KOKEN LTD.
Koken BL-7005 Bresslink

Manufacturer: KOKEN LTD.
Model: BL-7005
Breath-Link Series
Lightweight and High-Performance for Welding Operations
BL-7005
Starting April 2022, for indoor metal welding operations, the use of high-efficiency protective masks appropriate for the measured welding fume concentration will be required. Higher welding fume concentrations will necessitate masks with a higher assigned protection factor.
The BL-7005 is a high-end model suitable for welding operations requiring a protection factor up to 33.
Sakai Model
BL-7005
Includes battery and charger
Lightest PL2 model in the domestic market *Note 1
Assigned Protection Factor: 33
Extended filter life *Note 2
*Note 1: Among domestic PAPR (PL2 Model) products, released in June 2021 (based on company research).
*Note 2: Compared to the BL-1005-02 model.

Sakai Model
BL-7005AL
Includes battery and charger
Radiant heat reduction
Constructed with aluminum vapor deposition
A high-end model has been added to the 1005 series, which is highly popular in the welding industry.
Because it is an upgraded model based on the long-selling 1005 series, users transitioning to a powered air-purifying respirator can do so with confidence. (Sakai Model BL-7005)
Sakai Model BL-7005
The long-selling 1005 series known for ‘ease of use’ has now evolved with higher ‘performance’ and lighter weight.
5 Benefits of Breath-Link
Based on Breath Synchronized Blower System (BSFS) technology, it delivers air during inhalation and stops blowing during exhalation. This reduces fan noise, provides safety and comfort, and lowers operating costs.
- Lightest PL2 model in the domestic market (approx. 290g)
With high fan efficiency reducing battery size requirements, the use of a compact battery combined with the facepiece results in a lightweight product that is easy to wear for long periods without feeling heavy. - Extended filter life via new fiber structure
Compared to conventional filters, the new filter provides high collection efficiency (PL2) while allowing for longer continuous usage. - Long battery life
Reduced fan noise operation helps minimize battery consumption. - Natural breathing
Improves breathing dynamics during various tasks and reduces the discomfort of wearing a mask. It provides a natural breathing sensation as if not wearing a mask at least. - High safety
With a positive pressure design, it minimizes the ingress of dust and moisture into the facepiece, thereby increasing protective efficiency.

Other Features
- Use with welding mask: Can be used together with a welding mask and is compatible with welding surfaces.
- Voice: Allows voice transmission inside the mask and enables communication with others.
- Fit check: Enables quick checking of the mask’s seal using the integrated fit-testing kit.
- Notification: Notifies the battery replacement time through an “airflow conditioning” indicator.
- Silicone: Made of durable silicone with high heat resistance, providing comfortable wear.
- Auto on/off: The fan automatically starts when wearing the mask and breathing in, and automatically stops when the mask is removed.

Performance and Specifications
| Model Name (Product Code) | BL-7005 | BL-7005AL | |
|---|---|---|---|
| National Assay Certificate | No. TP122 | ||
| Head Harness | SB/SA Type | ||
| Applicable Filter | Mighty Micron Filter for BL-7005 | ||
| Classification | Fan Performance | Standard Airflow Type | |
| Inward Leakage Performance | Class A (Below 1.0%) | ||
| Filter Material Performance (Particle Collection Efficiency) | PL2 (99.0% or higher) | ||
| Model Name (Product Code) | BL-7005 | BL-7005AL | |
|---|---|---|---|
| National Assay Certificate | No. TP122 | ||
| Head Harness | SB/SA Type | ||
| Applicable Filter | Mighty Micron Filter for BL-7005 | ||
| Classification | Fan Performance | Standard Airflow Type | |
| Inward Leakage Performance | Class A (Below 1.0%) | ||
| Filter Material Performance (Particle Collection Efficiency) | PL2 (99.0% or higher) | ||
| Rated Operating Time※1 | Approx. 6.7 hours | ||
| Actual Operating Time※2 | Approx. 4 ~ 9 hours | ||
| Weight | Under 298g (Average 288g) | ||
| Battery | Dedicated Rechargeable Lithium-ion Battery (Rated Voltage: 3.7V – Rated Capacity: 1100mAh) | ||
| Recharge Cycles | Approx. 300 cycles※3 | ||
| Charging Time | Approx. 3 hours※3 | ||
| Electric Fan Durability | Approx. 2000 hours※3 | ||
※1: The duration positive internal pressure is maintained under standard national respiratory conditions during normal room operations.
※2: The duration positive internal pressure is maintained in a dusty environment, utilizing respiratory data from actual workers.
Information on Welding Masks
- New fume countermeasures based on specific revised regulations.
- How to select a new mask based on specific revised regulations.
- Recommended masks for each required protection factor, etc.
Note: Protective regulations to prevent health hazards caused by specific chemical substances.

- Product colors may slightly differ from actual colors due to printing or photography lighting.
- Product specifications and designs are subject to change without prior notice for continuous improvement.











