Overview
Intrinsically safe (IS) scales are engineered to operate safely in volatile atmospheres by limiting electrical and thermal energy to levels below what is required to ignite flammable substances. They are critical in industries such as pharmaceuticals, petrochemicals, and grain handling, where standard scales pose explosion risks. IS scales undergo rigorous testing to meet international standards like ATEX (EU) and IECEx (global). These scales typically feature enclosed circuitry, non-sparking components, and low-voltage operation. Common designs include bench scales, floor scales, and portable units, often with stainless steel platforms for corrosion resistance. Certifications must align with the specific hazardous zone (e.g., Zone 0/1 for gases) defined by regional safety authorities.
Structure and Working Principle
An IS scale’s core components include a load cell, housing, and intrinsically safe circuitry. The load cell converts weight into an electrical signal, while the housing prevents internal sparks from escaping. Circuitry is designed to minimize energy storage, often using barriers or isolators to limit current and voltage. The working principle relies on maintaining energy levels below the ignition threshold of surrounding hazards. For example, batteries may be lithium-free or housed in sealed compartments. Displays are often LCD or LED with low power draw. Some models use pneumatic or hydraulic systems to eliminate electrical components entirely.
Key Features
Certification compliance is the foremost feature, with markings indicating approved hazard zones (e.g., ATEX II 1G for gas environments). Rugged construction materials like stainless steel (grade 304 or 316) resist corrosion and mechanical damage. Sealed interfaces (IP67 or higher) protect against dust and moisture ingress. Advanced models offer wireless data transmission with IS-approved radios or infrared links. Other features may include overload protection, tamper-proof calibration, and compatibility with hazardous area networks. Portability is prioritized in field applications, with lightweight designs and carry handles.
Application Areas
IS scales are indispensable in oil and gas facilities for weighing drill cuttings, chemicals, or samples in classified zones. Chemical plants use them for batch weighing of volatile raw materials. In mining, they weigh explosives or processed minerals where combustible dust is present. Pharmaceutical labs employ IS scales for solvent handling, while food processing plants utilize them in grain silos or alcohol production. Waste management sites deploy these scales to measure flammable recyclables. Each application requires matching the scale’s certification to the site’s hazard classification.
Maintenance and Precautions
Regular inspection for damage to cables, housings, or seals is critical. Calibration should be performed by certified technicians using IS-compliant tools. Avoid using non-approved accessories (e.g., printers) unless they are separately certified for the same zone. Battery compartments must remain sealed, and replacements should match OEM specifications. Cleaning should use non-abrasive methods to avoid compromising explosion-proof seals. Always de-energize the scale before servicing in non-hazardous areas.
B2B Procurement Guide
Buyers should first confirm the hazard zone classification (e.g., Zone 1, Division 1) with site safety officers. Prioritize suppliers with documented certification (e.g., ATEX Notified Body numbers). Request third-party test reports for verification. Compare load capacity, readability (e.g., 0.1g vs. 1kg), and communication options (RS-485, Bluetooth). Total cost of ownership includes calibration services and potential downtime from non-compliance. Lead times may be longer due to certification processes; plan procurement accordingly.
Related Manufacturers
- 主营：[]
- 主营：[]
- 主营：[]
- 主营：皮带秤、电子皮带秤、皮带计量秤、输送机计量秤、高精度皮带秤、阵列式皮带秤、高精度电子皮带秤、皮带秤厂家、计量皮带秤、输送带计量秤、洗煤厂皮带秤、输煤皮带秤、煤炭皮带秤、防爆皮带秤、矿用皮带秤、井下电子皮带秤、矿用防爆皮带秤、矿用电子皮带秤、港口皮带秤、煤矿皮带秤、高精度螺旋秤、螺旋秤、ics皮带称、皮带自动采样机、皮带采样机
- 主营：[]
- 主营：[]
- 主营：配料机、防爆地磅、汽车衡、皮带秤、包装秤、手提秤、称重配料控制系统、配料控制器、小地磅、无人值守地磅、包装机
- 主营：矿用设备、铁路设备、救援设备、兼本安型电子皮带秤、防爆电器、仪器仪表、路面机械、工程机械、智能制造
- 主营：电子地磅、电子汽车衡、缓冲地磅、电子台秤、称重模块、称重变送器、智慧称重系统、无人值守称重系统、系统称重软件、称重仪表、称重传感器
- 主营：电子地磅、电子称台、重量变送器、打印秤、小型磅秤、电子台秤、计重电子秤、精密电子秤、电子天平秤、防水电子计数秤、配料秤、皮带检重秤、失重秤、电子天平称、高精度称重模块、称重传感器、测力传感器、扭矩传感器、称重模块、波纹管传感器、无人智能称重货架、金属检测机、喂料机、应变片称重传感器、轮式称重传感器
- 主营：不锈钢砝码、铸铁砝码、钢包砝码、防水秤、防爆秤、液化气罐装秤、滚筒秤、自动检重秤、叉车秤、钢瓶秤、电子吊秤、电子台秤、单钩砝码、双钩砝码、配重砝码、增坨砝码、电梯砝码、镀铬砝码、电子地磅、不锈钢地磅、汽车衡、电子天平、称重模块、无人值守称重系统、地磅自助过磅系统
- 主营：单体液压支柱、气动葫芦、无压风门、防水密闭门、防火栅栏门、避难硐室门、金属顶梁、扒渣机、托辊、刮板机整机、刮板、单开道岔、阀柱试验台、拆柱机、跑车防护装置、耙斗装岩机、矿车、风机、电机车、电子围栏、临时支护装置、U型钢支架、耙矿绞车、矿灯充电柜
- 主营：测试仪、放大器、齿轮泵、秤量瓶、排气泵、铁质仪、摄像机、管道工、野测器、防尘帽、安全盖、端子台、涂层剂、塑料锤、防潮箱、电工刀、通信块、电磁阀、压电泵、熔锡炉、联轴器、起钉器、报警器、微型泵、切割机
- 主营：轮椅秤、透析电子秤、轮椅体重秤、防爆电子秤、不锈钢电子秤、300kg轮椅体重秤、防爆地磅、称重模块
- 主营：防爆电子叉车秤、吊钩电子称
- 主营：矿用设备、铁路设备、救援装备、本安型防爆电子秤、防爆电器、路面机械、工程机械
- 主营：无压风门、防水密闭门、防火栅栏门、皮带计量秤、瓦斯稀释器、洗靴机、孔板流量计、防回火装置、瞬变电磁仪、井下电视、振动放矿机、矿用摄像仪、音视频记录仪、矿用平板车、固定式矿车、翻斗式矿车、气动绞车、调度绞车、启闭风门绞车
- 主营：电子叉车秤、不锈钢电子秤、透析轮椅体重秤、电子称、电子地磅、电子吊称
- 主营：防爆钢瓶秤、汽车称重仪、电子汽车衡
- 主营：电子天平、防爆天平、防爆地磅、电子台秤、防水台秤、防爆台秤、智能台秤、高精度台秤、防水案秤、电子桌秤、智能案秤、防爆叉车秤、防爆吊秤、电子叉车秤、直显吊秤、无线吊秤、智能收货秤、检重秤、打印台秤、防爆仪表、电子地磅、称重模块、称重仪表、防水地磅、砝码
- 主营：带打印、物联网、汽车衡、地磅秤、电子秤、电子磅秤、小地磅、电子称、传感器、地磅可、60吨地磅、防水地磅、衡器地磅、维特沃斯、地磅维特、移动衡器、防爆电子、出口地磅、地磅管理、管理系统、防腐衡器、沃斯智能、地磅物联、称重控制、防爆地磅