深圳市乐欣电子科技有限公司（百安途）主要做哪些产品？

乐欣电子科技（百安途）主营声级计、风速计、光照计、木材水份仪、电池检测仪、内阻仪，以及可燃气体检测仪、一氧化碳检测仪、甲醛检测仪等检测仪器仪表。

声级计的 A 计权和 C 计权有什么区别，应该怎么选？

A 计权（dBA）对低频衰减较大，接近人耳感知特性，是环境噪声与职业噪声评价的通用计权方式；C 计权（dBC）对低频衰减小，适合机械噪声、冲压设备等低频成分丰富的声源。ET-958、ET-953 支持 A/C 计权一键切换，符合 IEC 61672-1 2 级标准，分辨率 0.1 dB。

热式风速仪和叶轮式风速仪怎么选？

热式风速仪可检测 0.05~0.3 m/s 微弱气流，分辨率 0.01 m/s，适合洁净室、通风管道与室内空气质量评估；叶轮式结构耐用，测量范围 0.4~35 m/s，适合户外风速、风机性能与暖通出风口检测。ET-975P、ET-975 为热式方案，ET-95 为叶轮方案并内置温度补偿。

四合一气体检测仪检测哪四种气体？报警阈值怎么设置？

标准四合一检测可燃气体（LEL）、氧气（O₂）、一氧化碳（CO）、硫化氢（H₂S）。常用阈值：可燃气低报 10% LEL、高报 25% LEL；氧气缺氧 19.5% VOL、富氧 23.5% VOL；一氧化碳 25/50 ppm；硫化氢 10/15 ppm。GD-100 支持多级报警阈值设置、声光振动三重报警、IP65 防护、续航 12 小时。

针式、感应式、球型木材水分仪有什么区别？

针式（电阻式）精度高（±1%）但会留下针孔，适合原材料入库检验，MT-850 测量范围 2%~40%；感应式为无损检测，适合成品家具与地板抽检，ET-971 测量范围 3%~35%；球型探头接触面积大、读数稳定，MT-98 木材测量范围 5%~75%，建筑材料 0.1%~2.4%。室内家具用材含水率建议控制在 8%~12%。

蓄电池内阻增大到多少需要更换？

判断依据是与电池自身基准值对比：内阻升到出厂基准值 1.5 倍时应重点关注，达到 2 倍时容量通常已降至 80% 以下，建议更换；组内某节偏离平均值 50% 以上也应重点监控。BT-100 采用四线（开尔文）交流注入法，内阻量程 0.01 mΩ~3000 mΩ，电压 0~600 V，可存储 10000 组数据。

产品是否支持定制？

支持定制。可根据客户需求提供量程精度调整、功能拓展、外观标识、界面语言与报警阈值等 OEM/ODM 定制服务。

是否可以提供样品？

可以提供样品，欢迎联系我们了解详情。

产品的起订量是多少？

起订量根据具体产品而定，欢迎咨询获取详细信息。

产品是否有质检报告或相关认证？

有符合各项产品的证书，可提供出厂校准报告，也可协助代送第三方计量机构出具 CNAS 校准证书。

Return Case ListAnemometer Series

Commercial Building Ventilation System Air Velocity Detection

Use the ET-975P anemometer to measure air velocity and volume in the HVAC system of a commercial complex, ensuring ventilation performance meets standards.

Customer

Commercial Complex Property Management

Location

Shenzhen, Guangdong

Cycle

2024 6 – 2024 7

Use Product

ET-975P Anemometer

Wind speed detection for commercial building ventilation systems

Project Background

After operation, commercial HVAC systems may develop issues such as insufficient airflow and uneven temperatures in certain zones. Duct air velocity and volume testing are required to identify the root cause.

Facing Challenges

Complex duct systems with numerous inspection points.
Some vent locations are difficult to access.
Must be detected during business hours.
Compare data against design requirements

Solutions

Measure air velocity at supply and return grilles using ET-975P, export data via USB Type-C for comparative analysis, identify insufficient damper openings, and adjust accordingly.

Use product

ET-975P AnemometerAirflow measurement hoodData Export Software

Project Outcomes

180+

Detect number of air vents

25%

Improved ventilation efficiency

15%

Reduced energy consumption

±1°C

Temperature Uniformity

* Data above sourced from the project acceptance report and archived after customer confirmation.

Related Cases

Anemometer Series

Industrial Building Ventilation and Exhaust Testing

Conduct a comprehensive inspection of the exhaust system in an electronic manufacturing facility using the ET-975 anemometer to evaluate ventilation effectiveness and ensure air quality in the production environment.

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