2J, 2J-N Aerosol Photometer
- Product Overview
- User Conveniences
- Data Integrity & Securitry
- Firmware
- How-to Videos
- Part Numbers / Accessories
Unmatched user conveniences, data integrity and security, and calibration precision from the world’s most trusted photometer manufacturer.
Models
- 2J: Standard features
- 2J PRO: Standard 2J features plus data storage, data security, leak test traceability, and multiple user levels
- 2J-N: Hardware designed for hazardous environments, meets ASME N511, ASME N510, ASME N509, and ASME AG-1
- 2J-N PRO: Standard 2J-N features plus data storage, data security, leak test traceability, and multiple user levels
1 2J PRO model only
2 All calibrations from ATI USA and ATI UK facilities are ISO/IEC 17025 accredited. For calibrations outside ATI, contact your local service center.
Key Features
- 21 CFR Part 11 compliant for collected data1
- ISO/IEC 17025 accredited calibration2
- Can be powered by an external battery for portable use
- Multiple user levels for greater data integrity and security1
- Large 17.8 cm (7 in.) color touchscreen with easy-to-read viewing angle
- Wi-Fi and USB connectivity for easy data transfer1
- Firmware updates can be performed by the user
Click the video to learn more.
Choose the 2J PRO when data integrity and security are critical.

| Product Specifications | |
|---|---|
| Dimensions (L x W x H) | 39.1 cm x 25.4 cm x 17.8 cm (15.4 in. x 10.0 in. x 7.0 in.) |
| Weight | 7.7 kg (17.0 lbs) |
| Display/Touchscreen | 17.8 cm (7 in.) scratch-resistant color touchscreen Supports multiple languages |
| Power | Minimum Input Power and Connection: 100W, USB-C Included Power Adapter Specifications: Input: 100 to 240V, 50/60 Hz Output: 100 watts USB-C |
| Auto Zero | Automatically establishes zero reading at startup User-enabled re-establish zero |
| Alarm | User selectable audible, visual, and vibratory (J-Probe only) |
| Flow Control | 1 cfm (28.3 lpm) +/- 5% |
| Reagent Settings | PAO-4, PAO-4 High, DOP (DEHP), DEHS (DOS), Ondina, Paraffin, User-Defined Reagents |
| Dynamic Range | 0.0001 mg/m3 (µg/l) to 120 mg/m3 (µg/l) Up to 600 mg/m3 (μg/l) PAO High |
| Accuracy | 1% of readings (0.01% to 100%) |
| Repeatability | 0.5% of readings > 0.01% to 100% |
| Data Output | Thermal printer (optional), USB, Wi-Fi |
| Data Storage (2J PRO only) | Up to 64GBs. Data cannot be edited per 21 CFR Part 11 |
| Reports (2J PRO only) | Leak test results saved as a PDF (Summary and Detailed) and CSV file |
| Standards Compliance | |
| Industry | 21 CFR Part 11, ISO 14644-3, NSF-49, IEST-RP-CC034, EN 12469, ISO/IEC 17025 (ships from ATI with ISO/IEC 17025 accredited calibration) |
| Electrical & Safety | CE, UKCA, EN 61010-1:2010, EN 61326-1:2021, FCC Part 15 Subpart B, ISED Canada ICES-003 Issue 7 |
Get the job done faster with a user-friendly interface and ergonomic hardware.
Intuitive, Easy-to-Use Interface
- Fast and easy setup—begin scanning right away
- Critical leak test parameters displayed on screen
- Easy to change Reagent, Upstream Concentration, and Alarm Set Point
- Users can perform firmware updates to add features
- Supports multiple languages
- On-board help

Hardware Engineered for Convenience
- 17.8 cm (7 in.) scratch-resistant color touchscreen compatible with nitrile gloves
- Angled high-resolution display for optimal viewing
- Standby Mode turns off the pump, extending battery life and minimizing noise
- Lightweight, 7.7 kg (17 lbs) and durable
- Enhanced flow control: +/-5%
- Easy to wipe clean

Key Functions Controlled Directly from J-Probe
- Large, 10.9 cm (4.3 in.) color touchscreen
- Enable the Upstream/Downstream/Standby functions from J-Probe
- Start and Stop leak scans from the J-Probe
- Send leak test results to the optional thermal printer


External Battery (Optional)
- The 2J can be operated with an external battery
- Use any commercially available battery (min. 100W output with USB-C connection)
- External battery is hot-swappable within 10 seconds, avoiding shutdown when switching to/from battery power
- Scan ~20 standard 0.61 x 1.22 m (2 x 4 ft) HEPA filters with normal operation using a 26K mAh capacity battery3
3 Using battery purchased from ATI. Individual performance may vary.

The 2J PRO offers unmatched leak test traceability, data storage and reporting.
Leak Test Results Traceability
- Leak test IDs provide traceability of each saved leak test
- Filter ID
- Job ID
- Room ID
- User ID
- Customer/Site ID
- Leak test IDs are included with all saved and printed reports

Data Storage and Reporting
- Leak test results are saved as a PDF (Summary and Detailed) and CSV file
- 64GB of storage, up to 150,00 saved scans
- Data retrieved after applying filters
- Data can be exported via Wi-Fi, USB flash drive, or optional thermal printer
- Previously saved leak test results are viewable on the unit
Data Security
- Saved leak test results cannot be edited on the 2J, meeting 21 CFR Part 11 requirements
- Saved leak test data can be password protected
- User login for additional data integrity and traceability
Multi-User Level Access
- Four user levels – Administrator, Supervisor, Technician, and Guest
- Each user has a unique username and password
- Administrator can determine which functions are available for each user level
- Up to 250 users can be created

Audit Trail
- 21 CFR Part 11 compliant with 30,000 recorded activities
- Captures all changes with date/time stamp:
- System settings
- Operational settings
- User log in / log out
- Only Administrator level user can download the audit trail
Future firmware updates will be posted here.
Future home of 2J How-to videos.
Part Numbers
| Part Number | Description |
|---|---|
| 2J | 2J Base Unit |
| 2J-BNDL | 2J, J-Probe, Case |
| 2J-PRO | 2J PRO Base Unit |
| 2J-PRO-BNDL | 2J PRO, J-Probe, Case |
| 2JN | 2J-N Base Unit |
| 2JN-BNDL | 2J-N, J-Probe, Case |
| 2JN-PRO | 2J-N PRO Base Unit |
| 2JN-PRO-BNDL | 2J-N PRO, J-Probe, Case |
Optional Accessories
| Item | Description | Part Number |
|---|---|---|
| Thermal Printer | Rechargeable internal battery, 5.08 cm (2 in.) wide thermal paper | 2J-THERM-PRNT |
| External Battery | Anker Prime Power Bank (26K, 300W) | 2J-EXT-BTY |
