If you’ve ever worked in an industry where a spark could turn a routine task into a dangerous incident—oil and gas refineries, chemical processing plants, grain elevators, or mining operations—you know how critical reliable, safe wireless connectivity is. As someone who’s spent the last decade designing and manufacturing explosion proof wireless access points (APs), I’ve seen first-hand how a single overlooked detail can make or break a site’s ability to stay connected and compliant with strict safety standards. Today, I want to talk about one of those often-overlooked details: RF output, and how it’s not just a technical specification—it’s the line between a high-performing AP that keeps teams connected and a piece of equipment that could put everyone at risk. Explosion Proof Wireless AP
Let’s start with the basics to set the stage. Explosion proof APs aren’t your home Wi-Fi router. They’re engineered to contain any internal spark or arc from wiring, components, or signal transmission so that if they’re installed in a hazardous location (classified as Division 1, Division 2, or Zone 0, 1, 2 per global standards), that spark never escapes to ignite flammable gases, dust, or vapors in the air. That core engineering non-negotiable shapes every part of the AP’s design—including its RF output. RF output, measured in milliwatts (mW) or decibels relative to 1 milliwatt (dBm), is the power level at which the AP transmits its wireless signal. For consumer APs, cranking that output to the maximum is usually a win: it covers more area, reduces dead zones, and makes devices connect faster. But for explosion proof APs, it’s a balancing act between performance, compliance, and safety that can’t be overlooked.
Let’s break down the impact of RF output step by step, starting with the most obvious: coverage. I once worked with a large chemical plant in the Gulf Coast that was struggling with their old generic explosion proof APs. Their operators, who work on a 2,000-foot processing unit, were complaining that their rugged tablets kept dropping signals when they walked from the control room to the far end of the pipe rack. The old APs had a maximum RF output of 50 mW (17 dBm). When we swapped them for our units with 100 mW (20 dBm) output, the dead zones vanished—operators could stream real-time sensor data from their tablets without dropping a single connection for 12 months afterward. But here’s the catch: that 50% increase in RF output didn’t just boost coverage. It let us use fewer APs, which reduced installation and maintenance time for the plant. For industrial sites where every piece of equipment has to be inspected regularly, fewer units mean less downtime and lower long-term costs. That’s a concrete performance win, but only when that RF output is calibrated correctly for the site’s size.
But coverage is only part of the story. Reliability is another big one. In hazardous locations, connectivity isn’t just about convenience—it’s about safety. Operators rely on Wi-Fi to receive emergency alerts, shut down processes remotely, and communicate with control rooms. If an AP’s RF output is too low, the signal is weak and prone to interference from metal pipes, concrete walls, or other industrial equipment. We had a refinery client in the Permian Basin install APs with too low an RF output a few years back. Within three months, they were dealing with constant dropped connections that delayed response times during a valve failure scare. By bumping the RF output to the level we recommended for their specific layout, they cut connection drop rates by 92% in 30 days. The takeaway here is simple: RF output directly impacts signal strength, which in turn impacts connection reliability—something non-negotiable when lives are on the line.
Now, let’s get to the part that most people don’t talk about: safety compliance, which is the entire reason explosion proof APs exist. You can’t just crank RF output to whatever number you want and call it a day. Global standards like IECEx, NEC Article 500, and ATEX set strict limits on how much RF power can escape an explosion proof enclosure, because excess power can create a spark if it’s not contained. Here’s why that matters to our manufacturing process: when we design our APs, every component—from the transmitter to the antenna—is tested to ensure that even at maximum rated RF output, no external spark is produced. If we use too high an RF output, we have to beef up the enclosure, which adds cost and bulk—something that’s a non-starter for our clients, who often need APs that fit in tight spaces like pipe racks or junction boxes. Conversely, if we set the RF output too low, we risk failing compliance tests, and the AP can’t be installed in classified locations. I’ve seen other explosion proof AP manufacturers cut corners here: they’ll rate their APs for a higher RF output than their enclosure can safely contain, and that’s a ticking time bomb for clients who rely on compliance to operate. As a supplier, we test every unit at 110% of its rated RF output to make sure it never exceeds the safety threshold—this isn’t just quality control, it’s part of our promise that our APs won’t become an ignition source.
Next, let’s talk about interference. Industrial sites are crowded with other RF devices: process control systems, SCADA, emergency radios, and even other wireless APs. If one AP has too high an RF output, it can flood the frequency band, causing signal interference that messes with other devices’ performance. Last year, we worked with a grain elevator that was having issues with their load-out sensors. The sensors were failing to transmit data because a new AP they’d installed had an RF output that was 30% higher than recommended for the site. The strong signal from the AP was bleeding into the 2.4 GHz band, where the sensors operate, causing constant signal collisions. When we adjusted the AP’s RF output to the calibrated level for the grain elevator’s layout, the sensor issues stopped. That’s another key point: RF output doesn’t just affect the AP’s own performance—it affects the entire network and adjacent equipment on the site. At our company, we don’t just sell APs with fixed RF output; we provide site-specific calibration services that adjust the output based on the site’s size, number of devices, and existing RF environment. That’s a value add that comes from decades of working with hazardous locations, not just a spec sheet.
Battery life is another performance factor that’s tied to RF output, and it’s something that’s often overlooked in industrial settings. Most mobile devices used in hazardous locations—tablets, hand radios, sensors—run on batteries that can’t be easily replaced (or recharged without following strict safety protocols). If an AP has too low an RF output, mobile devices have to transmit at a higher power level to connect, draining their batteries faster. We did a study a few years back comparing APs with low, medium, and high RF output for a petrochemical plant’s mobile devices. When connected to our medium-calibration RF output APs, the mobile devices’ battery life increased by 45% compared to when they were connected to APs with lower RF output. That meant operators didn’t have to swap out batteries every three days, which reduced downtime and safety risks from working at height to replace batteries. On the flip side, too high an RF output from the AP can also hurt battery life: if the signal is so strong that devices stay connected, they’re constantly transmitting, which also uses more power. It’s a fine line, but one that’s critical for overall network performance.
Now, let’s address a common question we get from clients: why can’t we just use consumer APs in hazardous locations with higher RF output? The answer comes down to that explosion proof enclosure, as well as RF compliance for industrial use. Consumer APs are designed for unclassified locations, with RF output that’s not optimized for metal-dense industrial environments. Even if you could make a consumer AP explosion proof, the RF output would be limited by the enclosure’s ability to contain sparks. As industrial explosion proof AP suppliers, we have to balance three things: maximum possible RF output for coverage and reliability, safety compliance for classified locations, and interference control for crowded industrial sites. That’s why our engineering team spends months testing each new AP model in real-world industrial environments, not just lab conditions.
I want to share a recent example that really drives this home. A major North American refinery reached out to us last year because their old APs had an RF output that was too high, leading to interference with their critical SCADA system. The SCADA system controls the refinery’s pumps and valves—if it goes down, it’s a shutdown, which costs millions of dollars an hour. The old APs were rated for 150 mW (21.76 dBm), but their enclosure couldn’t contain the RF signal properly, leading to unintended signal leakage that interfered with the SCADA’s 900 MHz band. We worked with their engineering team to replace those units with our APs, calibrated to 80 mW (19.03 dBm) RF output, which met all IECEx and NEC standards and eliminated the SCADA interference. Within a month, the refinery reported a 99.8% uptime for both the APs and the SCADA system, which had not happened in the three years prior. That’s the real-world impact of getting RF output right: it’s not just about Wi-Fi performance, it’s about keeping critical industrial operations running safely.
So what should you look for when evaluating explosion proof APs and their RF output? First, make sure the RF output is compliant with global safety standards for classified hazardous locations. A lot of suppliers will advertise high RF output numbers, but don’t confirm that those numbers are tested and approved for explosion proof enclosures. Second, ask if the supplier provides site-specific calibration. Every hazardous location is different: a small chemical storage room has different needs than a 10,000-foot refinery. A one-size-fits-all RF output will never perform as well as a calibrated one. Third, look for a supplier that tests their APs in real industrial environments, not just lab conditions. RF output doesn’t exist in a vacuum—it has to work around metal, concrete, dust, and other RF noise that’s part of industrial sites.
At the end of the day, our job as explosion proof wireless AP suppliers is simple: we have to provide connectivity that works and keeps people safe. RF output is not just a technical spec on a datasheet—it’s the foundation of that promise. Too low, and you get dead zones, dropped connections, and critical failures. Too high, and you risk safety hazards, compliance issues, and interference with other equipment. Finding that sweet spot is what makes a good explosion proof AP great, and it’s what we’ve focused on for every unit we manufacture over the years.
If you’re working in a hazardous location and looking for reliable, safe wireless connectivity, we’re here to help. We can assess your site’s layout, RF environment, and safety requirements to recommend the right explosion proof APs with calibrated RF output that meets your needs. Let’s connect to discuss your project in detail.
Explosion Proof Wireless Bridge References
- International Electrotechnical Commission (IEC). IEC 60079-0: Explosive atmospheres – Part 0: Equipment – General requirements. 2021.
- National Fire Protection Association (NFPA). NFPA 70: National Electrical Code (NEC), Article 500: Hazardous (Classified) Locations. 2023.
- European Committee for Electrotechnical Standardization (CENELEC). EN 60079-0: Explosive atmospheres – Part 0: Equipment – General requirements. 2021.
- Industrial Wireless Association (IWA). Best Practices for Wireless Network Design in Hazardous Locations. 2022.
Jinan Bodaxun Communication Technology Co., Ltd.
With abundant experience, we are one of the most professional explosion proof wireless ap manufacturers and suppliers in China. Please rest assured to buy high quality explosion proof wireless ap for sale here from our factory. For price consultation, contact us.
Address: 4-501, Future Smart Manufacturing Center, China Computing Valley, Liandong U Valley, High-tech Zone, Jinan City, Shandong Province
E-mail: lmj@bodacomwlan.com
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