OPEN-PATH GAS ANALYZER
BeamStack®
Gas analysis with excellent precision directly at the source, across gas streams, or through open air paths.
The BM-H-3 BeamStack® is a state-of-the-art turnkey solution utilizing Tunable Diode Laser Absorption Spectroscopy (TDLAS) for precise laser gas analysis.
Effortless integration: Engineered for seamless integration, the analyzer is ideal for both industrial environments with PLC systems as well as research laboratories. It facilitates easy export and visualization of raw and processed data for post-processing in third-party tools.
Advanced TDLAS technology: By leveraging the robust and proven TDLAS technology, the BM-H-3 BeamStack®
delivers rapid (100 µs) and highly sensitive (ppb-level) trace gas analysis. This technology is inherently self-referencing and calibration-free, ensuring minimal maintenance.
Versatile gas analysis: The analyzer is capable of detecting a wide range of gases commonly found in industrial and laboratory settings, including greenhouse gases such as methane (CH₄). Other commonly analyzed gases include O₂, CO₂, CO, N₂O, NH₃, HF, H₂S, H₂O and HCl.
Energy efficient design: The highly energy-efficient design allows the BM-H-3 BeamStack® to operate for hours on batteries, making it possible to deploy for mobile analysis applications without external power sources.
Durability and robustness: Designed for heavy industrial use, the calibration-free gas analyzer system is exceptionally durable and robust, capable of withstanding harsh environments.
• Turnkey cross-stack gas analyzer
• Absolute gas quantification
• Calibration-free gas analysis
• Analyze trace gases
• Digital and analog data interfaces
• IP67 grade mechanics
• Not disturbed by other gases (no cross-talk)
Examples of applications:
- High-Sensitivity Gas Analysis
- Industrial Emissions Monitoring
- Calibration-Free Gas Detection
- Greenhouse Gas Measurement
- Portable Gas Analyzer for Remote Locations
| Examples of gases | |
| Gas | Analysis precision (ppm)*) |
| O₂ | 6 |
| HF | 0.01 |
| CO | 0.2 |
| CO₂ | 0.5 |
| CH₄ | 0.2 |
| H₂S | 0.3 |
| NH₃ | 0.2 |
| H₂O | 0.2 |
| *) Under standard test conditions: L = 1 m, t = 1 s, P = 1 atm, T = 300 K, largest of 1% relative and specified precision | |
| Spectroscopy Characteristics | ||||
| Parameter | Min | Typical | Max | |
| Ramp period | 100 µs | 120 µs | 240 µs | |
| Temperature set stability | 0.1 mK | |||
| Laser current | 0 mA | 400 mA | ||
| Data sampling channels | 1 | |||
| Data sampling resolution | 24 bits | |||
| Data sampling noise (V) | 0.1 µVrms* | |||
| Data sampling noise (ADU) | 0.1 * | |||
| Low-light limit (10 s) | 1 nW | |||
| *1 s sampling time | ||||
| Interfaces | |||
| Interface | Model | Mounted | Quantity |
| USB | 53398-0471 Communication, Data | Yes | 2 |
| USB | Mini USB, Firmware upgrade | Yes | 2 |
| RS-485 | 4 wire Full Duplex - protected | Yes | 1 |
| RS-485 | 4 wire Full Duplex - service data | Yes | 1 |
| RS-485 | Half Duplex | Yes | 1 |
| Trig In | 4-30 V | Yes | 2 |
| IO | 0-12 V | Yes | 2 |
| IO Supply | 12 V | Yes | 1 |
| Relay Output | G6K-2F-5DC, NC/NO | Yes | 2 |
| 4-20 mA | Passive / Active | Expansion | 2 |
| Expansion connector | I2C, SPI, GPIO, ADC, Loop Relay, Sync, GND, PWM, UART, Relay, IO, 5 V, 2.5 V, 12 V, PWR_IN, 4-20 mA, 0-10 V | Yes | 3 |
| Sync signals | Daisy chain configuration | Yes | 2 |
| Master clk in / out | 73412-0110 | Yes | 2 |
| Electrical Characteristics | ||||
| Parameter | Min | Typical | Max | |
| Supply voltage | 15 VDC* | 24 VDC | 32 VDC | |
| Power consumption | 5 W** | |||
| TEC driver power | 0 W | 3.56 W | ||
| Comm. link length | 30 m | |||
| Comm. link speed | 3 Mbit/s | |||
| Startup-time (ambient) | 5 s | |||
| *Degraded noise performance if Vin < 15 V | ** 50 mA laser diode | ||||
| Other | ||||
| Parameter | Min | Typical | Max | |
| Operating temperature | -10 °C | 50 °C | ||
| Humidity (non-condensing) | 40% @ 50 °C / 80% @ 30 °C | |||
| IP classification | IP67 | |||
| Infrared laser | Laser Class I | |||
| CE-marked EU directives | 2014/35/EU, 2012/19/EU, 2011/65/EU, EN61000-6-2:2005, EN61000-6-2:2019, EN61000-6-4:2007, EN61000-6-4:2019 | |||
BeamStack accessory
StackMount
For BeamStack TDLAS analyzers
Made in Lund, Sweden
Flange interface
DN50 PN6
Wetted material
SS316
Axial adjustment
41.5–44.5 mm
Angular adjustment
±5°
Description
StackMount is a flange assembly that carries a BeamStack transmitter and receiver pair on opposing ports across a duct or stack. It mounts to standard DN50 PN6 process flanges, sets the optical alignment as a mechanical adjustment held by set screws, and separates for window cleaning without losing that alignment.
Protective windows isolate the analyzer optics from the process gas, and an integrated purge connection on each side flushes the volume in front of the window. All surfaces in contact with the process gas are SS316.
Features
- Mounts to standard DN50 PN6 process flanges
- Compact and lightweight to simplify installation and service
- Alignment set by hand, locked mechanically by set screws
- Separates for cleaning with no re-alignment on reassembly
- Integrated protective window each side
- Integrated purge connection each side, 6 mm or 8 mm push fit
- SS316 throughout the wetted path
- Optical design for minimal interference
- Designed and built by Beamonics
Specifications
| Flange interface | DN50 PN6 |
|---|---|
| Wetted materials | SS316 |
| Optical isolation | Protective windows, 1 per side |
| Purge connection | 6 mm or 8 mm push fit, 1 per side |
| Configuration | Cross-stack pair |
|---|---|
| Axial adjustment | 41.5 mm to 44.5 mm |
| Angular adjustment | ±5° |
| Alignment retention | Set screws, M4x8, hex 2 |
| Adjustment screws | M5x20 |
| Analyzer | BeamStack |
|---|---|
| Optical configuration | Cross-stack, in-situ |
| Measurement principle | TDLAS |
| Reported unit | ppm |
| Alignment method | Manual tilt, screw-fixed |
|---|---|
| Alignment reference | Transmission value, ATLAS |
| Re-alignment after cleaning | Not required |
| Tools | Hex 2, hex 4, hex 5 |
Alignment at installation
Alignment on a cross-stack instrument decides whether the measurement is stable, and StackMount handles it as a mechanical adjustment made once. With the set screws released, the transmitter tilts by hand inside the mount while the installer watches the live transmission value in the ATLAS software. The adjustment screws hold the position that gives the best signal, and tightening the set screws fixes it.
Because alignment is held by the mount rather than by the position of the instrument in the port, the optical head can be removed for window cleaning and refitted on the same setting. That matters most on processes where the windows need attention on a fixed maintenance interval, where repeating a full alignment on every visit is the cost that adds up.
Download BeamStack® Datasheet
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