Laser therapy device for the treatment of dogs, cats and horses
Handy low-level laser therapy device with 400 mW power and a wavelength of 808 nm. The Personal-Laser L400 is one of the smallest low-level lasers on the market. Equipped with a powerful Li-Ion battery, it ensures a long treatment time.
The L400 is an effective and powerful all-purpose laser, specially developed for the treatment of pain and injuries in horses, dogs and cats. The laser wavelength of 808 nm ensures effective penetration into the skin and tissues. Treatment depth: approx. 3-4 cm.
What makes the PERSONAL-LASER™ L400 a good choice?
The PERSONAL-LASER ™ L400 is the big brother of the L200 and the most powerful PERSONAL-LASER for private use. With a laser power of 400mW at a wavelength of 808 nm (invisible / infrared), it covers all important areas of application.

The L400 is significantly more powerful than its little brother L200 and thus ensures a deeper penetration of the laser light into the skin, muscles, tendons and joints. The higher power also reduces treatment times. The L400 is particularly well suited for the treatment of deeper wounds and injuries.
Here are a few basic properties attributed to laser light:
- Stimulation of cellular metabolism
- ATP production
- Local concentration of lymphocytes, leukocytes and macrophages
- Improved blood circulation
- Stimulation of collagen production
- Improved oxygen uptake by the cells - Normalization of the Na-K pump - Normalized cell membrane potential
The laser light generated by the L400 is monochromatic (one wavelength), coherent (all photons move in the same phase and direction) and collimated (minimal divergence/spreading of the laser beam over a distance). These three properties allow the therapy laser light to be focused on a specific area of the body.
It also penetrates deep tissues without heating or damaging them. With only very few side effects, the laser beam can thus interact with the tissue.

The optimal wavelength range for LLLT / PBM (photobiomodulation) applications ranges from 600nm to approx. 1000nm. It is also known as the "biological window". At longer wavelengths, the laser beam penetrates deeper into the tissue. At the same time, absorption by the animal's hair and skin pigment is minimized.
Shorter wavelengths are used for the treatment of superficial wounds and joint injuries. Longer wavelengths are better suited for the laser therapy of muscle and tendon injuries.
The difference between LEDs and laser diodes
There are different veterinary lasers on the market that are sold for use in animal physiotherapy. LED devices are often found that are referred to as laser therapy devices, but differ in some respects from "real" lasers such as the Personal Laser L400.
The abbreviation LED stands for "Light-emitting Diode". A diode that emits light when electricity flows through it, often in many different colors. The word LASER, on the other hand, stands for "Light Amplification by Stimulation of Emitted Radiation". A light source is first amplified in a medium and then emitted in a special, subsequently described manner.
A real veterinary laser is monochromatic. This means that the light produced by this laser has a single, very specific wavelength. LEDs can also produce monochromatic or nearly monochromatic light. However, only real lasers such as the L400 concentrate all their power on a small point. The laser light is coherent (see figure) and coherent light can be transmitted over much greater distances than incoherent light.
LEDs distribute their power over a larger area during application, but without achieving greater penetration into the tissue, as is possible with the Personal Laser L400.
Calculation of laser dosage and energy density
An important factor in laser therapy for animals is the calculation of the appropriate energy density, depending on the disease/injury. To calculate the energy density, the units are converted, which means the laser power in mW is converted to watts. For the L400, this is then 0.4 watts.
Power, energy and time are related, with power being the rate of energy delivery over time. The energy delivered by a laser can be calculated by multiplying the laser power by the duration of the treatment. For the L400, this is at a treatment duration of 4 min.
Energy (delivered dose) = Power x Time = 0.4W x 240s = 96 Joules (J)
For performing a laser treatment on animals, energy density is an important factor. To calculate it, the delivered energy (J) is divided by the area in square centimeters.
Energy density = Energy/Area (J/cm²)
Power unit = Watts (W)
Area = cm2
Energy = Joules (J)
Energy density = Joules per square centimeter (J/cm²)
Calculation of energy density
| Area | Energy | Energy density |
| 100cm² | 96J | 0.96J/cm² |
| 10cm² | 96J | 9.6J/cm² |
| 1cm² | 96J | 96J/cm² |
LLLT Laser Treatment Technique
The laser treatment should be performed directly on the skin, preferably not through thick fur, as this can absorb part of the laser light.
To ensure effective laser application, several things should be considered:
- Whether the point or scan treatment technique is used, the Personal Laser should be worked with skin contact as much as possible. This can eliminate energy loss of the laser beam due to reflection from the skin. This allows more energy to penetrate into the tissue.
- The laser should be held perpendicular to the treatment area. Otherwise, light energy can also be lost through the deflection and reflection of the beam.
- When light pressure is applied to the skin with the L400 laser, part of the blood supply in the treatment area is suppressed. This reduces the absorption of the laser energy by hemoglobin and oxyhemoglobin in the blood.
Scan Treatment Technique
The scan technique is one of 3 treatment variants that can be performed with the L400 veterinary laser. The scan technique is used for the surface treatment around the treatment area, for the treatment of larger areas (bite wounds, eczema, psoriasis, etc.) and especially for the treatment of areas with dark, heavily pigmented skin, dark hair follicles or dark fur.
The laser optics are pressed lightly into the skin in the scan technique. The laser is then moved in circular or rectangular motions over and around the treatment area.
Point Treatment Technique
In point treatment, the laser is moved from point to point as shown in the image, with a distance of 1 - 2 cm between the individual points. The laser then dwells on each point for the time specified in seconds in the veterinary dosage recommendation.
When treating bite wounds and eczema with the laser, the laser should be held at a distance of approx. 1cm from the skin. Only when the area just outside the open wound is reached can the laser optics be pressed lightly again.
Treatment of Wounds
Bite wounds or other open skin areas should only be treated along the wound edges with skin contact of the laser optics (4J/cm²). Either the point or scan technique can be used here. Inside the wound, it should be treated without skin contact of the optics (0.5-1J/cm²). The laser optics of the L400 laser are held approx. 1 cm above the wound for this purpose and then can be treated with point or scan technique.
Deactivation of the Signal Tone
During treatment, a signal tone sounds every 10 seconds for time orientation. For some applications, such as in the ear area or with skittish animals, a permanently muted device is often preferred. This adjustment can be made directly at the factory. If you need a laser without sound, simply leave us a corresponding note when ordering. You will then receive a device with factory-deactivated sound. The delivery time is therefore extended by 1 to 3 business days. To reactivate the sound at a later time, the laser must be sent back to the manufacturer.
Test First, Then Buy! Are you still unsure and want to try out the laser first? For a rental fee, we will send you the Personal Laser L400 for 1-4 weeks. If you buy a laser from our range at the end of the rental, the rental fee will be credited by 50%.
Scope of Delivery
You can choose the standard version with a treatment laser safety goggles. Optionally, you can choose the version with a treatment and three animal laser safety goggles. With this version, you will also receive 3 laser safety goggles for animals in three different sizes.
Interesting Articles and Information
1. Laser dosage and treatment frequency for different diseases.
2. Laser therapy in veterinary medicine – Properties, Effects, Safety
Notice for buyers
This device is intended exclusively for commercial or professional use. The operation of Class 3R, 3B and 4 laser equipment is subject to specific protective and organizational requirements; in particular, the applicable occupational health and safety regulations, safety measures and training requirements must be observed. Sale to and use by private individuals as consumers are not intended.
* Please schedule an appointment with us after receiving the product.
Do you have any questions about the item Personal Laser L400 - Laser therapy for animals? Feel free to contact us by phone at 05561 3108680 or via the contact form.