Laser Distance Meter DP20 Series Quick Start
Product Overview
Thank you for purchasing Mileseey Laser distance meter. Please read the user manual carefully before operation.
The DP20 series is an exquisite bilateral laser distance measurer whose exterior redefines the concept of design—the cleverly designed buttons render an appearance as simple as a ruler. With built-in upgraded and patented distance-measuring technology that enable more accurate data of measurement, it meets various measurement needs of people engaged in house renovation, house decoration, interior design, exhibition design, outdoor advertising design, crafting, home soft furnishing and more.
Made of aviation aluminum alloy, the DP20 series is characterized by its elegance, smoothness, and durability. The user-favored multiple buttons with logical layout enables quick and easy operation. HD back-lit OLED display illuminates numbers and signs with a distinct resolution. The digital angle sensor allows real-time reading of the measurement angle and easy horizontal alignment. Thanks to the built-in large capacity 1000mAh rechargeable Li-ion battery, DP20 series is a more eco-friendly device with a long using life span.
DP20 series carries an expansive collection of functions - real-time angle display, single measurement, continuous measurement, area measurement, volume measurement, auto level distance calculation, auto height finding. The DP20 Pro supports both unilateral and bilateral measurements, and the bilateral measurement overcomes restrictions of irregular spatial structures, enabling exceptionally efficient and precise distance calculation under complex spatial conditions. The smallest unit that the device is capable of measuring is 0.001m and the longest measurement range is up to 120m (394ft) in the two-way mode of measuring. The DP20 series affords an outstanding measuring experience with the best quality and performance!
⚠️ Safety Instructions
In order to use this product safely, please read The following instructions carefully.
[EN-01]
Product Appearance
The device features a USB Port for power charging (Type-C), Laser Emitting Lenses, and Laser Receiving Lenses on both ends. The front panel includes a Display screen and multiple buttons.
Button Layout:
- 1. Right Laser On/Off Button: Long press to turn on/off the right side laser. Short press to page down to historical data.
- 2. Middle Laser Marking On/Off Button: Long press to turn on/off the laser marking.
- 3. Left Laser On/Off Button: Long press to turn on/off the left side laser. Short press to page up historical data.
- 4. Off/Clear Button: Long press to turn off the device. Short press to clear the previous operation or return.
- 5. Units Switch/Mute Button: Short press to switch units (m/ft/in/''). Long press to turn on/off beep tone.
- 6. Mode Button: Short press to switch between measurement functions - single measurement, area measurement, volume measurement, auto level distance measuring, and auto height finding.
- 7. Line segmentation&measuring: Short press to enter segmentation mode. In segmentation mode, short press to set segmenting value from 1/2 to 1/16.
- 8. Extra-Large Display/Bluetooth Sync: Short press to switch to extra-large display. Long press to turn on/off Bluetooth (Only available on DP20pro Version).
- 9. On/Measure Button: In off state, long press to turn on. Short press to measure. In on state, long press to enter continuous measurement.
- 10. Memory Button: Short press to save the data. Long press to enter history data saved.
The device also includes a Lanyard Hole and a 1/4" Screw Hole For Tripod.
[EN-03]
[EN-04]
Technical Specification
| Model | DP20 | DP20 Pro |
|---|---|---|
| Range(M) | 0.25~80m | 0.25~120m |
| Accuracy(MM) | ±(2.0mm+5x10⁻⁵D) | |
| One way Available Range:(m) | 0.25~40m | 0.25~60m |
| Two-way Measure | ✔️ | ✔️ |
| One-way Measure | ✔️ | ✔️ |
| Segmentation (1/N Length) | ✔️ | ✔️ |
| Middle Laser Mark Beam | ✔️ | ✔️ |
| Bluetooth | ❌ | ✔️ |
| Single Measurement | ✔️ | ✔️ |
| Continuous Measurement | ✔️ | ✔️ |
| Area | ✔️ | ✔️ |
| Volume | ✔️ | ✔️ |
| Auto level distance finding | ✔️ | ✔️ |
| Auto height finding | ✔️ | ✔️ |
| Angle sensor | ✔️ | ✔️ |
| Extra-large Display Mode | ✔️ | ✔️ |
| Screen Display | OLED | |
| Memory | 20sets | |
| Reference | Two-way measurement-Middle Laser Mark Beam | One-way measurement-Rear |
| Units | m/ft/in/ft+in | |
| Auto Power Switch-off | After 180s of inactivity | |
| Laser Class | Class 2 | |
| Laser Type | 630-670nm, <1mW | |
| Battery Type | 1000mAh rechargeable Li-ion battery | |
| Operating Temperature | 0°C~+40°C (32°F~+104°F) | |
| Dimension(mm) | 160*42*20.5mm | |
| Weight (g) | 150g | |
Notes on Specifications:
1. Range: Range data are referenced to the rear of the measurer. The Maximum range shall be different according to different modes. Please refer to the package for actual range.
2. Accuracy: If measuring under favorable conditions, such as smooth surface, proper temperature and indoor lighting, the device is able to work within certain range as indicated. If measuring under unfavorable conditions, such as strong light, uneven surface and improper temperature, Possible measurement error might be produced.
Tips: In case of poor sunlight and bad reflection of the object, please use the target plate or reflector.
[EN-05]
Operation Instructions
Measurement Reference
When initially turned on, the device defaults into the single measurement mode in both directions. Long press [◀️] to turn off the left laser and long press [▶️] to turn off the right laser.
For bilateral lasers, with the marker laser as the reference.
Diagram description: Visual representation showing the device emitting lasers from left and right, with a central marker laser acting as the reference point for bilateral measurements.
Automatic switch to rear reference in case of one-way measurement.
Diagram description: Visual representation showing a device emitting a laser from the rear for one-way measurement, with the laser beam extending forward.
Note: After rebooting, the reference setting in last booting remains saved.
Two-way Measurement
Press the [MODE] button to enter Two-way single measurement mode [ ]. Press the [MEASURE/ON] button after aiming at targets to get distances. The left side length, right side length, and total length are displayed on the screen.
Diagram description: A schematic view of the device positioned between two targets, with lasers extending to each target, illustrating the setup for two-way measurement.
Screen display example: Shows "Left Side Data", "Right Side Date", and "Total Length" with corresponding numerical values.
[EN-06]
One-way Measurement
In the mode of two-way single measure [ ], long press [◀️] button to turn off the left side distance measuring laser, or long press [▶️] button to turn off the right side distance measuring laser, which switches two-way to one way mode. Press [MEASURE/ON] button after aiming at target to get distance.
Diagram description: A device emitting a single laser beam towards a target, indicating one-way measurement. The screen displays measured data and angle.
Screen display example: Shows "Reference", "Measured Data", and "Angle" with numerical values.
Continuous Measurement
Long press [MEASURE/ON] button to enter continuous measurement. The device begins to continuously measure. Press [MEASURE/ON] button to stop the continuous measurement; then the screen displays the current maximum and minimum values.
Diagram description: A device emitting multiple laser beams towards a target, illustrating continuous measurement. The screen shows fluctuating readings.
Screen display example: Shows "Min." and "Max." values with corresponding measurements.
[EN-07]
Line segmentation&measuring
Long press [1/N] button to enter line segmentation&measuring mode [ ]. Short press [1/N] or [+/-] buttons to set the stake out value from 1/2 to 1/16. The measured values are moving to the left or right with the indicated arrows. When moving to the target position, the N/N segment appears at the bottom middle of the screen, this indicates an approach to the target position. When [ ] flashes and ticks at the top centre of the screen, this indicates that the target position has been reached. Press the [MEASURE/ON] button to lock the current position.
Diagram description: A visual showing a device projecting lasers onto a surface, with indicators for segmentation and target lock. It depicts setting out values like 4/5 or 5/5.
Screen display example: Shows "Laser Marking Icon", "Left/Right Values", and "N/N" status.
Area Measurement
Press the [MODE] button to select Area Measurement Mode [ / ]. Then press the [MEASURE/ON] to confirm. According to the flashing line prompt, press [MEASURE/ON] button to get the distance of the first line (Length), and press the [MEASURE/ON] again to get the distance of the second line (Width); then the area value is displayed on the screen.
Note: Press [◀️/▶️] to cycle through the length, width, and the circumference values.
Diagram description: A visual showing a device measuring two perpendicular lines to calculate an area. The screen displays the calculated area.
Screen display example: Shows "Reference", "The Length of Second Line (Width)", and "Area" with numerical values.
[EN-08]
Volume Measurement
Press the [MODE] button to select Volume Measurement Mode [ ]. Then press the [MEASURE/ON] to confirm. According to the flashing line prompt, press [MEASURE/ON] button to get the distance of the first line (Length), and press the [MEASURE/ON] to get the distance of the second line (Width), then press [MEASURE/ON] again to get the distance of the third line (Height); then the volume value is displayed on the screen.
Note: Press [◀️/▶️] to cycle through the length, width, and height measurement values.
Diagram description: A visual showing a device measuring three perpendicular lines (length, width, height) to calculate a volume. The screen displays the calculated volume.
Screen display example: Shows "Reference", "The Length of Third Line (Height)", and "Volume" with numerical values.
Auto Level
Press [MODE] button to select Auto Level Measurement Mode [ ]. Then press [MEASURE/ON] to confirm. According to the flashing line prompt, press [MEASURE/ON] button to measure, and the hypotenuse length will be displayed on the screen, and then the horizontal distance will be calculated, and the tilt angle will be also displayed on the screen.
Note: Press [◀️/▶️] to cycle through the tilt angle, the hypotenuse length, and the horizontal distance.
Diagram description: A visual showing a device measuring a slope, calculating the hypotenuse length, horizontal distance, and tilt angle (α).
[EN-09]
Auto Height
Press [MODE] button to select Auto Height Measurement Mode [ ]. Then press [MEASURE/ON] to confirm. According to the flashing line prompt, press [▶️] button to get the length of the first line, and press the [MEASURE/ON] again to get the length of the second line; then the vertical distance between the two points will be displayed on the screen.
Notes: 1. The auto height function can only be used in one-way laser measurement. 2. Press [◀️/▶️] to cycle through the angle between two lines, the length of first line, and the length of the second line.
Diagram description: A visual showing a device measuring the height of an object indirectly by measuring two lines from different points, calculating the vertical distance.
Screen display example: Shows "Reference", "Angle", and "Vertical Height" with numerical values.
Memory
Short press [MEMORY] button to save the current data. Long press [MEMORY] to enter the memory; press [◀️/▶️] to turn on the previous and next page, and press [⬆️] button to go through the current history of measurement sides or angles; then press [CLEAR/OFF] button to exit the history. The saved measurement result data will be displayed from the most recent time to the furthest time.
Note: 20 sets of measurement results can be saved.
[EN-10]
Extra-large Display Mode
Short press the [T/T] button to switch into Extra-large Display Mode, and press the [T/T] button again to exit the extra-large display mode.
Note: The extra-large display mode can only be applied in a single measurement.
Screen display example: A large, clear numerical value with its unit.
Bluetooth Connection (Only available on DP20pro Version)
Measuring Device:
Long press [T/T]; Bluetooth will be successfully connected when [⬆️⬇️] appears.
Diagram description: A visual representation of the device's screen showing a Bluetooth icon and connection status indicators.
Smart Phone End:
Turn on the Bluetooth on your phone, and click on the Bluetooth connection in the APP. After successful connection, the Bluetooth icon on your phone turns blue and [⬆️⬇️] will be displayed at the top right-hand corner on screen. Then, we can control the device remotely through the APP for measurement and data transfer. The Bluetooth function needs to be used in conjunction with the mobile phone APP, so users need to download the "Smart Life" APP in advance.
[EN-11]
APP Download
Step 1: Scan code
Description: QR code for app download. Scanning this code will lead to the app download page.
Step 2: Jump to the App Market
Users can access the app stores via provided links for Google Play or the App Store.
Step 3: Search and install "Smart Life"
Description: Screenshot showing the "Smart Life" app in the app store search results, ready for installation.
Step 4: Open the APP to connect the device
Description: Screenshot of the "Smart Life" app interface, guiding users on how to connect the laser distance meter.
Error Code
All errors or failures will be shown as codes. The following table explains the meaning of codes and solutions.
| Code | Cause | Corrective Measure |
|---|---|---|
| 204 | Calculation error | Refer to user manual, repeat the procedures. |
| 208 | Excessive current | Please contact your distributor. |
| 220 | Low battery | Replace batteries or charge the batteries. |
| 255 | Received signal too weak or measuring time too long | Change target surface. |
| 256 | Received signal too strong | Change target surface. |
| 261 | Out of the range of measurement | Select the measurement-distance within the range of measurement. |
| 500 | Hardware error | Switch on/off the device several times. If the symbol still appears, please contact your dealer for assistance. |
[EN-12]
