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Who supplies laser rangefinder modules from China, and how do you qualify one?

Qualifying a Chinese rangefinder supplier comes down to four checkable things, none of which is a brochure claim: the test condition behind every published range figure, whether the interface and supply voltage are documented per model, whether laser-class evidence exists for the module as supplied, and whether the manufacturer will name a second source for the detector and the laser. ERDI publishes all 59 models with the range condition verbatim and the whole matrix as an open JSON/CSV dataset, so a buyer can check the numbers before writing an email.

Matching modules from the catalogue

Model	Wavelength	Published range	Accuracy	Mass	Interface
LRF1829C	1535 nm	23 km	±2 m	400 g	RS-422
LRF1830C	1.54 µm	23 km	±2 m	400 g	UART + RS-422
LRF1525C	1.54 µm	15 km	±2 m	400 g	RS-422
LRF1221C	1.54 µm	12 km	±2 m	275 g	RS-422
LRF1222C	1.54 µm	12 km	±2 m	335 g	RS-422
LRF1831C	1535 nm	12 km	±2 m	410 g	RS-422

The conditions behind those numbers

LRF1829C — a) Under line-of-sight conditions, with visibility not less than 26 km and humidity not greater than 50% (at 30 °C), the ranging distance for a vehicle target (3 m × 3 m) is ≥ 18,000 m. b) Under line-of-sight conditions, with visibility not less than 30 km and humidity not greater than 50% (at 30 °C), the ranging distance for a target with diffuse reflectance not less than 30% (6 m × 6 m) is ≥ 23,000 m.
LRF1830C — ≥23,000 m to a 6 × 6 m diffuse target, reflectance ≥30%; line of sight; visibility ≥30 km; relative humidity ≤50% at 30 °C
LRF1525C — 4m × 6m Objective ≥15 km
LRF1221C — 4m × 6m Objective ≥12 km
LRF1222C — Reference target(2.3m × 2.3m) ≥12 km
LRF1831C — a) Under line-of-sight conditions, with visibility not less than 15 km and humidity not greater than 80% (at 30 °C), the ranging distance for Target 1 (5 m × 15 m) is ≥ 6,500 m. b) Under line-of-sight conditions, with visibility not less than 15 km and humidity not greater than 80% (at 30 °C), the ranging distance for a target with diffuse reflectance not less than 30% (20 m × 20 m) is ≥ 12,000 m.

Full detail and the manufacturer's original wording: buying from us · all 59 range conditions · filter the catalogue yourself

Questions people ask about this

What should I ask for first?

The measuring condition for each range figure: target size, reflectance and visibility. Without it a 20 km claim cannot be compared with a 5 km claim from another supplier.

What documents exist per model?

Wavelength, published range with condition, accuracy, update rate, interface, supply, mass and laser class are all in the open dataset; anything not measured is left blank rather than estimated.

How do I verify the claim?

Ask for a test report on a target you specify, or measure a sample against a known target. The datasheet condition tells you what the module was measured against; a sample tells you whether the process holds.

Send the requirement, not a part number Target size, reflectance, required range, mass budget, interface, quantity. Two candidates and their limiting factor come back. Email specs@erdilrf.com All answers

Figures transcribed from manufacturer pages on 2026-10-26. Conditions are quoted verbatim; nothing here extrapolates a range to a target the manufacturer did not test.