Most explosion proof camera projects start with one question: is there a practical way to get a cable to the camera? When the answer is no, or not within the budget and timeline of the job, wireless becomes the deciding factor. This guide covers when wireless makes sense in oil and gas and other hazardous areas, the connectivity options and their trade-offs, how antennas fit into a certified enclosure, power without cable, cybersecurity basics, and a checklist.
If you are new to the subject, the guide to understanding explosion proof cameras explains how flameproof enclosures and certification work. This article assumes that background and focuses on the wireless layer.
When Wireless Makes Sense
Wireless is not a replacement for cable everywhere. It earns its place in a specific set of situations:
- Remote wellsites and satellite facilities. A pad, tank battery, or compressor station that is kilometers from the nearest network switch has no economical conduit path. A cellular or point-to-point link is often the only realistic way to bring video back to the control room.
- Temporary monitoring. Turnarounds, shutdowns, construction in classified areas, robotic tank cleaning, and IDLH area watch are short-term jobs. Trenching conduit for a few weeks of use rarely makes sense.
- No conduit path. Existing plants often have full cable trays, congested conduit runs, or areas where cutting and welding for new conduit requires hot work permits. A wireless link avoids that disruption.
- Rental deployments. Rented cameras are expected to arrive, go up on a pole or wall mount, and start streaming the same day. Wireless connectivity is what makes that possible. Spectrum’s explosion proof camera rental program includes a 4G/LTE modem where applicable, remote access configuration, and pre-deployment setup and testing.
Wireless does not change the hazardous area requirements. A camera in a Class I Division 1 or Zone 1 location needs the same certification whether it connects over cable or over the air, and the radio and antenna become part of the certified assembly.
Connectivity Options and Their Trade-Offs
Three families of wireless technology cover most hazardous area camera projects.
Cellular (4G/LTE and 5G)
Cellular is the default choice for remote and temporary sites because it needs nothing on your side beyond a SIM and a modem. Coverage is defined by the carrier, so a signal survey is the first step. Upload bandwidth, not download, is what matters for video. Private LTE and 5G networks remove the dependency on public coverage but require their own radio infrastructure.
- Bandwidth: adequate for one or several HD streams, with H.265 compression helping where upload is limited.
- Latency: acceptable for live view and PTZ control, with public networks showing more variation than private ones.
- Coverage: wide where carriers have towers, poor in many remote basins and offshore.
- Security: carrier encryption plus a VPN is the usual practice; see the cybersecurity section below.
Wi-Fi
Wi-Fi works when the camera is within a few hundred meters of an existing plant network with access points rated for the area. It offers high bandwidth and low latency at close range, but coverage drops quickly around steel structures, tanks, and vessels, and interference from other equipment is common. For a remote site with no plant network it rarely fits.
Point-to-Point and Point-to-Multipoint Radios
Radio links connect a camera location to a plant network over distances from a few hundred meters to many kilometers, provided there is line of sight. They deliver high, predictable bandwidth and low latency with no carrier dependency. The costs are a clear path between antennas, mounting height, alignment, and a second radio on the receiving end.
| Option | Bandwidth | Latency | Coverage | Typical use |
|---|---|---|---|---|
| Cellular 4G/LTE, 5G | Moderate, limited by upload | Moderate, variable on public networks | Wherever a carrier has signal | Remote sites, rentals, temporary jobs |
| Wi-Fi | High at short range | Low | Short range, affected by steel | In-plant with existing wireless |
| Point-to-point radio | High and predictable | Low | Long range with line of sight | Linking a remote location to the plant LAN |
Antennas and the Explosion Proof Enclosure
The flameproof enclosure contains any ignition from the camera electronics, but an antenna has to radiate outside that enclosure. The antenna and its feedthrough therefore need their own protection concept, and the whole assembly must be evaluated and certified together.
- Antenna certification. The certificate and the marking should cover the wireless configuration, not just the housing. On Spectrum’s F-Series fixed cameras page, the wireless models are listed with an additional encapsulation and intrinsic safety marking (mb [ia Ga] for gas, mb [ia Da] for dust), showing that the radio path has been assessed under the same scheme as the enclosure.
- Placement. Antennas need line of sight to the tower or the far radio and should be kept clear of large steel surfaces. Mounting height matters. Relocating an antenna on a longer cable changes the certified configuration, so it is a question for the manufacturer, not a field decision.
- Temperature. Radios and antennas can narrow the certified ambient range. The standard F2xx fixed camera is certified from -50 C, while the wireless F2xx versions are certified from -40 C. Check this against the coldest expected site temperature before choosing a wireless configuration.
- Cable entries. Even a wireless camera typically needs power. The F2xx has three cable entries (3/4″ 14-NPT or M25x1.5), which leaves room for power and a spare entry while the radio handles the data path.
Power When There Is No Cable
Wireless removes the data cable, not the need for electricity. Cameras with heaters and PTZ motors draw more than a consumer camera, so power is often the harder part of a remote deployment.
- Local power. Where a site has AC or DC power nearby, that is the first choice. The F2xx accepts 120-240 Vac, 12 Vdc, 24 Vdc or PoE 802.3bt, with a maximum draw of 90 W, and includes a heater with a thermostat. Budget for the heater, not just the camera.
- Solar with batteries. For wellsites with no power, a solar array with a battery bank sized for the camera, modem, and heater load can run continuously. Sizing depends on winter sun hours, days of autonomy, and heater duty cycle.
- Batteries alone. Battery-only operation suits short rentals and inspections measured in days, with a plan to swap or recharge packs. Any battery or power supply enclosure located in the classified area needs its own hazardous area rating; the camera certificate does not cover it.
Place the solar array, batteries, and modem in an unclassified location whenever the layout allows it, and keep only the certified camera in the hazardous area.
Cybersecurity Basics for Wireless Cameras
A camera that reaches the control room over a carrier network is a device on the internet unless you design otherwise.
- VPN tunnel. Route the camera or modem through a VPN to your network rather than exposing the camera’s web interface or RTSP port to the public internet.
- Network segmentation. Keep cameras on their own VLAN with firewall rules that allow only the video management system and authorized users to reach them. Never bridge the camera network to the process control network.
- Credentials and firmware. Change default passwords, use unique accounts, disable unused services, and keep camera, modem, and radio firmware current.
- Encryption in transit. Use HTTPS for management and encrypted streaming where the video management system supports it. Wi-Fi links should use WPA3 or WPA2-Enterprise, and point-to-point radios should have link encryption enabled.
Spectrum’s D-Series dome cameras page notes IEC 62443 cybersecurity compliance for its PTZ models, a useful reference when a security team asks what standard the platform follows.
Wireless Options in the Spectrum Line
Spectrum designs and manufactures its explosion proof cameras in Houston, Texas. For wireless projects the relevant facts, as stated on the product pages, are these:
- The F200 Series fixed camera is described as a multi-connectivity platform that supports SFP fiber, 4G and 5G wireless alongside PoE, all in one enclosure. The F2xx family is FM certified (certificates FM24US0209X and FM24ATEX0026X) for Class I Division 1 Groups B, C, D; Class II/III Division 1 Groups E, F, G; Zone 1 AEx db IIB+H2 Gb; and Zone 21 AEx tb IIIC Db, with ATEX and IECEx (Ex db) certification as well. The F-Series carries a Type 4X / IP66 enclosure rating. Group B and gas group IIB+H2 cover hydrogen atmospheres.
- Certified ambient ranges for the standard F2xx are -50 to +50 C (T6), -50 to +65 C (T5), and -50 to +90 C (T4). Wireless F2xx versions are certified from -40 C.
- The D-Series dome cameras in panoramic, fisheye, and PTZ form factors are described as PoE, media converter, and 5G ready, and several listings on that page are tagged as 4G or 5G wireless.
- The rental program offers fixed and PTZ explosion proof cameras with 4G/LTE or wired connectivity, with a modem, remote access configuration, and 24/7 live view included where applicable.
Certificates for every family, with downloadable PDFs for submittals, are listed on the certifications page. Standard configurations can be ordered through the official online store, and wireless or custom configurations go through a quote request so the connectivity, power, and temperature details can be confirmed before anything ships.
Wireless Deployment Checklist
- Confirm the area classification (Class/Division or Zone, gas group, temperature class) and verify that the wireless configuration, including the antenna, is covered by the certificate.
- Check the coldest and hottest expected ambient temperatures against the certified range of the wireless version, not the standard version.
- Run a signal survey at the exact mounting point and height for cellular, or confirm line of sight for a point-to-point radio.
- Estimate upload bandwidth per camera at the resolution, frame rate, and codec you plan to use, and compare it with what the link can sustain.
- Decide on the power source: local AC or DC, PoE from a nearby enclosure, or solar with batteries sized for the heater load in winter.
- Design the network path: VPN, segmented VLAN, firewall rules, unique credentials, and encrypted links.
- For temporary jobs, compare purchase against rental, including setup, support, and return logistics.
Frequently Asked Questions
Does a wireless explosion proof camera need a different certification than a wired one?
It needs the same hazardous area certification for the enclosure, plus coverage of the radio and antenna as part of the assembly. Ask for the certificate that lists the wireless configuration rather than assuming the housing certificate covers an added antenna.
Is 4G/LTE good enough for live video from a remote wellsite?
In most locations with usable signal, yes, for one or a few HD streams using H.264 or H.265. Upload speed is the limiting factor, so measure it at the mounting point before committing to resolution and frame rate.
How do I power a camera where there is no electricity?
Solar with a battery bank is the usual answer for permanent sites, and batteries alone work for short rentals. Size the system for the heater load in winter and keep the power equipment outside the classified area when the layout allows it.
Can I rent a wireless explosion proof camera for a turnaround?
Yes. Spectrum’s rental program supplies fixed and PTZ explosion proof cameras with 4G/LTE connectivity, a modem where applicable, remote access configuration, and support during the rental period. Duration and pricing are customized to the project.