905 nm · Class 1 eye-safe · DToF
12 grams. 3,000 meters.
905 nm Class-1 eye-safe DToF rangefinder modules for night vision, thermal and UAV integration — sized to disappear into the payload, specified to be trusted.
One wavelength, seven form factors
Pick the module by the payload,
not the datasheet
Every module here is 905 nm, Class-1 and UART-TTL. They differ where it matters to an integrator: reach, weight, and the shape that fits your housing — from a 6 g micro engine to a 3,000 m flagship.
Why 905 nm
The right wavelength for
compact, eye-safe ranging
905 nm direct time-of-flight runs on low-cost silicon detectors — which is what makes these modules small, affordable and Class-1 eye-safe at the same time. For sub-3 km night-vision, thermal and UAV work, it is the wavelength that fits the payload.
Detects on cheap, mature silicon — no exotic receiver, so the module stays compact and cost-effective.
905 nm stays Class-1 under IEC 60825-1 — safe to use and align around people, unlike designators.
Ideal for night vision, thermal clip-ons and UAV gimbals where reach and SWaP have to balance.
Need longer reach or a wider eye-safe margin? Move to 1535 nm on the ERDI global site.
Where these modules earn their keep
Built for the dark
and the moving
Night vision & thermal sights
Add a precise range readout to a monocular or clip-on without breaking its weight or eye-safety budget. 905 nm stays Class-1 for use around people.
Fit: SPD1200M2 · SPD1200N0 · LR1000B23
UAV & drone payloads
Altitude hold, terrain following and target cueing in EO/IR gimbals where every gram of SWaP is contested. Adaptive output trades refresh for reach mid-flight.
Fit: LRF3000A1 · SPD1200S2G · LR1500E2
Security & surveillance
Perimeter ranging, gate control and trigger sensing with eye-safe emission and IP67 lens cavities for continuous outdoor duty.
Fit: LR1200D23 · LR2000E2 · SPD1200Z2
Industrial monitoring & robotics
Obstacle and level sensing for mobile robots, AGVs and fixed process monitoring — the short-range DToF line adds sub-1,500 m sensors from 1 g alongside the continuous-duty industrial series.
Fit: LRF100H · LR1500E2 · SPD1200S2
Handheld optics
Meter-class ranging for portable instruments and sport optics — from a body small enough to hold in the objective bell.
Fit: LRF3000A1 · LR1000C3 · LR1000E2
Surveying & mapping
Consistent, repeatable readings across a full working day for total stations, laser levels and mapping rigs.
Fit: LRF3000A1 · LR1500D23 · LR2000E2
905 nm ranging in an EO/IR gimbal payload
Designed and built in-house
Specified, tested,
and backed
We design and build every module in-house — CNC machining, clean assembly and automated calibration under one roof, with more than 15% of revenue reinvested in R&D each year.
905 nm emission stays eye-safe for use and alignment around people.
Shock and vibration qualified for airborne and vehicle platforms.
Sealed optics hold up to dust, rain and continuous outdoor duty.
First-year free replacement, then lifetime technical support.
Built to your spec
Make it yours,
from sample to production
We build the modules, so we can change them. Start from a standard model and adapt only what you need — or specify a module from the mechanical envelope out.
Mechanical envelope
Custom housing, mounting and connector to drop into your optical assembly.
Interface & driver
UART-TTL tuned to your baud and pinout, or custom driver electronics.
Firmware behaviour
Measurement cadence, output frame, continuous / triggered modes to suit your host.
Logo & packaging
Laser-engraved branding and packaging for a finished OEM product.
Who you're buying from
One wavelength.
Built by the people who make it.
ERDI is a Chengdu-based laser manufacturer with regional offices across North America, Canada, Japan, Singapore and Taipei. We make the 905 nm modules, run the calibration, and stand behind every unit — you talk directly to the engineers who build them.
ERDI TECH LTD · offices
- Headquarters
- Chengdu, China — Longquanyi District
- United States
- Jurupa Valley, California
- Canada
- Surrey, British Columbia
- Japan
- Osaka
- Singapore
- Singapore
- Taiwan
- Taipei
Tell us what you're integrating
Get a quote and a straight technical answer
Send the platform, the range and accuracy you need, and your volume. We reply with pricing, lead time and the right module — within one business day.