Wireless Round-the-Clock Observation of Coal Stacks, No Matter where Measurement Points May Move


One important risk to manage with regard to coal stacks is preventing fires due to spontaneous combustion. Generally, coal stacks are located in expansive areas where the wind blows unobstructed, posing a constant risk of spontaneous combustion. Even the best contingency plans by independent fire-fighting teams are unable to address the cause of the problem. And once fires start, if they aren't extinguished quickly they can spread rapidly and result in overwhelming damage to the company. Many companies set up regular patrols by engineers as a fire prevention measure. However, measuring coal stack temperatures can be dangerous, and it takes a lot of time and effort to cover the extensive areas involved. By using Yokogawa Electric's "Plant-wide field wireless," you can safely acquire temperature data any time from any point in a vast coal stack as a fire prevention solution.

What is Plant-Wide Field Wireless?

Plant-Wide Field Wireless is a wireless system that employs the international ISA100 Wireless (IEC62734) industrial standard, giving it the reliability demanded of industrial wireless communication and real-time functionality. It utilizes a redundant "Duocast" technology that communicates with two Access Points simultaneously to maintain connection when a communication channel or Access Point fails. It is highly scalable, supports a variety of interfaces for connecting to the Access Points and upstream systems including Ethernet, wireless LAN, and optical Ethernet, and is flexible during structural changes, making it ideal for building large scale wireless networks.

Customer Benefits

  • Covers up to 500 Locations from up to 2 km
  • Safe and Efficient Monitoring at a Lower Cost
  • Low Entry Cost, and Delivery in as short as One Day

Solution and Benefits

Covers up to 500 Locations from up to 2 km

Portable thermocouples of approximately 2 m in length are embedded at measuring points on the coal mounds where ignition is most likely to occur. By connecting these to YTA510 Wireless Temperature Transmitters, temperature data from 2 meters in depth can be transmitted wirelessly. Because it's a wireless system, it easily conforms to changes in the shape of the coal stack. It has a maximum range of 500 m, and covers up to 500 measuring points. By installing repeaters, you can monitor from a control room that is up to 2 km away. This scale of regular fixed-point observation would not be realistic with wired solutions.

Safe and Efficient Monitoring at a Lower Cost

Unmanned operation means that engineers are freed up from dangerous coal stack temperature measurement work. Further, the transmitters are battery powered (lasting up to 10 years depending on operating conditions), and require almost no maintenance. You can expect to lower your costs because you can reduce the time and labor involved in surveying immense coal stacks.

Low Entry Cost, and Delivery in as Short as One Day

Wired solutions require installation with cabling, which costs time and money. But wireless is relatively inexpensive because you simply install a device at each measurement and relay point. Installing the system can take as little as a day, saving even more time.

Coal stack temperature monitoring

YOKOGAWA Solutions Meet even More Needs

We carry a broad lineup of wireless field devices. For the YT510 Wireless Temperature Transmitter, in addition to the 2-input model, we also carry the YTMX580 Multi-Input Temperature Transmitter that accepts up to 8 inputs per unit. With Yokogawa Electric solutions, you can connect to a variety of upstream systems, from small- to large-scale.


  • 鋼鐵




  • YFGW410現場無線管理站


  • YFGW510/YFGW520現場無線接入點


  • YFGW520 Field Wireless Access Point

    YFGW520 Field Wireless Access Poin has backbone router function based on ISA, and combining this with Field Wireless Management Station (YFGW410) and/or Field Wireless Media Converter (YFGW610) composes the field wireless system.

  • YTA510無線溫度變送器

    高性能溫度變送器YTA510接收熱電偶、RTD、歐姆或DC mV輸入訊號。該變送器通製無線訊號傳輸製程變量以及設定參數。該變送器採用內定電池,由於無需硬接線,因此可降低安裝成本。通訊規格以ISA100.11a協議為基礎。

  • YTMX580多點輸入溫度變送器

    YTMX580最多可接收8點測量輸入值,如熱電偶(8種類型:K、E、J等)或RTD訊號(3種類型:Pt100等),並將相應的測量輸入值轉換為無線訊號。它也可以接收DC電壓、電阻和4~20 mA DC訊號輸入。

  • 現場無線


  • 面板式記錄器

    面板安裝記錄器完全整合資料收集和顯示,具有安全的內建資料儲存和網絡連接。 面板安裝解決方案符合NEMA標準,並將資料收集設備整合到控制面板。


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