在工业自动化的精密赛道上，差压测量是流量、液位、压力等关键参数的 “感知神经”。实时捕捉压力差的细微变化，为生产决策提供关键数据。GRAEFF（格拉夫）差压测量系列凭借领先技术与极致可靠性，成为各行业过程控制的 “硬核担当”，为工业生产的精准度与安全性保驾护航。

On the precise track of industrial automation, differential pressure measurement serves as the "sensory nerve" for key parameters such as flow rate, liquid level, and pressure. Capture the subtle changes of pressure differences in real time to provide key data for production decisions. The GRAEFF differential pressure measurement series, with its leading technology and ultimate reliability, has become the "hardcore leader" in process control across various industries, safeguarding the accuracy and safety of industrial production.

一、产品简介/Product Introduction

GRAEFF（格拉夫）  格拉夫差压测量系列的核心 ——G 系列差压变送器，是工业测量的 “精密利器”：

核心技术：采用全球领先的单晶硅压力传感器技术与封装工艺，搭配性能强大的 24 位 ADC，实现高精度信号转换；创新双补偿技术，进一步确保测量的真高精准度。

性能优势：抗干扰性强、稳定性突出，稳定性可达±0.1%/3 年，长期运行仍能保持精准表现。

适用场景：测量介质覆盖气体、蒸汽、液体，电源适配 10~36VDC（推荐 24VDC），环境温度 - 40℃~85℃、介质温度 - 40℃~120℃的宽域适应，即便严苛工况也能稳定工作。

智能交互：支持 HART 协议通讯，可远程操作与参数配置，适配工业智能化升级需求。

可视化与定制化：配备 LCD/OLED 显示，支持压力测量量程（1~6KPa 至 400~4000KPa）、法兰 / 膜片材质（304/316 不锈钢、耐腐合金等）、安装尺寸等多维度定制。

The core of GRAEFF's differential pressure measurement series - the G series differential pressure transmitter - is a "precision tool" in industrial measurement:

Core technology: Utilizing the world-leading single-crystal silicon pressure sensor technology and packaging process, combined with a powerful 24-bit ADC, it achieves high-precision signal conversion. Innovative dual compensation technology further ensures the true high accuracy of measurement.

Performance advantages: Strong anti-interference ability and outstanding stability, with stability reaching ±0.1% for 3 years. It can maintain precise performance even after long-term operation.

Applicable scenarios: The measured medium covers gas, steam and liquid. The power supply is compatible with 10~36VDC (24VDC is recommended). It has a wide range of adaptability for ambient temperature -40 ℃ to 85℃ and medium temperature -40 ℃ to 120℃. It can work stably even under harsh working conditions.

Intelligent interaction: Supports HART protocol communication, allowing for remote operation and parameter configuration, meeting the demands of industrial intelligent upgrades.

Visualization and Customization: Equipped with LCD/OLED display, it supports multi-dimensional customization such as pressure measurement range (1~6KPa to 400~4000 kpa), flange/diaphragm material (304/316 stainless steel, corrosion-resistant alloy, etc.), and installation dimensions.

二、应用领域/Application field

差压测量是工业生产的 “数据眼睛”，GRAEFF（格拉夫）差压测量系列产品在各行业深度渗透，成为设备与工艺的 “健康监测仪”。

Differential pressure measurement is the "data eye" of industrial production. GRAEFF's differential pressure measurement series products have deeply permeated various industries and have become the "health monitor" of equipment and processes.

化工行业/Chemical industry

在化工合成、流体输送、设备运维等工艺中，精准监测反应釜、管道、换热器的差压变化，为工艺参数调控、设备故障预警提供数据支持，保障生产安全与产品品质。像化工反应釜，依靠它对内部压力差的实时捕捉，能精准控制反应速率，提升产物纯度；换热器通过其监测的进出口差压，可及时判断结垢情况，避免换热效率下降。

In processes such as chemical synthesis, fluid transportation, and equipment operation and maintenance, precise monitoring of differential pressure changes in reaction vessels, pipelines, and heat exchangers provides data support for process parameter regulation and equipment failure early warning, ensuring production safety and product quality. Like chemical reaction vessels, by relying on their real-time capture of internal pressure differences, they can precisely control the reaction rate and enhance the purity of the products. The heat exchanger can promptly determine the fouling situation by monitoring the differential pressure between the inlet and outlet, thus avoiding a decline in heat exchange efficiency.

石油天然气行业/The oil and gas industry

在原油开采、炼化加工、管道运输全流程中，精准检测油井、反应器、长输管道的差压数据，为产能判断、压力平衡、泄漏预警提供核心依据，保障全链条高效安全运行。如长输油气管道，依靠它对管内差压的动态监测，能快速识别泄漏隐患，降低运输风险；油井通过其监测的压力差，可精准判断油层产能与井下安全状态。

Throughout the entire process of crude oil extraction, refining and processing, and pipeline transportation, the differential pressure data of oil Wells, reactors, and long-distance pipelines are accurately detected to provide core basis for capacity judgment, pressure balance, and leakage early warning, ensuring the efficient and safe operation of the entire chain. For instance, in long-distance oil and gas pipelines, by relying on its dynamic monitoring of the differential pressure inside the pipe, leakage hazards can be quickly identified and transportation risks can be reduced. The oil well can accurately determine the production capacity of the oil layer and the safety status underground through the pressure difference it monitors.

电力行业/Electric power industry

在火电、核电、水电的能源转化过程中，精准测量锅炉蒸汽、冷却系统、水库的差压变化，为燃烧优化、设备防护、调度决策提供数据支撑，提升能源利用效率与运行安全性。像火电锅炉，依靠它对蒸汽差压的实时监测，能精准计算蒸汽流量，优化燃烧效率；核电冷却系统通过其监测的差压数据，可保障反应堆热交换稳定，守护核电安全。

In the energy conversion process of thermal power, nuclear power and hydropower, accurately measuring the differential pressure changes of boiler steam, cooling systems and reservoirs provides data support for combustion optimization, equipment protection and dispatching decision-making, and improves energy utilization efficiency and operational safety. Like thermal power boilers, by relying on its real-time monitoring of steam differential pressure, it can accurately calculate steam flow and optimize combustion efficiency. The nuclear power cooling system can ensure the stability of heat exchange in the reactor and safeguard the safety of nuclear power through the differential pressure data it monitors.

冶金行业/Metallurgical industry

在冶炼、冷却、除尘等工艺环节，精准监测高炉、转炉、除尘管道的差压变化，为冶炼气氛调控、设备冷却保障、环保达标提供支持，助力工艺精益化与设备长效运行。如高炉冶炼，依靠它对炉内气体差压的监测，能优化冶炼条件，提升金属收得率；除尘设备通过其捕捉的管道差压，可及时判断滤袋堵塞程度，确保除尘效果。

In the process links such as smelting, cooling and dust removal, the differential pressure changes of blast furnaces, converters and dust removal pipelines are precisely monitored to provide support for the regulation of smelting atmosphere, equipment cooling guarantee and environmental protection compliance, and to facilitate the lean process and long-term operation of equipment. For instance, in blast furnace smelting, by relying on its monitoring of the differential pressure of the gas inside the furnace, the smelting conditions can be optimized and the metal yield can be increased. The dust removal equipment can promptly determine the degree of filter bag blockage through the differential pressure of the pipeline it captures, ensuring the dust removal effect.

制药 & 食品饮料行业/Pharmaceutical & food and beverage industry

在无菌生产、发酵加工、配料灌装等场景中，精准控制发酵罐、灌装设备、输送管道的差压，为剂量精度、产品一致性、卫生安全提供保障，契合行业严苛标准。像生物制药的发酵罐，依靠它对内部压力差的监测，能优化菌群生长环境，提升药品活性；饮料灌装线通过其调控的差压数据，可确保每瓶产品的灌装量精准一致。

In scenarios such as aseptic production, fermentation processing, and ingredient filling, precisely controlling the differential pressure of fermentation tanks, filling equipment, and conveying pipelines provides guarantees for dosage accuracy, product consistency, and hygiene and safety, meeting the strict industry standards. Just like the fermentation tanks in biopharmaceuticals, by monitoring the internal pressure difference, the growth environment of the bacterial community can be optimized and the activity of the drugs can be enhanced. The beverage filling line can ensure that the filling volume of each bottle of product is precise and consistent through the differential pressure data it regulates.

市政 & 环保行业/Municipal & environmental protection industry

在供水调度、污水处理、废气治理等场景中，精准监测供水管网、污水池、环保设备的差压变化，为流量调控、处理效率优化、合规排放提供数据支持，助力市政运维智能化与环保达标。如城市供水管网，依靠它对管道差压的监测，能掌握流量分布，优化供水调度；污水过滤系统通过其监测的差压，可及时判断滤料堵塞情况，保障处理效率。

In scenarios such as water supply dispatching, sewage treatment, and waste gas control, precise monitoring of differential pressure changes in water supply networks, sewage ponds, and environmental protection equipment provides data support for flow regulation, optimization of treatment efficiency, and compliance with emission standards, facilitating intelligent municipal operation and maintenance and achieving environmental protection compliance. For instance, in urban water supply networks, by monitoring the differential pressure of pipelines through it, the flow distribution can be grasped and the water supply dispatching can be optimized. The sewage filtration system can promptly determine the clogging of the filter material through the differential pressure it monitors, ensuring the treatment efficiency.

航空航天 & 汽车行业/Aerospace & automotive industry

在装备制造与运行过程中，精准检测燃油箱、液压系统、发动机的差压变化，为液位判断、动力调控、排放合规提供数据支撑，保障装备性能与运行安全。像飞机燃油箱，依靠它对液位差压的间接测量，能精准反馈燃油储量，保障飞行安全；汽车发动机通过其监测的进气歧管差压，可优化燃油喷射，提升动力与燃油经济性。

During the manufacturing and operation of equipment, precise detection of the differential pressure changes in fuel tanks, hydraulic systems, and engines provides data support for liquid level judgment, power regulation, and emission compliance, ensuring the performance of equipment and operational safety. Just like the fuel tank of an aircraft, by indirectly measuring the differential pressure of the liquid level, it can accurately feedback the fuel reserve and ensure flight safety. The car engine can optimize fuel injection and enhance power and fuel economy through the intake manifold differential pressure it monitors.

三、总结/Summary

作为工业自动化领域的 “感知神经” 与 “硬核担当”，GRAEFF（格拉夫）差压测量系列凭借高精度、强稳定、抗严苛工况的核心优势，搭配智能交互与多维度定制能力，成为跨行业的精密测量标杆。助力企业实现高效运维、节能降耗与合规生产，全方位守护工业生产的精准度与可靠性。

As the "sensory nerve" and "hardcore leader" in the field of industrial automation, GRAEFF's differential pressure measurement series, with its core advantages of high precision, strong stability, and resistance to harsh working conditions, combined with intelligent interaction and multi-dimensional customization capabilities, has become a benchmark for precision measurement across industries. Help enterprises achieve efficient operation and maintenance, energy conservation and consumption reduction, as well as compliant production, and comprehensively safeguard the accuracy and reliability of industrial production.