此规格)
压力范围：0~60kPa
原产地：日本
右下精器MigishitaSeiki微压计CA311-212 0~60kPa AT-3/8R*75*60kPa
压力表G螺纹和R螺纹区分
微压压力表（以 kPa 为单位）是用于测量低压力范围（通常指几 kPa 至几百 kPa，具体因型号而异）的压力仪表，其设计和性能特点均围绕 “精准测量微小压力变化" 展开，广泛应用于对压力灵敏度要求高的场景。以下是其核心特点：
1. 量程针对性强，聚焦低压力范围
量程通常集中在0~60kPa、-10~50kPa（负压与正压结合）等低范围，Min.分度值可低至 0.1kPa 甚至 0.01kPa，能精准捕捉微小的压力波动（如通风系统的风压、炉膛微压、气体管道的轻微压力变化等）。
与常规压力表（量程多为MPa）相比，避免了因量程过大导致的低压力段测量精度不足问题。
2. 高灵敏度与高精度
采用敏感弹性元件（如膜片、波纹管、膜盒等），而非常规压力表的弹簧管（波登管）。这些元件在微小压力作用下即可产生明显形变，通过机械传动放大后驱动指针，确保对低压力的灵敏响应。
精度等级较高，常见1.0 级、0.5 级（误差范围为量程的 ±1.0%、±0.5%），部分精密型号可达 0.25 级，满足对低压力测量的精准需求。
3. 结构设计适配微压场景
防过载能力：因测量范围低，内部通常设有过载保护装置（如限位块），避免因意外超压损坏敏感元件。
连接方式灵活：多采用小型化接口（如 R1/4、G1/4 、R3/8 、G3/8 等），适配纤细管道或小型设备，安装时对系统压力损失影响小。
表盘清晰易读：表盘刻度细密，且针对低压力范围优化刻度分布（如在 0~10kPa 区间刻度更密集），便于读取微小压力值。
4. 适用介质与环境广泛
介质兼容性：可测量对铜、合金无腐蚀的气体（如空气、氮气）或低粘度液体，部分耐腐蚀型号（如不锈钢材质）可用于轻微腐蚀性介质。
环境适应性：能在常温、低振动环境下稳定工作，部分型号具备防尘、防潮设计（如 IP54 防护），适合通风空调、实验室、环保等场景。
5. 典型应用场景
通风与空调系统：测量风管内的静压、动压（如 ±5kPa）。
环保与气象：监测烟道微压、大气压力微小变化。
实验室：校准低压力设备、测量小型容器内的压力。
食品医药：包装设备内的微小气压控制（如真空包装的预压阶段）。
总结
微压压力表（kPa 级）的核心优势在于对低压力的高精度、高灵敏度测量，通过针对性的量程设计和敏感元件选型，解决了常规压力表在微小压力段 “测不准、读不清" 的问题，是低压力监测场景中常见的仪表。
Migishita Seiki Micro- Pressure Gauge
CA311-212 0~60kPa AT-3/8R7560kPa
Brand: Migishita Seiki
Product Name: Micro Pressure GaugeModel: CA311-212 0~60kPa（AT-3/8R7560kPa）
Functions:Equipped with overpressure protection device (optional specification)Equipped with zero adjustment device (optional specification)
Pressure Range: 0~60kPaOrigin: Japan
Migishita Seiki Micro Pressure Gauge CA311-212 0~60kPa AT-3/8R7560kPaMicro Pressure Gauge CA311-212 0~60kPa AT-3/8R7560kPa
Difference between G Thread and R Thread for Pressure Gauges
Micro pressure gauges (kPa unit) are pressure instruments designed for measuring low pressure ranges (generally several kPa to hundreds of kPa, depending on models). Their design and performance characteristics are focused on accurate measurement of tiny pressure changes, and they are widely used in applications requiring high pressure sensitivity.Core features are as follows:
1. Targeted Measuring Range, Specialized for Low Pressure
Measuring ranges are mainly low-pressure scales such as 0~60kPa, -10~50kPa (combined vacuum and positive pressure).Minimum graduation can be as low as 0.1kPa or even 0.01kPa, which can accurately detect minor pressure fluctuations, including wind pressure of ventilation systems, furnace internal micro pressure, slight pressure changes in gas pipelines, etc.
Compared with conventional pressure gauges (mostly in MPa range), it avoids insufficient measurement accuracy in low-pressure sections caused by excessively large measuring ranges.
2. High Sensitivity & High Precision
Adopts sensitive elastic elements (diaphragms, bellows, capsule elements, etc.), instead of Bourdon tubes used in ordinary pressure gauges.These elements produce obvious deformation under tiny pressure, and drive the pointer through mechanical amplification transmission, ensuring sensitive response to low pressure.
High accuracy classes are available, commonly Class 1.0, Class 0.5 (error within ±1.0% / ±0.5% of full scale). Some precision models reach Class 0.25, meeting strict accuracy requirements for low-pressure measurement.
3. Structural Design Optimized for Micro Pressure Conditions
Overload resistance: Internal overload protection devices (such as limit stops) are installed to prevent sensitive elements from being damaged by accidental overpressure, due to the low measuring range.
Flexible connection: Adopts compact thread ports (R1/4, G1/4, R3/8, G3/8, etc.), suitable for thin pipelines and small equipment, with little pressure loss to the system during installation.
Clear dial display: Fine dial scales with optimized scale distribution for low pressure sections (denser scales within 0~10kPa range), easy to read tiny pressure values.
4. Wide Compatibility of Media & Environment
Media compatibility: Suitable for non-corrosive gases to copper and alloys (air, nitrogen, etc.) and low-viscosity liquids. Some stainless steel corrosion-resistant models can be used for slightly corrosive media.
Environmental adaptability: Stable operation under normal temperature and low vibration conditions. Partial models feature dustproof and moisture-proof design (IP54 protection class), suitable for HVAC, laboratory and environmental protection fields.
5. Typical Applications
HVAC & ventilation systems: Measure static pressure and dynamic pressure inside air ducts (e.g. ±5kPa)
Environmental protection & meteorology: Monitor flue micro pressure and slight atmospheric pressure changes
Laboratories: Low-pressure equipment calibration and internal pressure measurement of small containers
Food & pharmaceutical industry: Micro air pressure control of packaging equipment (e.g. pre-pressure stage of vacuum packaging)
Summary
The core advantages of kPa-level micro pressure gauges are high-precision and high-sensitivity measurement for low pressure.With targeted range design and sensitive element selection, they solve the problems of inaccurate measurement and unreadable indication of conventional pressure gauges in micro pressure sections, and are common instruments for low-pressure monitoring applications.
