Article Vesda High Sensitivity Smoke Detector

ปรกติแล้วก่อนเกิดไหม้ (Fire) ลุกลามจะเกิดควันไฟ (Smoke) ขึ้นก่อน เพราะว่าเมื่อเกิดประกายไฟ (Spark) ขึ้นที่เชื้อเพลิง ปัจจัยแห่งการเกิดเพลิง (ส่วนผสมของปริมาณออกซิเจน เชื้อเพลิง และอุณหภูมิ) ยังไม่เหมาะสม การสันดาบจึงยังไม่สมบูรณ์ (In complete combustion) เกิดควันไฟ (แก๊ซ คาร์บอนไดออกไซด์ และแก๊ซคาร์บอนโมโนออกไซด์) การสันดาบที่ไม่สมบูรณ์นี้จะใช้ระยะเวลาหนึ่ง จนเกิดอุหณภูมิของเปลวไฟจะสูงพอที่จะทำให้เพลิงเกิดลุกลามต่อเนื่องใด้

Vesda ใช้หลักการอันนี้ คิอดูดอากาศ (Sucking, Aspirating) ภายในห้องที่มีควันไฟปนมา เข้าสู่เครื่องมือวัดปริมาณควันไฟ (Smoke detector) ก่อนการเกิดเพลิงไหม้จริง แล้วส่งสัญญาณแจ้งเตือน (Fire detector) ไปยังอุปกรณ์แจ้งเตือนการเกิดเพลิงไหม้ (Fire alarm control panel) ให้ทำการอพยพผู้คน และทำการดับไฟ เป็นการแจ้งเตือนได้เร็วกว่าระบบแจ้งเตือนชนิดอื่นๆ สามารถที่จะดับไฟได้ก่อนความเสียหายจะเกิดชึ้น

จุดดูดอากาศจะวางใว้ตามจุดต่างๆภายในห้อง เพื่อดูดอากาศ (Aspirating blower) อย่างต่อเนื่อง (Continuous) มายังอุปกรณ์การวัด

Vesda ต่างกับเครื่องดักจับควันไฟชนิดอื่นๆ คือการรับรู้ตั้งแต่ต้นการเกิดเพลิงใหม้ (Proactive) ส่วนแบบอื่นๆจะรู้เมื่อเกิดเพลิงไหม้มากแล้ว (Reactive) การป้องกันเพลิงไหม้จึงทำใด้แต่เนิ่นๆ ก่อนที่ไฟจะลุกลาม

เป็นชื่อทีใช้เรียกทั่วไปของอุปกรณ์ ASD (Aspirating Smoke Detection Device) Vesda เป็นชื่อภายใต้ลิขสิทธ์ของบริษัท Xtralis ซี่งเป็นผู้ผลิต ASD ชั้นนำของโลก

Vesda เป็นแบรนด์ ASD จากประเทศออสเตรเลีย เป็นผู้นำด้านอุปกรณ์ตรวจจับควัน ที่สามารถตรวจจับควันได้ก่อนล่วงหน้า ตั้งแต่ระยะะที่เรายังมองไม่เห็นควันด้วยตาเปล่า เป็นเครื่องดักจับควันไฟที่มีความใวในการจับสูง (High sensitivity devices) สามารถตรวจสอบและระงับเหตุของเพลิงไหม้ได้ทันก่อนจะลุกลามใหญ่โตจนยากแก่การควบคุม

ระบบ Vesda จะเป็นระบบตรวจจับควันแบบสุ่ม (Random sampling) โดยการเดินท่อสุ่มตัวอย่างอากาศ (ASD - Aspirating Smoke Detector) ดูดอากาศจากสภาพแวดล้อมมาประมวลผล ผลิตภัณฑ์ Vesda ได้มีการพัฒนาอย่างต่อเนื่องจนมาถึงรุ่นปัจจุบัน VEASDA E มีความไวเพิ่มขึ้นถึง 15 เท่า ตอบสนองได้รวดเร็ว ลดสัญญาณ (Noise) รบกวน สามารถตรวจจับแยกอนุภาคฝุ่นควัน (Smoke dust) และควันจากสายไฟที่ไหม้ แม้กระทั่งอนุภาคในเขม่าควันจากเครื่องยนต์ดีเซล Vesda สามารถเชื่อมต่อกับระบบควบคุมการระบายอากาศได้ตามต้องการ นอกจากนี้ Vesda ยังมีฟังค์ชั่นเชื่อมต่อที่หลากหลาย เช่น Ethernet, WIFI, VESDAnet และ USB สามารถระบุตำแหน่ง (Addressable) ได้ถึง 120 จุด ทำให้ประหยัดค่าใช้จ่าย และสามารถตอบโจทย์ความต้องการใช้งานที่หลากหลาย

ชนิดของเครื่องดักจับควันไฟ มี 3 เทคโนโลยี่หลัก คือ

Ionization
Photoelectric
Combination of the two which is commonly called a “dual” detector.

แต่ Vesda เป็นเลเซอร์เทคโนโลยี่

VESDA detectors have multi-level warnings and a wide range of sensitivity that does not degrade or change over time, so even minute levels of smoke can be detected before a fire has time to escalate.

In addition, VESDA HSSD (High Sensitivity Smoke Detection) systems are manufactured using targeted Six Sigma techniques and ISO 9000 standards and have been certified by regulatory bodies worldwide.

กระบวนการวัดของ Vesda คือ ดูด ->กรอง-> วัด-> แจ้งเตือน

1. The first stage removes dust and dirt from the air sample before it allows the sample to enter the laser detection chamber for smoke detection.

2 The second (ultra-fine) stage has the unique feature of providing an additional clean air supply to keep the optical surfaces within the detector clear from contamination and to ensure the stable calibration and long life of the detector.

ประโยชน์ของ Vesda

Very early smoke detection to mitigate risk of catastrophic loss and business disruption
Absolute calibration for superior smoke detector performance without compromise
Reliable, continuous and highly sensitive operation where traditional smoke detection fails
Full integrity monitoring of all critical smoke detector functions to ensure the detector is able to detect smoke, unlike conventional smoke detectors
Tolerance of harsh and dirty environments
Event management tools for intelligent emergency response
The industry’s lowest total cost of ownership

From the filter, the air sample is passed through to the calibrated detection chamber where it is exposed to a stable controlled laser light source. When smoke is present, light is scattered within the detection chamber and is instantly identified by the highly sensitive receiver system. The signal is then processed and presented via a bar graph display, alarm threshold indicators and/or graphic display. The detectors are able to communicate this information to a fire alarm control panel, a software management system or a building management system via relays or a High Level Interface (HLI).

VESDA system actively draws air into its sampling holes which increases the chance of smoke being detected. Passive smoke detectors rely on smoke reaching them via diffusion or using the thermal energy of the fire.

บริษัทไอดีล มีวิศกรที่มีความรู้ ทักษะ และประสบการณ์ ที่จะให้บริการอย่างครบวงจร (Total solutions service) ได้แก่การออกแบบ เลือกอุปกรณ์ ติดตั้ง ทดสอบระบบ บำรุงรักษา ตรวจสอบแก้ปัญหา (Trouble shooting) และปรับปรุงระบบใหม่ (Modify and upgrade) ของระบบป้องกันอัคคีภัย การทำงานจะทำตามมาตรฐาน (Code and standard) ด้านความปลอดภัยที่ทั่วโลกให้การยอมรับ (NFPA, OSHA, ASME, ANSI,…เป็นต้น) และตามความต้องการของผู้ใช้งาน

บริษัทไอดีล เป็นตัวแทนจำหน่ายสินค้าโดยตรง และพันธมิตรทางการค้ากับแบรนด์ที่มีชื่อเสียงระดับโลก คุณภาพและความชื่อถือได้ มีใช้งานกันอยู่อย่างแพร่หลายทั่วโลก เช่นแบรนด์ Honeywell, Bosch, Notifier, Kidde, Johnson Control, Siemens, Vesda, Tyco, Shilla Fire, Raphael, …etc. การเลือกใช้จะสอดคล้องกับคุณสมบัติที่ให้ลูกค้าต้องการ

บริษัทไอดีลได้รับการสนับสนุนด้านเทคนิคจากบริษัทผู้ผลิตเป็นอย่างดี จึงสามารถรับประกันได้ว่าจะสร้างความประทับใจในการบริการให้กับลูกค้า

สนใจสินค้าและระบบ ต้องการที่ปรึกษา ติดต่อ บ. ไอดีล ควอลิตี้ โซลูชั่นส์ จำกัด

ความเร็วของการวัดของ VESDA-E VEP
VEP sensitivity range is from 0.005-20%/m (0.0016-6.25%/ft) and provides up to 40 Class A holes.

Underground Utility Tunnels
Unlike conventional smoke and gas detectors that become easily contaminated due to airborne dust, VESDA ECO overcomes harsh environmental conditions to provide reliable detection of methane (CH4) and carbon monoxide (CO) or other hazardous gases.

The VESDA Aspirated Smoke Detectors have been designed for an average life expectancy of ten (10) years in a Ground Benign environment.

Normal Ceiling Height – 12 m (39 ft) or less. High Ceiling – Greater than 12 m (39 ft) but less than or equal to 30 m (98 ft).

The VESDA detector can accommodate a wide range of sampled air temperatures (-20°C (-4°F) to 60°C (140°F)) making it an ideal fire detection solution for a wide range of industrial applications.

The complete system includes all of the components necessary to install and test the system. This includes: pipe, a comprehensive range of fittings, capillary tube, a variety of sample point configurations, and sampling point labels.

Properly installed and maintained smoke alarms are considered to be one of the best and least expensive means of providing an early warning of a potentially deadly fire and could reduce by almost half the risk of dying from a fire in your home.

ESDA VLI Aspirating Smoke Detection

It's IP66 rated enclosure is impervious to dust (and water) and its conformal coated electronics offer increased protection from harsh environments that may contain moisture, dust or chemical contaminants.

The power supply to the VESDA Laser System should be checked every month, or as required by local codes and standards. VESDA Laser Products are designed to operate between 24 VDC and 30 VDC. We recommend at least checking the supply voltage, output voltage, battery state and the correct operation of the fault relays.

There are generally two types of smoke alarms - ionization smoke alarms and photoelectric smoke alarms. All fires produce smoke particles in varying number and size. Ionization smoke alarms are generally more sensitive than photoelectric smoke alarms at sensing small smoke particles.

Here's the thing: Photocell sensors have a lifespan of upwards of 10 years. They do go bad from time to time, though, especially if they aren't connected to stable wiring. In such cases, the best way to fix a bad photocell is to simply replace it.

VESDA-E VEU Aspirating Smoke Detector (Highest Sensitivity ASD)

VESDA-E Accessories

The new VESDA-E range exceeds previous VESDA detectors with many enhanced features, including dramatically increased sensitivity – up to 15 times greater than previous models; flexibility for deployment in a wide variety of applications; multi-port addressability; unparalleled connectivity & expansion options; and, field upgradability. All these features combine to make VESDA-E the best choice for early warning of smoke and fire threats. VESDA-E's sensitivity, flexibility, reliability, programmability, and expandability provides customers with superior performance and protection, while lowering the total cost of ownership (TCO).

PROTECT YOUR INVESTMENT

With up to 40% greater coverage in high airflow environments, the VESDA-E range of aspirating smoke detectors represent considerable CAPEX savings. Easier servicing and a field replaceable architecture further reduce system OPEX. And of course, VESDA-E is completely compatible with existing VESDA systems.

VESDA SMOKE+

VESDA Smoke+ capitalizes on the patented Flair Detection Technology centered in the VESDA-E detection chamber used in VEU and VEP. The Flair Detection Technology offers increased sensitivity – up to 15 times greater than VESDA VLP, at least 3X better dust rejection, up to twice the longevity while maintaining consistent sensitivity over time.

The Smoke+ capability focuses on improving key aspects related to smoke detection including:

Detection Performance with vastly better sensitivity and faster response time
Detection Reliability for operating temperature stability, while minimizing nuisance alarms
Consistent Performance Over Time , even during long term exposure to dust
Efficiency of Operation with lower power consumption per unit area

VESDA-E improves CapEx value through higher sensitivity and longer pipe runs resulting in greater coverage area for VEU and VEP detectors and through flexible microbore tube network for VEA. It also reduces OpEx costs due to accessible and centralised maintenance, field replaceable components and full system integrity monitoring for VEA.

Plug and play features improve the installation experience and reduce its cost via:

AutoConfig capability
Firmware upgrade using only a USB key
Instant monitoring via Wi-Fi
Mounting template & Mounting bracket
Ample wiring space
Design-less pipe networks for simple designs for VEU and VEP
Flexible VEA installation with pre-engineered microbore tubes and push-fit connections

VESDA-E can also provide vast monitoring options including:

VSM4
VESDAnet
iVESDA Mobile Application (Android & IOS)
Remotes

For current VESDA users, VESDA-E offers backward compatibility with the relevant VESDA product line – with VESDA-E you can reduce Total Cost of Ownership by up to 15% for VEU and VEP and up to 60% for VEA.

The Fastest Response

What sets a VESDA apart from other fire detection systems is its sensitivity to even the smallest smoke particles. A VESDA system allows the fastest possible response to a potential fire condition because it is constantly sampling the air by using a vacuum to actively “suck” air into tubing where it is analyzed by a laser. It will send out an alert as soon as the smallest amount of smoke is detected, far faster than standard spot-type smoke detectors. If an immediate response is the goal, it might be worth it to install a VESDA system.

Protection for the Priceless

Museums, historic facilities, and art galleries are great applications for a VESDA system. When dealing with centuries-old priceless artwork and artifacts, it is preferable to proactively manage a potential fire hazard before it becomes a fire that could damage any of the exhibits. VESDA doesn’t just protect priceless artifacts, it’s also a superior life safety system. Preventing a fire is the best possible result when protecting both property and people, and a VESDA system makes this easier by detecting smoke immediately.

More Space, Less Cost

Other excellent applications for VESDA systems include data centers, clean rooms, telecommunications facilities, control rooms, and other mission-critical facilities. For large, open auditoriums and similar buildings, a VESDA system requires fewer units than standard smoke detectors to be effective, which will save money while offering a high level of protection. VESDA systems are advantageous for other reasons, too. They are easier to maintain than standard spot-type smoke detectors and are far less noticeable than other smoke detectors, an important consideration for period architecture often found in historic facilities.

VESDA ^® application

Simply, VESDA ^® can be installed anywhere that a conventional smoke detector system can, but with greater flexibility.

Where conventional systems have to be strategically placed to provide maximum protection, our VESDA ^® systems can be installed in easily accessible positions as the system is complimented by a network of our high grade ABS pipe work.

Additional benefits of using VESDA ^® over conventional detectors are greater reliability and efficiency with features which include entire airflow analysis and ignition point targeting, with the ability to work alongside existing smoke detection and air conditioning systems symbiotically.

Our VESDA ^® installations are in the widest variety of environments thanks to the ingenuity of the design, these including ceiling voids, cold rooms, computer rooms, and warehousing. The benefits and details of which can be viewed via the drop-down list above.

VESDA ^® & FSL

To ensure our systems are the best in the market we use the VESDA ^® system extensively and have installed them in a variety of environments ranging from multi million pound electronic environments through to priceless archive vaults and simple warehousing.

In addition to this we have developed and now manufacture our own highest grade ABS pipe work and fittings to compliment the VESDA ^® range. All of which is available to purchase via our on-line ordering facility.

With FSL you are guaranteed a high quality comprehensive protection system.

The VESDA ^® detection range

VESDA ^® detectors range from the VESDA ^® LaserFocus range, through to the VESDA ^® LaserCompact, VESDA ^® LaserPlus to the VESDA ^® LaserScanner.. Simply look to the VESDA ^® tab from where you can easily access details and data pertinent to each system.

AIR SAMPLING SYSTEMS

When high value assets, equipment or irreplaceable items are at stake, early warning of a smoke or fire problem, is essential. Our air sampling or air monitoring equipment actively pulls in room air to a special chamber where it can detect the presence of particles that are created in the very early stages of combustion, even before smoke is visible. With the world’s widest sensitivity range, VESDA air monitoring produces multi-level warnings at the very early stage of an impending fire. This provides the valuable time necessary to initiate a flexible, appropriate response.

VESDA aspirating smoke and gas detectors buy the critical time needed to investigate an alarm and initiate an appropriate response to prevent injury, property damage or business disruption. These detectors have multi-level warnings and a wide range of sensitivity that does not degrade or change over time, so even extremely small levels of smoke or gas can be detected before a fire has time to escalate.

VESDA Sensepoint XCL – Large Bore Aspirating Gas Detector

VESDA Sensepoint XCL – Large Bore by Xtralis is a gas detection solution that utilizes the ASD pipe network to deliver superior gas detection via multiple hole (multi-point) sampling. The combined solution provides reliable detection of gases for occupant protection and process monitoring while simultaneously ensuring protection against fire threats.

VESDA Sensepoint XCL – Micro Bore Aspirating Gas Detector

VESDA Sensepoint XCL – Micro Bore by Xtralis is used with VESDA-E VEA and provides early warning of the presence of gases for occupant protection and system monitoring while at the same time ensuring protection against fire threats

OSID Open-Area Smoke Detection

OSID by Xtralis is a new technology designed specifically for open air environments such as Large, open spaces – airports, train stations, stadiums and shopping malls, enabling early detection and response to save lives and prevent service disruptions. OSID uses a sophisticated algorithm to map and compare the strength of infrared (IR) and ultraviolet (UV) light signals from detectors configured in the space. OSID also reduces the costs of installation and maintenance as the Emitter batteries have more than a five-year life.

VESDA is right for multiple applications.

Computer Rooms

VESDA detection with Fire Suppression is a fantastic combination. With ever increasing environmental responsibilities, it is essential that a fire suppression system should deploy unnecessarily. VESDA smoke detection use in conjunction with conventional smoke detection is a perfect match. Preferably VESDA detection samples the air across the return plenums of the air conditioning systems which provide primary smoke detection! An alert alarm can be raised and human intervention can prevent the gas from discharging.

Warehouses

VESDA smoke detection is a suitable replacement for conventional smoke detection where accessibility is limited. For example, VESDA detection will be better suited to a warehouse with smoke detectors situated at high levels. Conventional smoke detectors can become faulty and access equipment will need to be deployed, this can be extremely disruptive to operation and it is also dangerous.

VESDA smoke detection eliminates this issue as the aspirating pipe work will be located at high levels and the VESDA detector will be located at accessible levels. Aspirating pipe will replace the smoke detectors at high level, with holes in the aspirating pipe replacing the smoke detectors.

Cold Storage

VESDA smoke detection is commonly used where temperatures are not suitable for other types of smoke detection. For example, a cold room operating temperatures ranging from -4°F to 40° F, is an ideal environment for VESDA smoke detection. Cold temperatures will ice up the optical chambers of conventional smoke detectors rendering the system useless.

VESDA detectors are located outside the cold environment, with aspirating pipe work located within the risk or outside the risk with capillary smoke sampling heads located within the risk! The cold air is then drawn to the VESDA smoke detector and is naturally heated before it arrives at the VESDA laser chamber. The condensation is collected at a condensate water trap and dry air arrives for sampling by the VESDA detector. In extreme cases air dryers may be needed, but in the most, are not required for the VESDA system!

Article Vesda High Sensitivity Smoke Detector

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