With the rapid development of lithium battery energy storage systems (BESS), AI data centers, hydrogen infrastructure, and industrial safety applications, the role of gas detectors is changing - from traditional on-site alarm devices to gradually becoming important data inputs in risk control, safety linkage, and operational decision-making systems.
In the equipment selection and technical specifications of industrial projects, "explosion-proof certification" is usually one of the important indicators for evaluating gas detectors.
However, an issue that deserves further attention is:
Does passing explosion-proof certification mean that the gas measurement performance of the gas detector has also been independently verified?
The answer is not like that.
Taking UL 1203 and UL 60079-29-1, which are commonly used in the North American market, as examples, the two standards focus on different dimensions of gas detection safety systems:
UL 1203 focuses on addressing the issue of whether equipment can be safely installed in corresponding hazardous locations;
UL 60079-29-1 further focuses on the issue of whether the equipment can reliably detect and measure combustible gases as required.
UL 60079-29-1 further focuses on the issue of whether the equipment can reliably detect and measure combustible gases as required.
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Understanding the differences between BESS, AI data centers, hydrogen energy, and high reliability industrial applications is an important foundation for establishing a complete gas detection technology evaluation system.
1、 UL 1203: Safety of Equipment in Hazardous Areas
The core positioning of UL 1203 is to conduct safety assessments on explosion-proof structures and ignition risks of electrical equipment used in hazardous areas.
Its applicability is not limited to gas detectors, but also includes various electrical equipment installed in corresponding hazardous classification areas.
The basic safety logic for equipment with corresponding explosion-proof structures is:
Even if there is a possibility of igniting flammable mixtures inside the equipment, its impact must be controlled according to applicable requirements to avoid the equipment becoming an ignition source for external hazardous environments.
Therefore, for gas detectors, UL 1203 mainly answers whether this equipment can be safely installed and operated in corresponding hazardous areas?
This is a very important layer of protection in the industrial safety system.
But it is not exactly the same as another key issue:
Can this detector measure the target gas accurately and reliably for a long time?
The latter belongs to the category of gas detection performance and long-term reliability, and is not the main certification purpose of UL 1203.
2、 UL 60079-29-1: Focus on the safety function of gas detection itself
The focus of UL 60079-29-1 varies.
This standard is aimed at the performance requirements of combustible gas or vapor detection and measurement equipment, and its evaluation object is not only the equipment itself, but also extends to the core safety functions undertaken by gas detectors:
Can the detector complete the detection, measurement, indication, and output according to the corresponding requirements when hazardous gases appear?
Therefore, compared to the explosion-proof properties of the equipment, UL 60079-29-1 focuses more directly on the performance of the gas detection function itself.
If summarized in two sentences:
UL 1203: Can equipment operate safely in hazardous environments?
UL 60079-29-1: Can the equipment reliably detect and measure flammable gases in hazardous environments?
The two focus on different security dimensions and are not simply interchangeable.
3、 From "Equipment Safety" to "Detection Performance": Industrial Gas Detection Requires Dual Perspectives
For industrial safety, a complete gas detection system actually requires answering two questions simultaneously:
Firstly, is the device itself safe?
When the equipment is installed in an area where there is a risk of combustible gas or vapor, it should not become a new ignition source.
Secondly, is the security function undertaken by the device reliable?
When hazardous gases actually appear, detectors need to promptly and accurately identify risks and provide reliable concentration data or alarm signals to the control system.
These two questions may seem similar, but they actually represent two different sets of security logics:
Installation Safety - Installation Safety
and
Detection Performance - Detection Performance
For gas detection equipment that undertakes critical safety functions, both are indispensable.
4、 Why do BESS and AI data centers need to pay special attention to "quantitative measurement"?
In traditional industrial scenarios, gas detectors often mainly serve as on-site alarm functions.
But with the rapid development of new infrastructure such as BESS and AI data centers, gas concentration data is increasingly participating in system level security control, such as:
Ventilation start → graded alarm → system linkage → energy isolation → fire response → operation and maintenance decision-making
This means that the output of gas detectors is no longer just simple:
With gas/without gas
And it may become a quantitative input parameter that directly affects the next action of the security system.
Taking a combustible gas detector with 0-100% LEL as an example:
10% LEL, 20% LEL, and 25% LEL do not just represent three different display numbers.
If the system design corresponds different concentration levels to different control strategies, then the detector's:
Measurement errors, response speed, long-term drift, and environmental adaptability may further affect the judgment and action of the entire safety system.
Therefore, for such high reliability applications, an increasingly important technical requirement is:
Gas detectors not only need to be able to detect risks, but also need to be able to reliably tell the system what the risk level is.
This is also one of the reasons why "quantitative gas measurement" has gradually become an important evaluation indicator for technical specifications of BESS, data centers, and other key infrastructure.
5、 Reliable explosion-proof structure does not necessarily mean that sensor performance is always reliable
Industrial gas detectors have a reliability feature that is easily overlooked:
The equipment casing, power supply, and electronic system may remain normal, but the performance of the core gas sensor may have changed.
During long-term operation, factors that may affect sensor performance may include:
1. Long term drift
As the running time increases, the zero point or sensitivity of some gas sensing technologies may gradually change.
Therefore, traditional industrial gas detectors typically require periodic calibration, functional testing, or sensor replacement to maintain the required detection performance.
2. Temperature impact
BESS containers, outdoor energy storage cabinets, data center UPS areas, and industrial sites are not always in a stable laboratory environment.
The sensitivity of different gas sensing technologies to high temperature, low temperature, and rapid temperature changes varies.
Therefore, compared to simply focusing on the temperature range within which the device can operate with power on, it is worth paying more attention to whether reliable measurement performance can still be maintained under wide temperature conditions.
3. Influence of humidity
Humidity changes may affect the output stability and long-term performance of some gas sensing technologies.
For long-term operation or even unmanned safety equipment, this factor needs to be included in the lifecycle reliability assessment.
4. Cross interference
The ideal condition of having only one target gas does not usually exist in real industrial environments.
VOC、 Solvent vapors, other flammable gases, and environmental pollutants may all have varying degrees of impact on different gas sensing technologies.
Therefore:
Being able to generate output does not necessarily mean being able to accurately identify target risks.
5. Sensor poisoning and pollution
This is one of the particularly noteworthy issues in the reliability of the industrial gas detection lifecycle.
Some sensing technologies may be affected by specific chemicals, resulting in a gradual decrease in sensitivity.
More noteworthy is:
Partial sensor performance degradation may not necessarily be accompanied by significant equipment failures.
The device may still have normal power supply, communication, and even continuous output of concentration data, but its actual gas response capability has changed.
Therefore, in the long-term operation of industrial safety systems, the anti poisoning, anti pollution, and long-term stability of sensors should not be regarded as a single sensor parameter, but should be included in the lifecycle risk management system of the entire detection system.
6、 Why does BESS environment need to pay special attention to sensor poisoning and pollution?
The interior of BESS is not simply a sealed space composed of batteries.
A complete energy storage system typically also includes a large number of other materials and components, including:
Sealing materials, gaskets, thermal interface materials, potting materials, coatings, adhesive materials, cables, and other polymer materials.
At the same time, the system may continue to experience:
Temperature changes, charge discharge cycles, air exchange, and material aging.
This means that gas sensors deployed within BESS need to face not only the target gas itself, but also adapt to more complex real-world environments.
For gas detection systems that undertake long-term safety monitoring functions, the selection of technology needs to be comprehensively considered:
Target gas response+environmental interference+chemical pollution+long-term drift+temperature and humidity adaptability
Therefore, the evaluation focus of modern industrial gas detection technology is gradually extending from simply focusing on the "initial accuracy" of equipment during operation to:
Effective detection capability throughout the entire lifecycle.
7、 Moving from 'periodic calibration' to 'stable operation with longer cycles'
Traditional industrial gas detection systems typically rely on periodic maintenance to manage long-term performance risks, including:
Bump Test → Calibration → Sensor Replacement → Preventive Maintenance
This maintenance model has long been an important component of the industrial safety management system.
But with the rapid deployment of BESS, AI data centers, and other large-scale infrastructure, their long-term maintenance costs are receiving increasing attention.
Assuming a large-scale project deploys hundreds or even thousands of gas detection points, even if the maintenance time required for a single device is limited, the long-term accumulation is:
Labor costs, downtime coordination, gas calibration, on-site entry, maintenance records, and human operational risks
Significant full lifecycle costs may still be incurred.
Therefore, one of the important development directions for the next generation of gas sensing technology is to continuously improve:
Long term stability, anti poisoning ability, anti-interference ability, wide temperature performance, and low drift ability
This further extends the maintenance cycle and reduces the system's reliance on frequent manual maintenance.
It should be emphasized that this does not mean that all gas detectors can be maintenance free.
More precisely, the industry is transitioning from:
Relying on frequent maintenance to maintain reliability
Gradually moving towards:
Reduce maintenance dependence through higher sensing technology reliability
Evolution.
8、 The selection of gas detectors is entering the stage of "four-dimensional evaluation"
For BESS, AI data centers, hydrogen energy, and other high reliability industrial projects, only ask:
Does this detector have explosion-proof certification
It is no longer sufficient to fully evaluate the technical capabilities of a gas detection solution.
A more systematic evaluation framework should include at least the following four dimensions:
01 | Installation Safety - Installation Safety
Does the equipment meet the hazardous location level and corresponding certification requirements required by the project?
UL 1203 and other standards mainly address this dimension of the problem.
02 | Detection Performance - Detection Performance
Has the key performance of gas detection, concentration measurement, response, indication, and output been independently evaluated according to applicable standards?
The gas detection performance standards such as UL 60079-29-1 mainly focus on this dimension.
03 | Application Reliability - Scene Reliability
Is the sensing technology used by the device truly suitable for the expected application environment? Has the resistance to silicon poisoning and high temperature of gas sensors been independently verified by a professional international third-party organization?
Further evaluation is needed:
High temperature, low temperature, humidity, cross interference, environmental pollution, sensor poisoning, and target gas characteristics.
04 | Lifecycle Reliability - Full Lifecycle Reliability
After several years of operation, can the device still maintain the required detection capability for the project?
Further attention is needed:
Long term drift, calibration cycle, sensor lifespan, maintenance cycle, and potential failure modes.
These four dimensions together constitute a more complete reliability evaluation framework for modern industrial gas detection systems:
Installation safety, detection performance, scene reliability, and full lifecycle reliability
9、 From 'device compliance' to 'trusted security features'
Industrial gas detection is undergoing a significant change.
In the past, projects often focused first on:
Does the device have the corresponding certification
Today, in BESS, AI data centers, hydrogen energy, and other critical infrastructure, an increasing number of high reliability projects require further answers:
Is this security feature truly trustworthy
The difference between UL 1203 and UL 60079-29-1 precisely reflects these two different dimensions of safety evaluation.
UL 1203 focuses on whether the equipment can be safely installed and operated in the corresponding hazardous environment;
UL 60079-29-1 further focuses on whether the equipment can reliably perform combustible gas detection and measurement functions.
For BESS, AI data centers, and other critical infrastructure, further progress is needed in engineering evaluation:
Not only should we focus on whether the device can be installed, but also on whether it can be measured accurately;
Not only should we pay attention to whether the requirements are met when it is put into operation, but also whether it is still reliable after many years of operation.
As a result, the competitive dimension of industrial gas detection technology is expanding from traditional explosion-proof and equipment compliance to:
Accurate quantitative measurement, anti poisoning, anti-interference, low drift, wide temperature adaptability, and full lifecycle reliability.
For gas detection systems that undertake critical safety functions, what is truly important is not just obtaining certification, but establishing safety credibility throughout the entire lifecycle of the equipment:
From installation security, to detection performance, to long-term operation - ensuring that security features remain reliable throughout their entire lifecycle.
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The hydrogen sensor series models under the company have obtained UL 2075 certification in the United States and CAN/ULC 588 certification in Canada. The working temperature range of the products covers -40 ℃ to 105 ℃, and they have become industry benchmarks in terms of environmental adaptability, long-term stability, resistance to silicon poisoning, and reliability. They have been widely used in energy storage system safety monitoring, AIDC infrastructure, and new energy related scenarios.
Advanced gas sensing solutions include:
Low concentration and multi-level hydrogen detection and system linkage: achieve integration of low concentration (500ppm), 10% LFL (4000ppm), 25% LFL (10000ppm) multi-level concentration hydrogen detection with battery management system (BMS) and safety control strategy.
Anti pollution and anti silicon poisoning design: effectively reduces the chemical coverage of sensitive components by interfering substances such as VOCs and siloxanes, and improves the stability of hydrogen and CO sensors in long-term high pollution environments.
Optimization of high temperature resistance: Meet the continuous testing requirements of energy storage facilities under closed energy storage cabinets and high temperature operating conditions before operation.
Improved lifecycle stability: Extend the effective operating cycle of sensors, reduce the risk of frequent on-site replacement, maintenance, and drift.
About ProSense
ProSense is a high-tech enterprise dedicated to the research and manufacturing of advanced gas sensors, committed to providing high-performance and high reliability sensing solutions for global customers. The company continues to invest in core technology research
and development, overcome key pain points in the industry, and continuously lead the development direction of gas sensing technology. With innovative products and excellent quality, ProSense is gradually growing into an important promoter and leader in the global gas
safety monitoring field.
ProSense adheres to the full stack self-developed technology route, and has established a kilogram level gas sensor catalyst research and development base and an automated production aging calibration system for millions of gas sensors per year. Its product line covers
the fields of toxic and harmful, flammable and explosive, and environmental gas detection; ProSense multiple innovative products have become core sensing components in vertical fields such as smart firefighting, industrial testing, and energy storage safety.
