Hydromea LUMA™ Wireless at Depth · 10 Mbps · 50 m
LUMA X - emitter lit
LUMA is the world's most capable underwater wireless optical communication system. Five models - LUMA 100, 250LP, 500ER, X and X-UV - span short-range sensor links to 10 Mbps HD video at 50 m. Blue-light LEDs at 475–480 nm, a forgiving 120° beam and 1,500× the energy efficiency of acoustic modems.
✓SepcoTech is an authorised Hydromea distributor
The flagship, end to end
LUMA X, the fastest model in the range, shown here: a 480 nm LED emitter with a 120° beam at one end, the data interface at the other, and a pressure housing in between. LUMA 100, 250LP and 500ER share the 120° beam in a compact serial module.
- 01Emitter480 nm LEDs · 120° coneThe wide beam tolerates AUV motion and ROV drift: two units only need to roughly face each other.
- 02LUMA XUp to 10 Mbit/s · 50 mEnough bandwidth for real-time FHD video and 4K image streaming.
- 03Housing6,000 m depth ratingTitanium pressure housing: 6,000 m as standard, 12,000 m on request.
- 04InterfaceEthernet · RS-232 · RS-485Software-selectable, no hardware change.
Beyond acoustic. Beyond tethers.
Underwater data has always meant a trade-off - slow acoustic links, snag-prone cables, or laser modems that need millimetre alignment. LUMA removes all three constraints at once.
Acoustic Is Slow
Acoustic modems top out at a few kilobits - far too little for live video. LUMA X delivers up to 10 Mbps over the same kind of link.
Tethers Tangle
Umbilicals snag, drag and limit range in confined structures. An optical link cuts the vehicle free entirely.
Lasers Need Aiming
Narrow-beam laser modems demand precise pointing. LUMA's 120° cone simply needs two units roughly facing each other.
Power Is Scarce
Battery nodes can't afford power-hungry comms. LUMA moves each bit with 1,500× less energy than the fastest acoustic modem.
Wi-Fi-class data rates, through seawater
Blue-green light sits in the transmission window of seawater - the spectral band where absorption is lowest. LUMA exploits it with precisely tuned 475–480 nm blue LEDs and high-speed modulation, reaching data rates an acoustic modem can't approach while sipping a fraction of the power.
- LED wide-beam architecture tolerates AUV motion and ROV drift
- RS-232 / RS-485 serial on every model, plus Ethernet on LUMA X and X-UV
- Sub-10 mW sleep power for always-on battery sensor nodes (LUMA 100)
- Hydromea leads the Subsea Wireless Group (SWiG) interoperability standard
One Optical Family. Every Mission.
Choose the LUMA model that matches your data rate, range and depth. The blue-light models share a 120° wide-beam LED architecture, and every model has a software-configurable serial interface.
LUMA 100
| Data Rate | 115 kbit/s |
| Range | 2 m |
| Depth Rating | 6,000 m |
| Dimensions | 100 × 50 × 30 mm |
| Supply Voltage | 12–36 V |
| Sleep Power | <10 mW |
| RX Power | 0.5 W |
| TX Power | 2–5 W |
| Interface | RS-232 or RS-485 (configurable) |
| Beam Pattern | 120° cone |
Ideal for low-power sensor nodes, AUV docking stations and ultra-deep observatory links where minimal energy draw is critical.
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LUMA 250LP
| Data Rate | 250 kbit/s (up to 600 kbit/s at reduced range) |
| Range | 7 m |
| Depth Rating | 6,000 m |
| Dimensions | 100 × 50 × 30 mm |
| Supply Voltage | 12–36 V |
| Sleep Power | <10 mW |
| RX Power | 0.5 W |
| TX Power | 2–5 W |
| Interface | RS-232 or RS-485 (configurable) |
| Beam Pattern | 120° cone |
Built for wireless readout of landers, low-power links to battery-operated devices and wireless video for mini ROVs.
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LUMA 500ER
| Data Rate | 500 kbit/s |
| Range | 50 m |
| Depth Rating | 6,000 m |
| Interface | RS-232 or RS-485 (configurable) |
| Beam Pattern | 120° cone |
The versatile mid-range option for ROV telemetry, sensor data streaming and AUV-to-surface links where 50 m range and moderate bandwidth meet most operational needs.
Get a Quote →LUMA X
| Data Rate | 10 Mbit/s |
| Range | 50 m |
| Depth Rating | 6,000 m (12,000 m on request) |
| Interface | Ethernet, RS-232, or RS-485 (configurable) |
| Beam Pattern | 120° cone |
| Capability | Real-time FHD video & 4K image streaming |
The flagship - real-time HD video, high-resolution imaging and complex AUV operations, rated to 6,000 m as standard. LUMA technology is also what links the EXRAY wireless FLYOUT to its tethered ROV.
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LUMA X-UV - operates in any lighting condition
The LUMA X-UV variant uses ultraviolet light instead of blue - so it keeps a clean link in the presence of other light sources, including ROV work lights and ambient daylight in shallow water. 10 Mbps, 6,000 m depth, titanium housing, serial and Ethernet interfaces.
Two form factors. One optical standard.
The compact LUMA 100, 250LP and 500ER modules drop into sensor nodes and docking stations, while the cylindrical LUMA X carries the high-speed emitter and pressure housing rated to 6,000 m (12,000 m on request). Every model speaks the same software-selectable serial interface and LUMA X adds Ethernet, so integration is consistent across a whole fleet.
- Configurable RS-232 / RS-485 on every model, Ethernet on LUMA X and X-UV
- 6,000 m depth rating as standard, 12,000 m on request (LUMA X / X-UV)
- Drop-in compatibility with AUVs, ROVs, sensor nodes and topside
- SWiG-aligned for cross-vendor interoperability
LUMA Model Comparison
Side-by-side specifications for all LUMA models. Contact us for custom depth ratings, housing materials and integration support.
Full datasheets available on request. Contact us for application-specific configurations.
Wherever Bandwidth Matters Underwater
LUMA's high bandwidth and low latency open up underwater wireless applications that acoustic modems simply cannot support.
AUV Wireless Operations
Replace or supplement tethers on AUVs - real-time command, control and data transfer at up to 10 Mbps over 50 m. Ideal for docking stations, hover-capable AUVs and inspection robots like EXRAY.
Live Video Streaming
LUMA X carries enough bandwidth for real-time Full HD video - review footage live from a wireless ROV or camera node with no tether and no quality compromise.
Subsea Sensor Networks
Deploy low-power LUMA 100 nodes at each sensor - wireless mesh or star networks for environmental, structural and oceanographic data without cable infrastructure.
Deep-Sea Observatories
LUMA X's depth rating (6,000 m standard, 12,000 m on request) and the ultra-low sleep power of LUMA 100 and 250LP suit deep-ocean observatories - offloading data to passing AUVs or ROVs on demand.
Defence & Naval
Covert, low-probability-of-intercept optical links for hull-inspection data relay and seabed sensor networks - with no physical cable to manage.
Offshore Asset Monitoring
Wireless links between seabed sensors, pipeline monitoring nodes and visiting AUVs - replacing expensive umbilical infrastructure for long-term campaigns.
LUMA + EXRAY. The wireless FLYOUT.
EXRAY uses LUMA to go wireless where it matters. The optional EXRAY FLYOUT, a second robot, docks with the tethered EXRAY and detaches at the target; the tethered EXRAY then holds station and relays live video and control to it over LUMA optical light, up to 30 m beyond the tether. No tether drag and no entanglement at the target in confined structures.
- LUMA nodes on the tethered EXRAY turn it into the FLYOUT's relay
- Live HD video up to 30 m (100 ft) beyond the tether
- Full 6-DOF control retained over the wireless channel
- NAVIA™ sensor data transmitted alongside the video feed
- No tether to snag at the target in tanks and confined spaces
LUMA in Action
Footage from Hydromea - high-bandwidth wireless optical communication underwater, and just how quickly LUMA goes from box to live link.
LUMA X delivering high-bandwidth wireless data through water - the optical link that streams live video and sensor feeds with no tether. Source: Hydromea.
Plug & Play Setup
LUMA X is genuinely plug-and-play - power it, point the modems and the wireless optical link is live in moments, no configuration required.
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Tell us about your application and we will recommend the right LUMA model and prepare a tailored quote. SepcoTech is an authorised Hydromea distributor.
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