Short answer: the datasheet range number on any laser rangefinder is a best-case figure tied to a specific target reflectivity, and the honest way to size a gimbal or EO payload rangefinder is to plan against your worst-case target and lighting, not the headline number. Below is how reflectivity, ambient light and update rate actually move the working range and accuracy you’ll get in the field, mapped to which ERDILRF family fits which payload class.
Reflectivity: the number that quietly halves your range
Every DToF module in ERDILRF’s H-series and VB-series publishes two range figures — one at 90% target reflectivity, one at 10% — and the gap between them is not small. LRF200H is rated 0.05–200 m against a 90%-reflective target but only 0.05–70 m against a 10%-reflective one. LRF100H drops from 100 m to 30 m across the same reflectivity range. LRF600H drops from 600 m to 200 m (sources: LRF200H.md, LRF100H.md, LRF600H.md). A dark, matte, low-reflectivity surface — think weathered asphalt, dark vegetation, or a matte-painted vehicle — behaves closer to the 10% case than the marketing number on the box.
For a gimbal or EO payload, this means sizing the module against the least reflective target your mission actually needs to range, not the best one. A perimeter-security gimbal that occasionally has to range a dark rooftop edge or a matte vehicle roof should be selected against the 10%-reflectivity number for that model, with the 90% figure treated as headroom rather than the requirement.
Ambient light: two different ways ERDILRF’s own datasheets report it
Here’s a genuine inconsistency worth flagging rather than smoothing over, because it’s a direct illustration of why we don’t extrapolate specs across a model family. ERDILRF’s H-series datasheets (LRF100H, LRF200H, LRF300H, LRF600H, LRF1500H) report ambient light immunity as an illuminance threshold: 100 kLux across all five models (source: each model’s own spec table). ERDILRF’s VB-series and LRF50H, by contrast, report ambient light immunity as a range in metres — LRF22VB at 8 m, LRF50VB at 10 m, LRF10VB at 2 m, LRF50H at 45 m (same sources). These are two different metrics, not the same spec in different units, and we’re not converting one into the other or assuming the H-series number applies to the VB-series — that’s exactly the kind of same-family extrapolation that has caused real spec errors in this catalog before. If your application needs a guaranteed performance figure under a specific outdoor illuminance, check which metric your candidate model actually publishes, and ask us directly if it isn’t the one you need.
For context on why this matters for gimbal payloads specifically: outdoor daylight sensing is a genuine engineering challenge for any pulsed time-of-flight sensor, since strong ambient IR content competes with the return pulse. LightWare’s own SF20/C product page markets direct-sunlight tolerance as a feature worth calling out (“measures 0.2 to 100 m… even in bright sunlight conditions,” fetched 2026-09-04) — which is a useful signal that this is an industry-wide differentiator, not an ERDILRF-specific quirk.
Update rate: match it to how fast your gimbal actually slews
Measurement frequency varies by an order of magnitude or more across ERDILRF’s catalog, and it also varies model-by-model within the LR-series itself — don’t treat “LR-series” as one number. LRF1200A1 is specified at 1–3 Hz. Within the LR-series, LR1000E2 runs 3–10 Hz adaptive, while LR1200E2, LR1500E2 and LR2000E2 each run 2–10 Hz adaptive (sources: LR1000E2.md, LR1200E2.md, LR1500E2.md, LR2000E2.md). LRF3000A1 runs 3–10 Hz in normal mode and 1–10 Hz adaptive in long-range mode. The H-series DToF modules (LRF100H–LRF1500H) run 20 Hz to 10 kHz with a 1 kHz default, and several — LRF300H, LRF600H, LRF1500H — automatically switch between 1 kHz and 50 Hz based on reflected-signal intensity (sources: each model’s own spec table).
A gimbal tracking a fast-moving target, or one being slewed quickly by an operator, needs range data fast enough that the target hasn’t moved meaningfully between samples — the H-series’ kHz-class rate is built for that. A fixed-mount or slow-pan long-range EO payload ranging a distant, largely static target can trade update rate for the much longer reach the LR-series and LRF3000A1 offer instead — roughly 1–10 Hz depending on the specific model (see the exact per-model figures above).
Accuracy formulas aren’t flat — read the whole equation
Accuracy specs in this catalog are piecewise, not a single ± number across the whole range. LR2000E2 is ±1 m out to 400 m, then distance×0.4% beyond that — a separate figure, not the 1 m tolerance plus a percentage. LRF3000A1 is ±0.7 m out to 100 m, then ±(0.7 m + distance×0.3%) beyond. LR1200E2 is ±1 m from 6–500 m, then ±(50 cm + distance×0.1%) from 500–1,000 m (sources: LR2000E2.md, LRF3000A1.md, LR1200E2.md). Whatever accuracy budget your gimbal’s stabilization or object-tracking math needs from the range data feed, compute it at your actual working distance against the model’s own full formula, not a headline “±1 m” that only applies at short range, and not another model’s formula shape.
Mapping range needs to ERDILRF model families
| Payload class | Recommended family | Range (90% reflectivity or stated) | Update rate | Published price |
|---|---|---|---|---|
| Close-range security / short-standoff gimbal | LRF200H | 0.05–200 m | 20 Hz–10 kHz (1 kHz default) | $250 USD/unit |
| Mid-range EO payload | LRF1200A1 | 5–1,200 m | 1–3 Hz | $130 USD/unit |
| Extended-range EO payload | LR2000E2 | 4–2,000 m | 2–10 Hz adaptive | $160 USD/unit |
| Long-range gimbal / flagship EO payload | LRF3000A1 | 1 m to 3,000+ m | 1–10 Hz adaptive | $260 USD/unit |
Sources: each model’s own page in products/*.md; prices verified against erdilrf.com/models/ on 2026-09-04. For the wavelength decision behind these families, see our 905 nm vs 1535 nm UAV gimbal and payload selection guide.
Frequently Asked Questions
Should I size a gimbal rangefinder against the 90% or 10% reflectivity spec?
Against the 10% figure, or whatever number matches your worst realistic target — a dark, matte, or low-contrast surface. The 90% figure is a best-case number achieved on a bright, diffuse target and will overstate your working range against anything darker.
Do all ERDILRF modules report ambient light performance the same way?
No. The H-series reports it as an illuminance threshold (100 kLux across LRF100H–LRF1500H). The VB-series and LRF50H report it as a range in metres instead. These are different metrics, and we don’t convert or assume one family’s number applies to another — check the specific model’s own spec table, or ask us.
What update rate does a fast-slewing gimbal need from its rangefinder?
As high as the target’s apparent motion demands — the H-series DToF modules run 20 Hz to 10 kHz, well suited to fast tracking. Slower-panning, longer-range EO payloads can trade that for the much longer reach of the LR-series or LRF3000A1 instead, which run roughly 1–10 Hz depending on the specific model (LR1000E2 is 3–10 Hz; LR1200E2, LR1500E2 and LR2000E2 are 2–10 Hz; LRF3000A1 is 1–10 Hz in long-range mode).
How do I compute actual accuracy at my working distance?
Use the model’s own full accuracy formula, not just the near-range figure, and don’t assume one model’s formula shape applies to another. For example LR2000E2 is ±1 m out to 400 m, then simply distance × 0.4% beyond — not the 1 m tolerance plus a percentage.
Which ERDILRF model is the flagship for long-range gimbal integration?
LRF3000A1, rated for 1 m up to at least 3,000 m under the reflectivity and visibility conditions specified in ERDILRF’s manual, at $260 USD per unit. It’s the longest-range model in the published catalog.
Tell us your target reflectivity and range requirement
Give us your worst-case target reflectivity, working distance and required update rate, and we’ll confirm the right model and current lead time in writing. Browse the full catalog on our models page.