INJIE 4000BDR-L Binocular Long-Range Laser Rangefinder – 4000m
The newly upgraded INJIE 4000BDR-L Series binocular long-range laser rangefinder provides fast measurement, automatic focusing, precise distance calculation, and accurate average value computation. It also features powerful data storage capability.
Optional functions include azimuth measurement, Bluetooth connectivity, GPS (BeiDou) positioning, and inclination angle measurement. Compact, lightweight, and easy to operate, the device is widely used in river management, waterways, marker poles, telecommunications, cable installation, geological surveying, meteorology, airports, forestry, and other professional industries.
I. Product Features
High ranging accuracy up to ±0.5m
Distance gating function with adjustable minimum range channel
Average measurement function (AGV)
Standard RS232 serial port, optional Bluetooth connection for PDA and PC data transmission
Data storage and viewing capability
Data transmission, retrieval, and deletion functions
Optional GPS (BeiDou) positioning module
Advanced auxiliary functions including:
Distance gating
Average calculation
Data storage
Data transmission
Data retrieval
Serial number display
Reticle brightness adjustment
LCD backlight brightness adjustment
Application Fields
Power industry, industrial measurement, forestry, security, border defense, railway systems, geological exploration, construction engineering, outdoor hunting, camping, and mountaineering.
II. Technical Specifications
| Parameter | Specification |
|---|---|
| Laser Source | Nd:YAG |
| Wavelength | 1064nm |
| Output Energy | ≥5 mJ |
| Laser Lifetime | ≥4,000 shots |
| Measurement Range | 30 – 4,000m |
| Accuracy | ±0.5m |
| Distance Gating | 20 – 6000m (10m step) |
| Measurement Reliability | 98% |
| Repetition Frequency | 1/10 (6 times/min) |
| Receiving Aperture | Φ31mm |
| Field of View | 6.5° |
| Magnification | 7X |
| Operating Temperature | -40°C to +50°C |
| Environmental Protection | Dustproof, waterproof, shock-resistant |
| Dimensions | 60 × 130 × 139mm |
| Weight | 680g |
| Average Value Calculation | Supported |
| Data Storage | 10 records |
| Data Output | RS232 (115200, 8, N, 1) |
| Display | OLED with reticle illumination and brightness adjustment; auto power-off after 30 seconds of inactivity |
| Laser Lifetime Counter | Supported |
| Battery Capacity Display | Supported |
| Query Functions | Last 10 measurements, serial number inquiry, stored data inquiry |
| Power Supply | Polymer Li-ion battery (7.4V or 11.1V / 1000mAh), over 2000 measurements per full charge at room temperature |
III. Power Supply
The device uses a dedicated 7.4V or 11.1V / 1000mAh polymer lithium battery pack.
When low battery voltage is indicated, recharge or replace promptly.
To prevent injury or fire:
Do not allow metal objects to contact battery terminals.
Do not open the battery pack.
Keep the battery dry.
Do not expose the battery to fire (risk of explosion).
Use only the supplied dedicated charger.
Charging environment: 0°C – 40°C
Relative humidity: ≤80%
Improper use or low-quality chargers may damage the battery pack.
Note: For long-term storage, remove the battery from the rangefinder and store it separately in the protective case.
IV. Charger Instructions
Connect the charger to AC110–240V power supply. The blue indicator light will illuminate.
Insert the battery; the red indicator light indicates charging.
When fully charged, the red light turns off and the blue light remains on.
After charging, unplug the adapter from AC power first, then disconnect the output plug from the instrument.
Important: Always remove the battery from the rangefinder before charging to prevent device damage.
V. Tripod & Installation
For stable and reliable long-distance measurement:
Mount the unit on a tripod using the 1/4” threaded interface at the bottom.
Connect to various theodolites via the dovetail mount using a dedicated adapter.
Remote measurement can be performed through the external trigger cable.
VI. Packing List
Instrument case
Laser rangefinder
Charger
Battery pack
External trigger cable
Cleaning cloth
Quality certificate
Warranty card
User manual