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Original operating instructions

Information about the operating instructions

About these operating instructions

  • Read these operating instructions before the product is used or operated for the first time. This is a prerequisite for safe, trouble-free handling and use of the product.
  • Observe the safety instructions and warnings in these operating instructions and on the product.
  • Always keep the operating instructions with the product and make sure that the product is accompanied by these operating instructions only, when the product is given to other persons.

Explanation of symbols used


Warnings alert persons to hazards that occur when handling or using the product. The following signal words are used:
  • Draws attention to imminent danger that will lead to serious personal injury or fatality.
  • Draws attention to a potential threat of danger that can lead to serious injury or fatality.
  • Draws attention to a potentially dangerous situation that could lead to personal injury or damage to the equipment or other property.

Symbols in the documentation

The following symbols are used in this document:
Image alternative Read the operating instructions before use.
Image alternative Instructions for use and other useful information
Image alternative Dealing with recyclable materials
Image alternative Do not dispose of electric equipment and batteries as household waste

Symbols in the illustrations

The following symbols are used in illustrations:
Image alternative These numbers refer to the corresponding illustrations found at the beginning of these operating instructions
Image alternative The numbering reflects the sequence of operations shown in the illustrations and may deviate from the steps described in the text
Image alternative Item reference numbers are used in the overview illustrations and refer to the numbers used in the product overview section
Image alternative This symbol is intended to draw special attention to certain points when handling the product.

Product-dependent symbols

Symbols on the product

The following symbols can be used on the product:
Image alternative The product supports near-field communication (NFC) technology compatible with iOS and Android platforms.

Product information

Image alternative products are designed for professional users and only trained, authorized personnel are permitted to operate, service and maintain the products. This personnel must be specifically informed about the possible hazards. The product and its ancillary equipment can present hazards if used incorrectly by untrained personnel or if used not in accordance with the intended use.
The type designation and serial number are printed on the rating plate.
  • Write down the serial number in the table below. You will be required to state the product details when contacting Hilti Service or your local Hilti organization to inquire about the product.
    Product information
    Line laser
    PM 2-LG
    Serial no.

Declaration of conformity

Image alternative
The manufacturer declares, on his sole responsibility, that the product described here complies with the applicable legislation and standards.
The technical documentation is filed here:
Hilti Entwicklungsgesellschaft mbH | Tool Certification | Hiltistrasse 6 | D-86916 Kaufering, Germany

Sticker on the product

Laser information
Image alternative Laser class 2 based on standard IEC60825-1 / EN60825-1:2014 and compliant with CFR 21 § 1040.10 and 1040.11 (Laser Notice 56).
Do not look straight into the laser beam.


General safety instructions, measuring tools

Image alternative WARNING! Read all safety precautions and other instructions. Measuring tools can present hazards if handled incorrectly. Failure to observe the safety instructions and other instructions can result in damage to the measuring tool and/or serious injury.
Keep all safety precautions and instructions for future reference.
Work area safety
  • Keep your workplace clean and well lit. Cluttered or poorly lit workplaces invite accidents.
  • Do not operate the product in explosive atmospheres, such as in the presence of flammable liquids, gases or dust.
  • Keep children and other persons clear when the product is in use.
  • Use the product only within its specified limits.
  • Comply with your national accident prevention regulations.
Electrical safety
  • Do not expose the product to rain or moisture. Penetrating moisture can cause short circuits, electrical shock, burns or explosions.
  • Although the product is protected against the entry of moisture, it should be wiped dry before being put away in its transport container.
Personal safety
  • Stay alert, watch what you are doing and use common sense when operating a measuring tool. Do not use a measuring tool while you are tired or under the influence of drugs, alcohol or medication. A moment of inattention while operating the measuring tool can result in serious personal injury.
  • Avoid unusual body positions. Keep proper footing and balance at all times.
  • Wear personal protective equipment. Wearing personal protective equipment reduces the risk of injury.
  • Do not render safety devices ineffective and do not remove information and warning notices.
  • Avoid accidental starting. Make sure that the measuring tool is switched off before connecting it to the battery and before picking it up or carrying it.
  • Use the product and accessories in accordance with these instructions and in the way specified for this special type of tool. Take the working conditions and the work to be performed into account. Use of products for applications different from those intended could result in hazardous situations.
  • Do not lull yourself into a false sense of security and do not flout the safety rules for measuring tools, even if you are familiar with the measuring tool after using it many times. Carelessness can result in serious injury within a fraction of a second.
  • Do not use the measuring tool in the vicinity of medical devices.
Using and handling the measuring tool
  • Use the product and accessories only when they are in perfect working order.
  • Store measuring tools out of reach of children when not in use. Do not allow persons who are not familiar with the product or these instructions to operate it. Measuring tools are dangerous in the hands of inexperienced persons.
  • Measuring tools need care and attention. Check that moving parts operate satisfactorily and do not jam, and make sure that no parts are broken or damaged in such a way that the measuring tool might no longer function correctly. Have damaged parts repaired before using the measuring tool. Many accidents are caused by poorly maintained measuring tools.
  • Do not under any circumstances modify or tamper with the product. Changes or modifications not expressly approved by Hilti may restrict the user’s authorization to operate the product.
  • Check the accuracy of the measuring tool before using it for important measurements, and if it has been dropped or subjected to other mechanical stresses.
  • Due to the measuring principle employed, the results of measurements can be negatively affected by certain ambient conditions. These include, for example, the proximity of devices that produce strong magnetic or electro-magnetic fields, vibrations and temperature changes.
  • Rapidly changing measuring conditions can falsify the results.
  • When the product is brought into a warm environment from very cold conditions, or vice-versa, allow it to become acclimatized before use. Big differences in temperature can lead to incorrect operation and incorrect results.
  • When adapters or accessories are used, make sure they are mounted securely.
  • The measuring tool is designed for the tough conditions of jobsite use, but as with other optical and electrical products (e.g. binoculars, spectacles, cameras) it must be handled with care.
  • The specified operating and storage temperatures must be observed.

Additional safety instructions for laser measuring tools

  • Laser radiation in excess of Class 2 can be emitted if the product is opened without correct procedure being followed. Have the product repaired only by Hilti Service.
  • Secure the area in which you will be taking measurements. While setting up the product, make sure that you do not direct the laser beam toward yourself or others. Laser beams should be projected well above or well below eye height.
  • Keep the laser exit window clean in order to avoid measurement errors.
  • Check the accuracy of the product before use and several times during use.
  • Readings taken in the vicinity of reflective objects or surfaces, through panes of glass or similar materials can falsify the result of measurement.
  • Mount the product on a suitable holder or bracket or on a tripod, or set it on a smooth, level surface.
  • Do not work with surveyor's staffs in the vicinity of high-voltage electricity cables.
  • Make sure that no other laser measuring tool that can influence your measurements is in use in the vicinity.
  • Do not permit the laser beam to project beyond the controlled area.

Additional safety instructions

  • Risk of injury by falling tools and/or accessories. Before starting work, check that installed accessories are secure.

Electromagnetic compatibility

Although the device complies with the strict requirements of the applicable directives, Hilti cannot entirely rule out the possibility of interference to the device caused by powerful electromagnetic radiation, possibly leading to incorrect operation. Check the accuracy of the device by taking measurements by other means when working under such conditions, or if you are unsure. Likewise, Hilti cannot rule out the possibility of interference with other devices (e.g. aircraft navigation equipment).

Laser classification for Class 2 laser products

The product corresponds to Laser Class 2 in accordance with IEC ⁄ EN 60825‑1:2014 and in accordance with CFR 21 § 1040 (FDA). This product may be used without need for further protective measures. Nevertheless, as with the sun, do not look directly into the light source. If you do inadvertently look into the laser beam, immediately close your eyes and move your head clear of the laser beam. Do not aim the laser beam at persons.

Careful handling and use of batteries

  • Remove the batteries from the product if it is to remain unused for a lengthy period of time. Batteries can corrode and self-discharge during prolonged storage.
  • Make sure that batteries are inaccessible to children.
  • Do not mix old and new batteries. Always replace all batteries at the same time. Do not mix batteries of different makes or types.
  • Do not use damaged batteries.
  • Use only the battery type intended for this product. Use of other batteries may create a risk of injury and fire.
  • When changing batteries, make sure that polarity is correct. There is a risk of explosion.
  • Do not allow batteries to overheat and do not expose them to fire. Batteries can explode and release toxic substances.
  • Do not attempt to charge non-rechargeable batteries.
  • Do not solder batteries into the product.
  • Do not discharge batteries by short-circuiting. Batteries can develop a leak, explode, catch fire and injure persons.
  • Do not damage batteries and do not attempt to take batteries apart. Batteries can develop a leak, explode, catch fire and injure persons.


Product overview

Image alternative
  1. Battery compartment
  2. Charge state indicator
  3. Receiver mode button
  4. Line mode button
  5. Laser exit window
  6. Mounting thread
  7. Selector switch for ON / OFF and lock / unlock pendulum
  8. Eye for attaching the retaining strap
  9. Position of rating plate

Intended use

The product described is a self-leveling line laser designed for leveling and alignment work. The line laser projects two green lines (horizontal and vertical) and one line intersection point. The line laser can be operated by one person. The lines and line intersection of the lines have a range of approx. 20 m (65 ft). Range depends on the brightness of ambient light. The product is designed for indoor use.
Possible applications are: leveling power outlets, cable trays, radiators and other items in installation work; leveling suspended ceilings; leveling and aligning doors and windows; transferring heights; vertical alignment of pipes.

Information displayed during operation

LED doesn’t light.
  • The tool is switched off.
  • The batteries are exhausted.
  • The batteries are inserted incorrectly.
LED shows continuously.
The laser beam is switched on. The tool is in operation. The batteries are fully charged.
LED quick-flashes.
The batteries are almost exhausted.
LED flashes.
Tool has switched off automatically, but the pendulum is not locked.
The laser beam flashes twice every 10 seconds (pendulum not locked) or every 2 seconds (pendulum locked).
The batteries are almost exhausted.
The laser beam flashes five times and then remains permanently on.
  • Automatic power-off has been deactivated.
  • Receiver mode has been activated or deactivated.
Laser beam flashes at high frequency.
The tool cannot level itself.
The laser beam flashes every 2 seconds.
Inclined line operating mode; the pendulum is locked, so the lines are not leveled.

Items supplied

Line laser, pouch, 4 AA batteries (not in all markets), operating instructions, manufacturer's certificate

Technical data

Range of the lines and intersection point without laser receiver
20 m
(65 ft - 10 in)
Range, lines and intersection point with laser receiver (depending on ambient brightness and receiver position relative to the laser)
2 m … 50 m
(6 ft - 10 in … 164 ft)
Self-leveling time
3 s
Self-leveling range (typical)
Accuracy at 10 m (33 ft)
±3 mm
(±0.1 in)
Line width (distance 5 m)
< 2 mm
(< 0.1 in)
Laser class
Class 2, visible, 510 - 530 nm, ±10 nm (IEC 60825-1:2014); class II (CFR 21 §1040.10 and 1040.11) (FDA)
Beam divergence, laser lines *180 °
0.05 ... 0.08 mrad
Average output power (max) (p)
< 1 mW
Wavelength (λ), ±10 nm
510 nm … 530 nm
Pulse duration (tp)
< 60 µs
Pulse frequency (f)
< 12 kHz
Power source
4x 1.5V AA battery
Battery life (typical), all lines on
at 24 °C (72 °F) : 10 h
Battery life (typical), only horizontal or vertical lines on
at 24 °C (72 °F) : 20 h
Automatic power-off (activated after)
1 h
Operating status indicator
LED and laser beams
Operating temperature
−10 ℃ … 40 ℃
(14 ℉ … 104 ℉)
Storage temperature
−25 ℃ … 63 ℃
(−13 ℉ … 145 ℉)
Dust and water spray protection (except battery compartment)
IP 54 in accordance with IEC 60529
Tripod thread
UNC 1/4"
Dimensions length x width x height
66 mm x 116 mm x 103 mm
(2.6 in x 4.6 in x 4.1 in)
Weight with foot and including batteries
600 g
(21.2 oz)


Inserting/changing batteries

  • Make sure that battery polarity is correct.
  • Changes all the batteries at the same time.
  • Use only batteries that have been manufactured in accordance with international standards.
Image alternative
  1. Flip the battery compartment open.
  2. Remove the spent batteries, if applicable.
  3. Insert the new batteries.
  4. Close the battery compartment.

Fall arrest

Risk of injury by falling tool and/or accessory!
  • Use only the Hilti anti-fall cable recommended for your product.
  • Prior to each use, always check the anti-fall cable and the attachment points of the anti-fall cable for possible damage.
Comply with the national regulations for working at heights.
As drop arrester for this product, use only the Hilti PMA 92 anti-fall cable.
  • Secure the anti-fall cable to the laser and to a load-bearing structure. Check that it holds securely.
    Comply with the operating instructions of the Hilti anti-fall cable.

Switching the laser beams on

  1. Set the selector switch to the Image alternative position (ON / unlocked).
    • All laser lines and all points are switched on.
  2. Press the line mode button repeatedly until the desired line mode is set.
    • The product repeatedly cycles through the operating modes in the following sequence: all lines, horizontal line, vertical line.

Setting the laser beam for the "Inclined line" function

  1. Set the selector switch to the Image alternative position (ON / locked).
    • The horizontal line is switched on.
  2. Press the line mode button repeatedly until the desired line mode is set.
    • The product repeatedly cycles through the operating modes in the following sequence: horizontal line, vertical line, all lines.
    When the "Inclined line" function is active, the pendulum is locked and the laser is not leveled.
    The laser beam(s) flash every 5 seconds.

Switching the laser beams off

  1. Set the selector switch to the OFF position.
    • The laser beam is switched off and the pendulum is locked.
Risk of injury by unintended starting!
  • Before inserting the battery, make sure that the product is switched off.
  1. The laser beam is switched off automatically when the battery is low.

Examples of applications

Transferring heights

Image alternative

Aligning drywall tracks

Image alternative

Aligning overhead lights

Image alternative

Aligning pipes

Image alternative

Aligning heating units

Image alternative

Aligning door and window frames

Image alternative

Activating or deactivating laser receiver mode

The range of the laser receiver might be restricted on account of the design-related asymmetry of the laser power and possible disruptive external light sources.
To optimize the range, work on the strong side of the line laser and avoid working in direct light. The strong side is the front of the line laser.
  1. To activate the receiver mode, press the receiver mode button.
    • The laser beam flashes five times as confirmation.
    • The LED beside the receiver-mode button shows green.
    • The visibility of the laser beams diminishes.
  2. Press the receiver mode button again to deactivate the receiver mode.
    • The LED beside the receiver-mode button goes out.
    • The visibility of the laser beams increases back to normal level.
    Receiver mode is deactivated when the laser is switched off.


Checking the leveling of the laser beam

Image alternative
  1. The distance between the walls must be at least 10 m.
  2. Set the laser on a flat, horizontal surface approx. 20 cm from wall (A) and project the point of intersection of the laser lines on to wall (A).
  3. Mark the point of intersection of the laser lines with a cross (1) on wall (A) and with a cross (2) on wall (B).
  4. Place the laser on a flat, horizontal surface approx. 20 cm from wall (B) and project the point of intersection of the laser lines on to cross (1) on wall (A).
  5. Adjust the height of the point of intersection of the laser lines so that the point of intersection coincides exactly with mark (2) on wall (B). Use a tripod or a wall mount if necessary.
  6. Mark the point of intersection of the laser lines again with a cross (3) on wall (A).
  7. Measure the offset D between crosses (1) and (3) on wall (A) (RL = room length).
Image alternative
  1. Calculate the value R.
    • The value R should be less than 3 mm (1⁄8).
  2. If the result is out of tolerance, consult Hilti Service.

Checking the accuracy of the horizontal line

Image alternative
  1. Place the tool at the edge of a room that is at least 10 m in length.
    The floor surface must be smooth and horizontal.
  2. Switch all the laser beams on and make sure that the pendulum lock is disengaged.
  3. Make a mark at a distance of at least 10 m from the tool, so that the point of intersection of the laser lines coincides with the center of the mark (d0) and the vertical line of the mark runs exactly through the middle of the vertical laser line.
  1. Pivot the tool 45° clockwise, as viewed from above.
Image alternative
  1. Then mark the point (d1) on the mark where the horizontal laser line coincides with the vertical line of the mark.
  2. Pivot the tool 90° counter-clockwise.
  3. Then mark the point (d2) on the mark where the horizontal laser line coincides with the vertical line of the mark.
  4. Measure the following vertical distances: d0-d1, d0-d2 and d1-d2. Determine the largest difference (dmax) and the smallest difference (dmin).
  5. For d0-d1, d0-d2 and d1-d2 the following applies:
Image alternative
  1. The largest vertical measured distance must be no greater than 5 mm at a working distance of 10 m.
    • dmax-dmin = distance between the highest mark and the lowest mark in millimeters/¹⁄₁₀ inch
    • D = distance between the tool and the mark in meters/feet

Checking the accuracy of the vertical line

This check requires a doorway or similar opening with a clear height of at least 2 m. At least 2.5 m space on each side is also needed.
Image alternative
  1. Switch the tool on and make sure that the pendulum lock is disengaged.
  2. Place the tool on the floor at a distance of 2.5 m from the door opening and align the vertical line with the middle of the doorway.
  3. Mark the middle of the vertical line on the floor (1) and the top edge of the doorway (3) and on the floor at a distance of 2.5 meters past the doorway (2).
Image alternative
  1. Place the tool immediately behind point (2) on the floor and align the laser beam to pass through points (2) and (1).
  2. The deviation between the laser line and point (3) can be read off directly at the top edge of the doorway. This value corresponds to the deviation at twice the height.
  3. Measure the height of the doorway.
  4. The maximum permissible deviation is 3 mm per 10 m of height.
Image alternative
  1. For the deviation obtained by the above method, the maximum permissible deviation is as follows:
  2. The maximum permissible calculated deviation in millimeters must be less than 0.3 mm/m multiplied by twice the height in meters.
    • d = twice the measured deviation in millimeters/ ¹⁄₁₀ inch
    • H = doorway height in meters

Dealing with deviations

  • If you find that deviations occur, consult Hilti Service.

Care and maintenance

Care of the product
  • Carefully remove stubborn dirt.
  • Blow dust off the laser exit window. Do not touch the laser exit window with your fingers.
  • Use only a slightly damp cloth to clean the housing. Do not use cleaning agents containing silicone as these can attack the plastic parts.
  • Check all visible parts and controls for signs of damage at regular intervals and make sure that they all function correctly.
  • Do not use the product if signs of damage are found or if parts malfunction. Immediately have the product repaired by Hilti Service.
  • After cleaning and maintenance, install all guards and protective devices and check that they are in full working order.
To help ensure safe and reliable operation, use only genuine Hilti spare parts and consumables. Spare parts, consumables and accessories approved by Hilti for use with your product can be found at your Hilti Store or online at:

Hilti Measuring Systems Service

Hilti Measuring Systems Service checks the scanning tool and, if deviations from the specified accuracy are found, recalibrates it and rechecks to ensure conformity with specifications. The service certificate provides written confirmation of conformity with specifications at the time of the test. The following is recommended:
  • Choose a test/inspection interval that matches usage of the device.
  • Have the product checked by Hilti Measuring Systems Service after exceptionally heavy use or subjection to unusual conditions or stress, before important work or at least once a year.
Testing and inspection by Hilti Measuring Systems Service does not relieve the user of the obligation to check the scanning tool before and during use.

Transport and storage

  • Prior to each use and before and after prolonged transport, check the product for damage.
  • Store the product and the batteries in a cool and dry place. Comply with the temperature limits stated in the technical data.
  • Never leave the product or batteries in direct sunlight, on sources of heat, or behind glass.
  • Store the product and batteries where they cannot be accessed by children or unauthorized persons.
  • Prior to each use and before and after prolonged storage, check the product for damage.


If the trouble you are experiencing is not listed in this table or you are unable to rectify the problem by yourself, contact Hilti Service.
Possible cause
Action to be taken
The product cannot be switched on.
Battery is empty
  • Replace the batteries.
Battery polarity incorrect
  • Insert the batteries correctly.
Battery compartment is not closed
  • Close the battery compartment.
Product or on/off switch is faulty
  • Contact Hilti Service.
Individual laser beams don’t function.
Laser source or laser control unit is faulty
  • Contact Hilti Service.
Product can be switched on but no laser beam is visible.
Laser source or laser control unit is faulty
  • Contact Hilti Service.
Temperature is too high or too low
  • Allow the product to cool down or warm up.
Automatic leveling doesn’t work.
Product set up on an excessively inclined surface
  • Set the product on a flat, horizontal surface.
Pendulum is locked
  • Release the pendulum.

Manufacturer’s warranty

  • Please contact your local Hilti representative if you have questions about the warranty conditions.

Further information

Accessories, system products and more information about your product can all be found here.

Restriction of Hazardous Substances
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This table is valid for the China market.
Restriction of Hazardous Substances
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This table is valid for the Taiwan market.


Image alternative Most of the materials from which Hilti tools and appliances are manufactured can be recycled. The materials must be correctly separated before they can be recycled. In many countries, your old tools, machines or appliances can be returned to Hilti for recycling. Ask Hilti Service or your Hilti representative for further information.
Image alternative
  • Do not dispose of power tools, electronic equipment or batteries as household waste!