Cross-stack in-situ gas analyzer
BeamStack®
Cross-duct gas analysis directly at the source, with ppb-level trace gas sensitivity and no sampling line.
- Configuration
- Cross-stack, in-situ
- Measurement
- ppm
- Analysis rate
- 1 Hz typical, 10 kHz max
- Supply voltage
- 24 VDC typical, 15 to 32 VDC
- Mounting
- Optional StackMount
- Protection
- IP67
Specifications
BeamStack is a cross-duct in-situ gas analyzer. It uses Tunable Diode Laser Absorption Spectroscopy (TDLAS) to measure directly in the process, with the transmitter and receiver mounted on opposite sides of a duct, stack or pipe.
BeamStack suits industrial environments with PLC systems as well as research laboratories, and makes it easy to export and visualize raw and processed data for post-processing in third-party tools. For mounting on stacks and pipes, the StackMount DN50 PN6 flange adapter is available as an option.
TDLAS delivers millisecond-rate, ppb-level trace gas analysis. The measurement is self-referencing and calibration-free, which keeps maintenance to a minimum. Careful line selection is an inherent part of the Beamonics design process, and the analyzer offers little to no cross-interference from other gases.
BeamStack measures a wide range of gases found in industrial and laboratory settings, including greenhouse gases such as CH₄, as well as O₂, CO₂, CO, C₂H₂, N₂O, NH₃, HF, H₂S, H₂O and HCl. The precision for each gas under standard test conditions is listed under Examples of gases.
At 5 W typical power consumption, BeamStack can operate for hours on batteries, so it can be deployed for mobile analysis without an external power source. It is built for heavy industrial use and harsh environments.
- Cross-duct in-situ gas analyzer
- Absolute gas quantification
- No calibration gas needed
- Trace gas analysis at ppb level
- IP67 housing
- Little to no cross-interference from other gases
- Digital and analog data interfaces
- Low maintenance requirements
- Optional StackMount DN50 PN6 flange adapter
BeamStack suits applications where gas can be measured directly in the process, including:
- Measurement directly across stacks, ducts and pipes, with no sampling line
- Industrial process monitoring, integrated with PLC systems
- Research laboratories, with raw and processed data exported to third-party tools
- Trace gas analysis at ppb level
- Greenhouse gas measurement, including CH₄
- Mobile analysis on battery power, without an external power source
| Gas | Precision, ppmnote a |
|---|---|
| O₂Oxygen | 20 |
| HFHydrogen fluoride | 0.01 |
| COCarbon monoxide | 0.2 |
| CO₂Carbon dioxide | 0.5 |
| CH₄Methane | 0.2 |
| C₂H₂Acetylene | 0.08 |
| N₂ONitrous oxide | 0.03 |
| NH₃Ammonia | 0.2 |
| HClHydrogen chloride | 0.07 |
| H₂SHydrogen sulfide | 0.3 |
| H₂OWater vapor | 0.2 |
Note a: Under standard test conditions: L = 1 m, t = 1 s, P = 1 atm, T = 300 K, largest of 1% relative and specified precision.
| Analysis rate | fR | Not specified | 1 Hz | 10 kHz |
|---|---|---|---|---|
| Data sampling noise | Not specified | Not specified | 0.1 µVrmsnote 1 | Not specified |
| Low-light limit (10 s) | ILL | Not specified | 1 nW | Not specified |
Note 1: 1 s sampling time
| USB | 53398-0471 Communication, Data | Yes | 2 |
|---|---|---|---|
| USB | Mini USB, Firmware upgrade | Yes | 2 |
| RS-485/422 | 4 wire Full Duplex - protected | Yes | 1 |
| RS-485/422 | 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 |
| Supply voltage | Vin | 15 VDCnote 2 | 24 VDC | 32 VDC |
|---|---|---|---|---|
| Power consumption | Not specified | Not specified | 5 Wnote 3 | Not specified |
| TEC driver power | Not specified | 0 W | Not specified | 3.56 W |
| Comm. link length | Not specified | Not specified | Not specified | 30 m |
| Comm. link speed | Not specified | Not specified | Not specified | 3 Mbit/s |
| Startup time (ambient) | tsu | Not specified | 5 s | Not specified |
Note 2: Degraded noise performance if Vin < 15 V
Note 3: 50 mA laser diode
| Operating temperature | Top | −10 °C | Not specified | 55 °C |
|---|---|---|---|---|
| Humidity (non-condensing) | Not specified | 40% at 50 °C / 80% at 30 °C | ||
| IP classification | Not specified | IP67 | ||
| Infrared laser | Not specified | Laser Class 1 | ||
| CE-marked EU directives | Not specified | 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 the mount holds the alignment, 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.
BeamStack datasheet
Specifications, interfaces and dimensions for BeamStack and the StackMount flange adapter, as a PDF
Product video
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Talk to our TDLAS experts
Talk to an engineer about your BeamStack application
Tell us about the gas, the process and the measurement point, and an engineer will help you work out whether BeamStack fits the application. Beamonics analyzers are designed and built in Lund, Sweden.
